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[PCGH] GPU performance index 2015: 16 Radeon and Geforce models in benchmark comparison - Page 5

post #41 of 165
Quote:
Originally Posted by phenom01 View Post

So If Nvidia isnt strapped for bandwidth@ 4k and has every other possible advantage does that not mean nvidia has won this round? Or are you touting AMD's 8'k superiority? thumbsupsmiley.png
Nvidia has a 25% deficit at bandwidth, albeit an 8% advantage at pixel shading - Titan X, notwithstanding - as soon as Directx 12 comes aboard we might see its machinations.
@Digidi has another post which has made earthen mortals like myself understand what rasterization is about. I suppose his post means 290X and, by virtue of having the same architecture, Fury X can top 10861h * 6109v(8K dual screen) and still not be rasterizer bottlenecked @36 fps.
Post #862.
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post #42 of 165
Quote:
Originally Posted by mtcn77 View Post

Nvidia has a 25% deficit at bandwidth, albeit an 8% advantage at pixel shading - Titan X, notwithstanding - as soon as Directx 12 comes aboard we might see its machinations.
@Digidi has another post which has made earthen mortals like myself understand what rasterization is about. I suppose his post means 290X and, by virtue of having the same architecture, Fury X can top 10861h * 6109v(8K dual screen) and still not be rasterizer bottlenecked @36 fps.
Post #862.

Well I take theoretical performance in Gflops on both Nvidia and AMD as a good indicator of theoretical shader performance.

These numbers are heavily in favor of AMD, but in case of AMD I would rather stick to my R9-290x then going for FuryX. Even when FuryX has HBM memory with vast memory bandwidth, it still has just 64 ROPs which seems to be unnecessary bottleneck for overall performance - especially when compared to Nvidias. In case of Nvidia it seems they put far too many ROPs, and too few compute units.

The test from the first post is slightly biased by used frequencies and gaming titles they picked, but overall the test only confirms my initial ideas about errors in latest Nvidia and AMD architectures, and that information from tech portal are anything, but not neutral.
Edited by Offler - 10/16/15 at 3:42am
post #43 of 165
GCN needs to be fed in Parallel, compute wise, as the compute architecture, of GCN, can mask latency when processing concurrent workloads. This is why we see Star Wars Battlefront, even though it isn't DX12, performing well on GCN. If you look at Battlefront's multi-threading performance, you will see that the title makes use of several CPU threads.

This is GCN performance without Asynchronous Compute. Asynchronous Compute increases the parallelism of the work loads being fed to GCN for an even greater boost in performance.

As games become more heavy, in terms of compute, we will be noticing this trend with GCN products surpassing Maxwell 2 products. This is inevitable because devs are moving towards a more compute oriented focus as well as a higher degree of concurrent compute workloads. SIGGRAPH 2015, GDC2015 and a whole slew of developer conferences have discussed this topic at great lengths. Taping into the concurrent compute performance of GCN is central in taping into the potential performance of the PS4 and XBox One.

Of course we have Pascal and Greenland arriving in Q2 2016 but for AMD GCN users of Hawaii and Fiji products, they will be enjoying higher performance than users of Maxwell 2 based products. Users who adopt Pascal and Greenland will eclipse both, of course. There's no way to tell if Pascal or Greenland will be faster because Greenland is a wild card, Pascal we can make assumptions for but Greenland is a new ISA.
Edited by Mahigan - 10/16/15 at 4:04am
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post #44 of 165
Quote:
Originally Posted by phenom01 View Post

So If Nvidia isnt strapped for bandwidth@ 4k and has every other possible advantage does that not mean nvidia has won this round? Or are you touting AMD's 8'k superiority? thumbsupsmiley.png

I think he is saying why is Nvidia is driving a Lambo and AMD is driving a Fiat, so why is the Fiat so close in a race?
post #45 of 165
Quote:
Originally Posted by DNMock View Post

I think he is saying why is Nvidia is driving a Lambo and AMD is driving a Fiat, so why is the Fiat so close in a race?
This discussion stemmed when I contested saying AMD can easily turn the tables around with more msaa(sorry about not being specific previously).
Eqaa is good and doesn't consume vram. Does Nvidia still have the csaa option in the driver, or did it somehow get lost in translation in newer releases...
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post #46 of 165
Quote:
Originally Posted by DNMock View Post

I think he is saying why is Nvidia is driving a Lambo and AMD is driving a Fiat, so why is the Fiat so close in a race?

Its more like comparing Lambo with a Ferrari, and discussing which of the car(d)s has better acceleration or higher top speed and what matters more. Some people are arguing about short run (current game titles) some people are arguing about long run (using the same card more than 2 years for not yet released games/APIs).

Nvidia will be good for the short run, AMD for the long run, and discussion which card is better then rely only on your own opinion what matters to you as an user.

TBH a 10% difference, with help of slightly higher OC on Nvidia while having 35% more horsepower is really not impressing me. For now its still true that higher fillrate = higher graphic performance, while shader performance is still secondary, and CPU power became tertiary long ago. But importance of shader performance and fillrate may switch with more complex rendering...
post #47 of 165
Good to see the 980 still smashing the 290x and beating the 390x by a good amount which is odd considering the 390x is a 'new' release
post #48 of 165
For the love of god don't acknowledge math. You will get crapped on by phoenix so bad you will give up at life.
post #49 of 165
Price/performance goes to crossfire R9 390 vanilla. It's less than the cost of the 980 Ti, and should get 50% more performance.

Of course that is twice the wattage, but you are still getting at least half a performance bump. Will run 4k just fine.
    
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post #50 of 165
Most boring and ancient card award goes to 390/390x
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