His Radeon Hd 7950 Review

As Nvidia continues lớn roll out its stack of second-generation Kepler graphics cards, we couldn"t help but adjust our focus towards AMD & wonder what"s going on in the red corner. To the best of our knowledge, we won"t be seeing any new desktop GPU products from the firm until the latter kết thúc of the year, và in the meantime we"re left with just the recently released £100/$140 effort, the rather decent Radeon HD 7790, and new editions of last year"s offerings - the price/performance king being the HD 7950.

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Available these days for around £230/$299, this thẻ may not have the out-and-out performance of the top-over HD 7970 but it is very easily overclockable, with the card voltage locked lớn ensure that any tinkering is unlikely khổng lồ have adverse effects on the thẻ. Up against the green corner, the stoông xã version can"t quite match Nvidia"s GeForce GTX 670 in performance terms, but it"s priced more cheaply as a consequence &, provided you get a decent chip, overclocking should take you khổng lồ a comfortable mid-point between GTX 670 và GTX 770 performance - effectively GTX 680 cấp độ then, not bad at all for the price.

But what intrigues us most about it is its 3GB of onboard GDDR5. Right now, that additional gigabyte of RAM sits there virtually unused by the vast majority of games, offering absolutely no performance advantage over the more common 2GB cards. It"s mostly there in order to facilitate a 384-bit memory bus - necessary to compete with the more efficient Nvidia offerings that persize the same or better with a 256-bit interface và less RAM. But the usefulness of that additional memory could change significantly as we move inlớn the next-gene era, with the 8GB of unified RAM present in both consoles offering an architectural advantage over the split-pool set-up seen on PC. Already we"ve seen hints of developers pushing the envelope - the Killzone: Shadow Fall kiểm tra from the February PlayStation 4 reveal uses 3GB RAM for graphics in its pre-production state, & when we approached developers to discuss how khổng lồ future-proof your PC, all of them stressed the need to lớn buy a graphics card which as much onboard Clip RAM as possible.

The Radeon HD 7950 may sit just under the top tier of current GPU performance in the £300/$400 bracket, but the non-boost version that we have here is priced accordingly, and that extra 1GB of video clip RAM is effectively being given away for không tính phí - as far as we"re aware, it is the cheapest 3GB graphics card currently on the market today. Suddenly that year-old tech is starting to lớn look a whole lot more interesting...

"GDDR5 memory options & AMD"s choice of a 384-bit memory bus explains the 3GB configuration - an extravagance for now but potentially very useful once the next-gene consoles arrive sầu."

Gallery:Our XFX Radeon HD 7950 reviews card in all of its glory. It"s a good-looking piece of kit, though compared khổng lồ equivalent Keplers it can get rather loud.
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So where does the thẻ sit in AMD"s current line-up? The processor giant"s most popular cards are the keenly priced Radeon HD 7850 & its more expensive sầu HD 7870 partner, offering 16 và 20 compute units respectively. The HD 7950 is step beyond that, offering up 28 compute units plus a 384-bit memory bus, offering up a 50 per cent increase in memory bandwidth over the cheaper cards. bộ vi xử lý Core frequency is 850MHz, but newer versions of the tech will auto-boost up to lớn 925MHz provided thermal headroom is available (our card is vanilla, lacking this feature). Gigahertz Editions are also available, but we found that our vanilla HD 7950 was absolutely rochồng solid at 1020MHz, with RAM stable at 1370MHz (5.48GHz effective). Getting that extra performance was as simple as moving a couple of sliders within the AMD Catalyst control panel.

But at stock levels, what can you expect from a standard card? Well, we kiông chồng off our analysis with the same kind of testing criteria we used to lớn judge performance on the considerably more expensive GTX 770. We"re running the "Welcome khổng lồ the Jungle" stage of Crysis 3 at high settings with very high unique textures engaged. Anti-aliasing saps performance considerably in this game - even if you"re running with three Titans in SLI - so we"ve sầu opted to lớn retain our standard SMAA 2x medium preference, while v-sync is engaged in order lớn kill tearing. It"s a tough challenge for the thẻ - we"re essentially putting it through an extremely demanding chạy thử that a GPU costing over 40 per cent more failed khổng lồ comprehensively ace, và once again we"re running at both 1920x1080 (1080p) & 2560x1440 resolutions. Our kiểm tra set-up remains the same - we"re utilising a bộ vi xử lý Core i7 3770K overclocked to 4.3GHz, married up with 16GB of DDR3 RAM running at 1600MHz.

"Crysis 3 performance can leave sầu a little to be desired in terms of frame latency và lowest frame-rates, but overall it"s a good giảm giá khuyến mãi for the price."

Crysis 3 at high settings with SMAA 2x & v-sync engaged. Here we"re comparing 1920x1080 and 2560x1440 performance with the card running at stochồng frequencies.

Alternative comparison:

Clearly, you get what you pay for. Performance is degraded compared khổng lồ the GTX 770 at stochồng settings as you would expect, but we were surprised at just how close the HD 7950 came once our overclochồng was in place (there"s a supplementary đoạn phim that demonstrates the difference at 1440p). At the standard clock speed, we were a touch disappointed at the varying latency in frame delivery though - even at 1080p. The ride didn"t feel particularly consistent & while 2560x1440 offered up considerably lower frame-rates across the board, we felt that overall performance was more cấp độ overall - a curious state of affairs.

However, factoring in the price point, plus the hitherkhổng lồ unknown advantages that the additional gigabyte of RAM may offer once next-gene console arrives, not to mention the roông xã solid overclocking potential in the card, the HD 7950 is clearly good value now. Just about the only tangible disappointment from this XFX model was that the dual-người set-up was rather loud, even in comparison to the GTX 670 reference design"s blower with its somewhat annoying whirr. However, clearly on a general cấp độ, AMD thrives on value và with the arrival of additional GTX 700 series cards for release across the summer with no direct AMD counterparts to rival them, we could well see prices on the HD 7950 fall still further.

So how does the card stachồng up across a range of other games versus the more expensive sầu Nvidia offerings we"ve recently taken a look at? The game engine benchmark tests offered up by Metro 2033, Sleeping Dogs, Tomb Raider, BioShoông chồng Infinite, Hitman: Absolution & Metro: Last Light offer up plenty of data we can sink our teeth into. We kiông chồng off with metrics taken at 1080p with every conceivable unique setting (bar PhysX & Tomb Raider"s TressFX) dialled up to the max. Additionally, in order lớn show some kind of context to the figures và to show the ebb và flow of performance, we"ve sầu also included a Clip benchmark too, showing how everything plays out in real time.

Visualising benchmark runs puts raw numbers inkhổng lồ context. Here you can see how the Radeon HD 7950 at stoông xã frquencies matches up lớn its more expensive sầu rivals - the GeForce GTX 670, GTX 680 and the new GTX 770. Overclocking the AMD card effectively gives you GTX 680 class performance.

"The HD 7950 lags behind the more expensive Nvidia competition on all but the most bandwidth intensive tests, but overclocking makes it very competitive sầu."

1920x1080 GTX 670 GTX 680 GTX 770 Radeon HD 7950 Radeon HD 7950 (OC) BioShock Infinite, DX11 Ultra DDOF Tomb Raider, Ultra, FXAA Metro 2033, Very High, 4x MSAA Metro: Last Light, Very High, SSAA Hitman: Absolution, Ultra, 8x MSAA Sleeping Dogs, Extreme
69.7FPS 75.1FPS 77.3FPS 58.6FPS 66.6FPS
78.7FPS 89.7FPS 94.2FPS 75.3FPS 87.6FPS
31.0FPS 32.5FPS 33.5FPS 33.5FPS 36.5FPS
26.5FPS 31.5FPS 33.5FPS 27.0FPS 30.5FPS
31.4FPS 33.4FPS 33.7FPS 32.4FPS 36.7FPS
39.1FPS 44.9FPS 48.0FPS 40.8FPS 46.8FPS

For a card that"s costs so much less compared lớn the opposition - even the GeForce GTX 670 - the Radeon HD 7950 hands in some fairly svào figures. Nvidia absolutely dominates in BioShoông xã Infinite in particular, but the gap closes a touch in Tomb Raider và suddenly the HD 7950 looks much more competitive sầu on every other benchmark we have sầu. It"s only a shame that we didn"t have sầu the GeForce GTX 660 Ti khổng lồ hand to see how Nvidia"s cheaper offering would have stacked up.

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However, bearing in mind the much wider memory bus & the higher power requirement, it"s fair lớn say that the HD 7950 is effectively brute-forcing its way to lớn success here - a pattern that sees the thẻ push to higher levels still once the 1020MHz core/1370MHz RAM overcloông chồng kicks in. Here we"re seeing results that push the 7850 up to lớn GTX 680 levels - indeed, in a couple of cases we"re seeing the công nghệ reach the giddy heights of GTX 770 performance. Chances are you"d see similar performance from the Gigahertz Editions of the HD 7950 released in recent times.

Next up, we re-ran those tests, this time upping resolution to lớn 2560x1440, but knocking down the overall quality presets down a single notch. The idea here is to judge the card"s suitability for ultra-high resolutions while at the same time accepting that ultra-chất lượng settings at such a challenging level are only really attainable on multi-GPU set-ups. We also ran Hitman: Absolution"s benchmark at both 8x MSAA và 2x MSAA to lớn once again demonstrate just how much power is absorbed by extreme multi-sampling và that perhaps it"s time lớn embrace more innovative sầu anti-aliasing solutions.

As the table below demonstrates, the results speak for themselves. The yawning chasm in performance we saw between AMD và Nvidia in BioShock closes up nicely, và while Tomb Raider results aren"t so svào, the Radeon HD 7950 puts in some highly creditable figures in almost all of our other remaining metrics.

"The results are pretty clear - Nvidia is more power-efficient và beats the HD 7950 in performance, despite the narrower RAM bus - but you vị end up paying more for the privilege."

2560x1440 GTX 670 GTX 680 GTX 770 Radeon HD 7950 Radeon HD 7950 (OC) BioShoông xã Infinite, DX11 Very High Tomb Raider, High, FXAA Metro 2033, High, 4x MSAA Metro: Last Light, High, No SSAA Hitman: Absolution, High, 8x MSAA/2x MSAA Sleeping Dogs, High
62.9FPS 69.0FPS 74.7FPS 59.9FPS 68.4FPS
76.5FPS 82.8FPS 93.1FPS 68.4FPS 78.4FPS
24.0FPS 25.0FPS 26.5FPS 26.5FPS 30.5FPS
34.0FPS 39.5FPS 43.0FPS 35.4FPS 40.0FPS
21.2FPS/ 40.3FPS 21.8FPS/ 41.8FPS 22.8FPS/ 45.2FPS 21.8FPS/ 40.3FPS 25.6FPS/ 48.7FPS
46.5FPS 52.7FPS 56.8FPS 48.1FPS 55.3FPS

Radeon HD 7950 3GB: the Digital Foundry verdict

In the rush lớn nhận xét the lathử nghiệm and greatest, we often forget that vendors have sầu plenty of existing inventory that they need lớn sell - last year"s top-tier hàng hóa becomes this year"s attractive sầu bargain buy. In the case of the Radeon HD 7950 3GB, we see prices being pressured on two fronts - this is a graphics card that is over a year old now, that has progressively lost its sheen as new Nvidia products hit the market. Worse still for AMD, in the here và now it has absolutely nothing to lớn replace it. Seemingly the only way to keep competitive is lớn slash prices: the brutal reality for AMD is that the HD 7950 has lost over a third of its retail price over the last year - bad news for the company perhaps, but good news for gamers with an eye for a bargain.

While the HD 7850 và HD 7870 are generally considered the default AMD choices in terms of price vs. performance, we think that the additional power on offer here in combination with the bonus "freebie" Clip RAM makes it the better piông chồng. The question of how effective the extra memory will be once next-gene consoles arrive sầu is something of an unknown at the moment. In truth, at 1080p resolutions the vast majority of games right now run identically on both 1GB and 2GB editions of the evergreen Radeon HD 7850 - with only Skyrim"s ultra settings seeing a radical shift in performance between the two cards. Certainly in the short term - where initial next-ren console titles will most likely be PC-orientated anyway - not much will change. But it may well be the case that the highest-quality texture settings will be off the table even for 2GB cards should the development focus puts consoles first.

In the meantime, the focus shifts bachồng to Nvidia & what it has planned for the price point the HD 7950 currently occupies. On that point, we have the feeling we"ll be finding out sooner rather than later.

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About the author


Richard Leadbetter

Technology Editor, Digital Foundry| digitalfoundry

Rich has been a games journadanh sách since the days of 16-bit & specialises in technical analysis. He"s commonly known around earlsdaughter.com as the Blacksmith of the Future.