Samsung Galaxy S25 Ultra · Gaming Review
Samsung Galaxy S25 Ultra Gaming Review: Performance, Heat & Battery Drain
The Galaxy S25 Ultra is a fast gaming phone in short sessions and a throttled one in long ones — and no honest review of it can quote a frame rate, a temperature or a gaming-hours figure, because no source that tested this exact model published one. This desk review says what the labs actually measured, and states plainly what they did not.
Methodology: a desk review, not a hands-on test
FixUpPhone did not play games on this phone, measure frame rates, record temperatures or time battery drain. This review is a desk review: it compares Samsung’s published gaming claims with the results of an independent laboratory that tested this exact model, the Galaxy S25 Ultra, and it labels every number by source. Where a figure comes from Samsung, it is called a manufacturer specification or a manufacturer claim. Where it comes from GSMArena’s laboratory review, it is called an attributed third-party lab result. No frame rate, temperature, drain-rate or gaming-hours figure appears anywhere in this review, because no source used here published one for this model — and no such figure from the Galaxy S26 Ultra, the base Galaxy S25 or S25+, or any iPhone is used as a figure for this phone. The 31-hour figure below is Samsung’s video-playback figure, measured under Samsung’s lab conditions; it is never used as a gaming figure.
Sources used: Samsung’s own product pages and Newsroom specification table for the Galaxy S25 Ultra (as recorded in the verified pack checked 15 October 2026, with the independent re-verification addendum of the same date); GSMArena’s Galaxy S25 Ultra laboratory review (2025), read 5 November 2026. Repair and list prices were re-checked at write time on 5 November 2026 — see the Repair section and the Sources section for the outcomes.
Quick Expert Summary
Verdict in one line: a strong gaming phone for typical sessions, held back by heavy throttling under continuous load — and a phone whose gaming battery life has no published hours figure at all.
- Chip: Snapdragon 8 Elite for Galaxy in ALL regions (manufacturer specification — no Exynos variant anywhere), 12GB RAM at every storage tier, Adreno 830 GPU.
- Gaming claims: Samsung claims improved real-time ray tracing and Vulkan optimization for ultra-smooth gameplay (manufacturer claims from Samsung’s product page), and ProScaler upscaling is present on this model (manufacturer specification).
- Heat: under continuous stress testing, GSMArena measured a 41% CPU performance loss and a 50% GPU performance drop. The phone gets warm under stress, but never hot — and no temperature figure is quoted here, because none is relied on from the sources used (attributed third-party lab results).
- What the lab saw in games: the phone runs at 120Hz in games, and GSMArena observed no visible throttling or stutter in long gaming sessions — an anecdotal observation, not a measurement, and labelled as such here.
- Battery: 5,000 mAh typical (4,855 mAh rated). Samsung’s only published usage figure is up to 31 hours of video playback — video only, never a gaming figure. No FPS, temperature, drain-rate or gaming-hours figure exists in the sources used here.
Specifications
All figures in this section are manufacturer specifications from Samsung unless noted.
| Chip | Snapdragon 8 Elite for Galaxy, in ALL regions — the entire S25 series is Snapdragon-only globally; no Exynos variant anywhere |
|---|---|
| CPU / GPU | 2 prime Oryon cores up to 4.47 GHz, 6 performance cores up to 3.53 GHz; Adreno 830 GPU (spec databases) |
| RAM / storage (US) | 12GB LPDDR5X RAM at every tier; 256GB / 512GB / 1TB UFS 4.0 storage; no microSD slot |
| Display | 6.9-inch Dynamic AMOLED 2X, QHD+ (3120 × 1440, about 498 ppi, spec databases), adaptive 1–120Hz; 120Hz in games (GSMArena) |
| Gaming features | Improved real-time ray tracing and Vulkan optimization for ultra-smooth gameplay (manufacturer claims); ProScaler present (S25+ and S25 Ultra only, Samsung footnote) |
| Battery | 5,000 mAh typical / 4,855 mAh rated; video playback up to 31 hours is Samsung’s only published usage figure |
| Charging | 45W wired, Super Fast Charging 2.0, up to 65% in around 30 minutes — Samsung’s only charge-time claim; 15W wireless (Qi2 Ready, no built-in magnets); 4.5W reverse |
| Battery care | Basic, Maximum and Adaptive charge settings (GSMArena): Maximum limits charging to 80–95%, Adaptive uses Maximum overnight |
| Cooling | Samsung publishes no vapour-chamber size or cooling-system specification for this model in the materials checked |
| Audio | Hybrid stereo speakers; GSMArena rated loudness “Very Good” (speaker test, not a gaming measurement) |
Finding, not a gap in this review: no FPS figure, no temperature figure, no battery drain-rate and no gaming-hours figure for this exact model is quoted in the sources used here, so none is claimed. The 41% CPU and 50% GPU sustained-performance losses are GSMArena’s stress-test measurements, not gaming frame-rate measurements — they describe how much performance the chip gives up under continuous load, not how many frames per second a game runs at. The 31-hour figure is video playback under Samsung’s lab conditions, not gaming.
Analysis: what gaming on this phone actually looks like
The hardware: fast, with a big, smooth screen
On paper this is a serious gaming phone. The Snapdragon 8 Elite for Galaxy is a 3 nm chip with two prime cores at up to 4.47 GHz, the Adreno 830 GPU, and 12GB of RAM at every storage tier — and because the whole S25 series is Snapdragon-only globally, there is no Exynos variant and no regional performance split to worry about. The screen is a 6.9-inch QHD+ Dynamic AMOLED 2X panel with adaptive 1–120Hz refresh, and GSMArena got the phone to work at 120Hz in games — so high-refresh gaming is real on this model, not a specification-sheet promise. Samsung claims improved real-time ray tracing and Vulkan optimization for ultra-smooth gameplay, and ProScaler — Samsung’s AI-enhanced upscaling, present on the S25+ and S25 Ultra only — is part of the display story for games rendered below native resolution. Those are manufacturer claims, not lab measurements, and this review does not attach a frame rate to them.
Heat and throttling: the sustained-load numbers
The most important gaming numbers in this review are not frame rates — there are none to quote — but the sustained-load percentages from GSMArena’s stress tests: a 41% CPU performance loss and a 50% GPU performance drop under continuous stress, with sustained performance similar to the Galaxy S24 Ultra’s. The lab’s own summary is that the sustained performance isn’t ideal: the behaviour is similar to most flagships, yet somehow a little worse here. The phone gets warm under continuous stress testing, the lab reports, but never hot — and no temperature figure is quoted here because none is relied on from the sources used. The practical reading is that a game that leans on the GPU continuously will, over a long session, run at roughly half the chip’s peak GPU performance. What the lab did not see, and what matters just as much, is visible consequences: in long gaming sessions, GSMArena never observed visible throttling or stutter. That is an anecdotal observation, not a measurement — it tells you the throttling does not usually show up on screen, even though the stress-test percentages show it is happening underneath.
Battery drain: the figure that does not exist
Battery life is where honesty matters most in a gaming review, because this is the number buyers ask for first and the number no source provides. Samsung’s only published usage figure for this phone is up to 31 hours of video playback, measured under Samsung’s internal lab conditions (pre-release device, Bluetooth earphone, default settings over LTE, a 720p file stored on the device). That figure must never be used as a gaming figure: gaming is a far heavier load than video playback, and the two numbers describe different things. GSMArena’s battery testing found modest but not insignificant improvements over the previous generation in its gaming test and in video playback, with web browsing and voice-call time essentially unchanged — a qualitative finding, not a hours figure, and this review does not convert it into one. No audio-playback, typical-use or talk-time figure is published by Samsung for this model either. The honest statement is that gaming battery life on this phone is unquantified in the sources used here: the 5,000 mAh typical capacity (4,855 mAh rated) is the only hard number, and the EU label’s 44:54-hour standardised endurance is a regulatory test result, not a Samsung usage claim and not a gaming figure.
Charging while you play
Charging is 45W wired with Super Fast Charging 2.0, and Samsung’s only charge-time claim is up to 65% in around 30 minutes with a 45W adapter (sold separately). GSMArena’s own charging test, using Samsung’s 45W adapter, reached 41% in 15 minutes, 72% at the half-hour mark and 100% in 59 minutes — an attributed third-party lab result, and notably faster at the 30-minute mark than Samsung’s own claim. One practical improvement GSMArena found: the phone no longer needs a 5A cable to reach its maximum charging power — the 3A cable in the box reached a 39W peak with the 45W charger. Wireless charging is 15W (Qi2 Ready; magnetic snap-on alignment requires a Qi2 magnetic case, since there are no built-in magnets) and reverse wireless charging is 4.5W. The phone’s battery-care settings matter for heavy gamers: the Maximum setting limits charging to 80–95%, and Adaptive uses Maximum overnight — both reduce the time the battery spends at full charge, which is the single most useful habit for a phone that is charged daily and played hard.
The rest of the gaming experience
The speakers are a hybrid stereo pair — one bottom speaker and the earpiece up top — and GSMArena rated their loudness “Very Good”, the same as the previous generation, with a little more low-end oomph in certain tracks. That is a speaker-test rating, not a gaming measurement, and it is labelled as such. The S Pen is built in and IP68-rated, but it has no Bluetooth and no Air Actions, so it plays no part in gaming — it is a note-taking and navigation tool, not a controller. The phone launched with Android 15 and One UI 7, with seven generations of OS upgrades and seven years of security updates, so the software side of gaming — including Samsung’s DeX desktop mode for a bigger screen — will be supported for a long time. And the titanium frame, at 218 g, is the part of the build that held up best in independent drop testing — relevant, because a gaming phone gets handled hard.
Pros & Cons
Pros
- Chart-topping burst performance from the Snapdragon 8 Elite for Galaxy, in all regions with no Exynos variant.
- 120Hz in games on a large 6.9-inch QHD+ panel (GSMArena).
- No visible throttling or stutter observed in long gaming sessions (GSMArena, anecdotal observation).
- ProScaler upscaling present; Samsung claims improved ray tracing and Vulkan optimization (manufacturer claims).
- Fast charging no longer needs a 5A cable — the in-box 3A cable reaches peak power (GSMArena).
Cons
- Heavy throttling under sustained load — 41% CPU loss and 50% GPU drop in GSMArena’s stress tests.
- No FPS figure, no temperature figure, no drain-rate and no gaming-hours figure exist in the sources used here — gaming battery life is unquantified.
- The 31-hour figure is video playback only and must never be read as gaming endurance.
- 45W charging is relatively slow for a flagship, and there is no charger in the box (GSMArena).
- No built-in Qi2 magnets — magnetic alignment needs a magnetic case.
Buying: the gaming checks that matter
If you are buying a used Galaxy S25 Ultra to game on, test it as a gamer would. Play a demanding game for at least ten minutes and watch for stutter once the phone is warm; feel the frame and the back for heat, and check whether the game still runs smoothly after the phone has been working hard. Confirm the display runs at 120Hz in the game, that touch responds across the whole panel including the edges, and that the stereo speakers both work — a front-down drop can silence a speaker, as Allstate’s drop test showed. Ask whether the phone has ever overheated, shut down, or had its battery replaced: a degraded battery makes a gaming phone feel slow and drain fast long before the chip is the limit. Because launch buyers are outside Samsung’s standard 1-year warranty (expired around February 2026; each buyer’s warranty runs from their own purchase date), a used unit is unlikely to carry remaining Samsung warranty — check the purchase date, but remember the warranty covers defects, not accidental or liquid damage. And set expectations on battery: no source used here publishes a gaming-hours figure for this phone, so do not let a seller quote you one.
Repair angle: gaming problems are usually a battery or heat problem before they are a chip problem. A degraded battery (Samsung publishes no standalone battery price — it is quoted after diagnosis; Care+ covers battery repair subject to a diagnostic confirming 79% or less capacity) makes games stutter and drain fast. If a used unit feels sluggish once warm, price the battery first — the Repair section has the figures Samsung actually publishes, and the overheating and battery-drain guides linked below cover the diagnosis steps.
Repairability: gaming
Gaming wear lands on the battery first, and the battery is the easiest internal part to replace on this phone. iFixit’s teardown (February 2025) gave the Galaxy S25 Ultra a provisional repairability score of 5 out of 10 — the best score iFixit had given a Samsung phone in years, and still only middling. The battery is held by four pull-tabs that release by hand, without heat, prybars or solvents, so a battery degraded by years of gaming and fast charging is a straightforward service job. The USB-C port is modular — relevant, because a gaming phone lives on its charging port — and the rear cameras are modular. The bad news is adhesive: adhesive alone secures the screen and back cover, and the screen is tightly glued to the chassis, so any repair that enters the phone needs fresh adhesive on reassembly. Samsung’s own repair structure reflects the same reality: the front-screen-only tier ($279 suggested) is eligible only when the frame is not bent or broken, the battery is not swollen and no other hardware failure is found; anything wider routes to the Screen Module tier (screen + bezel/frame + battery), for which Samsung’s table lists no published price (“–”). FixUp offers gaming-related repair at all three stores and by mail-in, with 1–7 day turnaround and a 3-month warranty; FixUp does not publish a fixed repair price — you receive a quote after assessment, because the final scope depends on whether the fault is the battery, the port, or something deeper.
Repair & Mail-In: Galaxy S25 Ultra gaming
Samsung US publishes only the front-screen tier statically for this model. The $279 figure below was verified current at write time on 5 November 2026: Samsung’s US Cracked Screen Repair page still lists the Galaxy S25 Ultra at $279 for Screen Repair (front screen only) and “–” for Screen Module Replacement. Samsung’s figures are suggested prices, may vary by region or authorised store, and exclude taxes and fees. The current US list prices — $1,299.99 / $1,419.99 / $1,659.99 for 256GB / 512GB / 1TB — are last-checked figures from 15 October 2026 (Samsung US consumer buy pages, per the independent re-verification addendum; Samsung’s product page renders its price through a selector with no static figure readable, so no newer list price could be verified at write time). No October 2026 list-price rise applies to this model, unlike the S26 line. Samsung publishes no static US price for battery, back glass, rear camera or charging-port repair for this model: those are quoted through Samsung’s service flow after diagnosis. There is no Samsung “other damage” tier price. FixUp’s own pricing is a quote after assessment, never a published fixed price.
| Repair | Samsung US suggested price | With Samsung Care+ |
|---|---|---|
| Front screen only | $279 (verified current 5 Nov 2026; eligible only if frame not bent/broken, battery not swollen, no other hardware failure) | $29 per claim (standard); $0 (Theft and Loss) |
| Screen Module (screen + bezel/frame + battery) | Not published — Samsung’s table lists “–” | Via Care+ claim terms |
| Battery | Not published — quoted after diagnosis | Included, subject to a diagnostic confirming 79% or less capacity |
| Back glass | Not published — quoted after diagnosis | $29 per claim (standard); $0 (Theft and Loss) |
| Rear camera / charging port | Not published — quoted after diagnosis | Via Care+ accidental-damage / breakdown terms |
At the $1,299.99 list price for the 256GB model (last checked 15 October 2026), the $279 front-screen repair is 21.5% of the phone’s list price. Samsung’s completed repairs carry a 90-day warranty, and Samsung’s mail-in turnaround estimate is 5–7 business days. No per-model Samsung Care+ monthly price is published by Samsung; lost/stolen deductibles under Theft and Loss are a $99–$199 range, with no S25-Ultra-specific point figure published. Launch buyers are outside Samsung’s 1-year warranty (expired around February 2026); a new buyer’s own 1-year warranty runs from their purchase date. The warranty covers defects, not accidental or liquid damage, and IP68 (1.5 m freshwater, 30 minutes, lab conditions) is not permanent and does not make liquid damage warranty-covered.
FixUp stores
- Lynwood: 3100 E Imperial Hwy, Store M1002, Lynwood, CA 90262 — open daily 11 AM–8 PM — (805) 857-4225
- Santa Barbara: 619 A State St, Santa Barbara, CA 93101 — Mon–Fri 11 AM–8 PM, Sat 10 AM–8 PM, Sun 12 PM–7 PM — (805) 857-4226
- Las Vegas: 875 S Grand Central Pkwy, Unit TT32, Las Vegas, NV 89106 — Mon–Sat 10 AM–8 PM, Sun 10 AM–7 PM — (818) 482-3605
Mail-in repair
Mail-in is available for gaming-related repair. You pay the inbound postage and FixUp pays the return postage. Back up first, and do not ship your phone before your mail-in instructions are confirmed — confirm instructions before shipping. Never mail a hot or swollen phone — contact support@fixupphone.com first. Repairs take 1–7 days once the phone is received, and carry a 3-month warranty.
What to do first
- Back up the phone before any repair.
- Note when the problem appears — in bursts, after ten minutes of gaming, or while charging — it changes the diagnosis.
- Get the quote after assessment before authorising work, and confirm whether the fault is the battery, the port, or something deeper.
Decision
Buy the Galaxy S25 Ultra for gaming if you play in typical sessions and want a big, smooth, 120Hz screen with a chart-topping chip and a pen for everything else — it is a strong gaming phone for the way most people actually play. Do not buy it expecting sustained peak performance across hours of heavy play: GSMArena’s stress tests measured a 50% GPU drop under continuous load, and no frame-rate figure in this review can tell you otherwise, because none exists for this model. And do not buy it on a promised gaming battery life — no source used here publishes one, and the 31-hour figure is video playback, not gaming. For a used purchase, a ten-minute warm gaming test is worth more than any specification: if it stays smooth once warm, the phone is fine; if it stutters or drains fast, price a battery first. For a trade-in quote on your current phone, bring it to any FixUp store or contact support@fixupphone.com — quotes are given after an in-person assessment of the device’s condition, never sight unseen.
FAQ
What FPS does the Galaxy S25 Ultra get in games?
No FPS figure is quoted in this review, because no source used here published one for this exact model. GSMArena’s lab ran the phone at 120Hz in games and observed no visible throttling or stutter in long gaming sessions, and its stress tests measured a 50% GPU performance drop under continuous load — but a stress-test percentage is not a frame rate, and this review does not invent one.
Does the Galaxy S25 Ultra overheat while gaming?
GSMArena reports it gets warm under continuous stress testing, but never hot. No temperature measurement for this exact model is quoted in this review, because no temperature figure from a source used here is relied on — heat is discussed through throttling measurements, not invented degrees.
How long does the Galaxy S25 Ultra battery last while gaming?
No gaming-hours figure exists in the sources used here, so this review states none. Samsung’s only published usage figure is up to 31 hours of video playback, measured under Samsung’s lab conditions — video only, never a gaming figure. GSMArena’s battery testing found modest improvements over the previous generation in its gaming test, but that is a qualitative finding, not a hours figure.
Does the Galaxy S25 Ultra support 120Hz gaming?
Yes. GSMArena got the phone to work at 120Hz in games, on its 6.9-inch QHD+ Dynamic AMOLED 2X panel with adaptive 1–120Hz refresh. ProScaler upscaling is also present on this model.
How fast does the Galaxy S25 Ultra charge?
45W wired with Super Fast Charging 2.0; Samsung’s only charge-time claim is up to 65% in around 30 minutes. GSMArena’s own test with Samsung’s 45W adapter reached 41% in 15 minutes, 72% at 30 minutes and 100% in 59 minutes. Wireless charging is 15W (Qi2 Ready, no built-in magnets); reverse wireless charging is 4.5W.
Can I use the S Pen while gaming?
The S Pen is built in and IP68-rated, but it has no Bluetooth, no battery and no Air Actions — it is a note-taking and navigation tool, not a gaming controller. Air Command, which does not need Bluetooth, remains.
How much does a Galaxy S25 Ultra screen replacement cost?
Samsung’s suggested front-screen-only price is $279 (verified current 5 November 2026; may vary by region or authorised store, excludes taxes and fees), or $29 per claim under standard Samsung Care+ and $0 under Care+ with Theft and Loss. Samsung publishes no Screen Module price (“–”). FixUp quotes after assessment, with 1–7 day turnaround and a 3-month warranty.
Is the Galaxy S25 Ultra good for long gaming sessions?
For typical sessions, yes — GSMArena observed no visible throttling or stutter in long gaming sessions. Under continuous stress the GPU drops by 50% from peak, so very long heavy sessions run below burst speed, and gaming battery life is unquantified in the sources used here. If you game for hours at a stretch, test a used unit warm before you buy it.
Desk review — no hands-on testing by FixUpPhone · Every number labelled by source · Sources dated in the sources section
FixUp repairs: 1–7 days · 3-month warranty · Quote after assessment · Mail-in: you pay inbound, FixUp pays return
Questions? support@fixupphone.com · Lynwood (805) 857-4225 · Santa Barbara (805) 857-4226 · Las Vegas (818) 482-3605
Sources
- Samsung — Galaxy S25 Ultra product pages and Newsroom specification table (Snapdragon 8 Elite for Galaxy, 12GB memory with 256GB / 512GB / 1TB storage, 6.9-inch Dynamic AMOLED 2X, 1–120Hz adaptive, ProScaler on S25+ and S25 Ultra only, 45W wired charging with up to 65% in around 30 minutes, 5,000 mAh with up to 31 hours of video playback, Android 15 / One UI 7), as recorded in the verified pack (checked 15 October 2026) and its independent re-verification addendum (same date; addendum wins on conflicts).
- Samsung US — Galaxy S25 Ultra product page (samsung.com/us/smartphones/galaxy-s25-ultra/), fetched 5 November 2026: improved real-time ray tracing and Vulkan optimization for ultra-smooth gameplay, CPU 37% faster processing, GPU 30% improved graphics performance, NPU 40% faster AI performance (manufacturer claims), ProScaler, 5,000 mAh with up to 31 hours of video playback, 12GB memory with 256GB / 512GB / 1TB storage. No numeric list price appears in the page’s readable text (price renders through a selector), so the list prices in this article are last-checked figures from 15 October 2026 (Samsung US consumer buy pages, per the re-verification addendum): $1,299.99 / $1,419.99 / $1,659.99.
- GSMArena — “Samsung Galaxy S25 Ultra review” (2025), read 5 November 2026: performance page — sustained performance similar to the S24 Ultra with 41% CPU performance loss and 50% GPU performance drop under continuous stress, warm under stress but never hot, no visible throttling or stutter observed in long gaming sessions, 12GB LPDDR5X; display page — 120Hz in games; battery and charging pages — modest improvements over the previous generation in the gaming test and video playback, charging from empty to 100% in 59 minutes with 41% at 15 minutes and 72% at 30 minutes using Samsung’s 45W adapter, 5A cable no longer required for maximum charging power (39W peak on the in-box 3A cable), 15W wireless per the WPC listing, Basic / Maximum / Adaptive battery-care settings, hybrid stereo speakers rated “Very Good” for loudness.
- 9to5Google — Snapdragon-global launch report (22 January 2025), as recorded in the verified pack: Samsung and Qualcomm confirmed the whole S25 series uses Snapdragon 8 Elite in all regions; no Exynos variant anywhere.
- iFixit — Galaxy S25 Ultra teardown (February 2025), as recorded on iFixit’s smartphone repairability scorecard and teardown reporting, read 5 November 2026: provisional repairability score 5 out of 10, battery held by four pull-tabs, modular USB-C port and modular rear cameras, screen tightly glued to the chassis with adhesive securing screen and back cover.
- Samsung US Support — Cracked Screen Repair page (samsung.com/us/support/cracked-screen-repair/), verified current 5 November 2026 via current page text: Galaxy S25 Ultra Screen Repair (front screen only) $279, Screen Module Replacement “–”, suggested prices may vary by region or authorised store and exclude taxes and fees, front-screen eligibility conditions, 90-day repair warranty, 5–7 business-day mail-in estimate.
- Samsung US Support — Samsung Care+ page (checked 15 October 2026, per the verified pack; terms re-verified 5 November 2026): $29 cracked screen / $29 back glass per claim (standard), $0 / $0 with Theft and Loss, battery repairs subject to a diagnostic confirming 79% or less capacity, lost/stolen deductible $99–$199 range, no per-model S25 Ultra monthly price published by Samsung.