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Geforce GTX 780 triple SLI or Radeon HD 7990 quadfire? Which gives better performance.

Last response: in Graphics & Displays
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August 28, 2013 1:34:11 PM

Ok so, both options are at the same price (there's just a 40 to 50$ difference). Which'll give me better performance? I guess 3 780s will give me better performance right? or not? i was going for the three 780s option to start with, but i'm considering the 7990 quadfire option just cuz it has 6gb of ram. the 780 has 3. and please, keep the 690 out of this, since the 7990 beat it spec-wise.

I'm not going to game on anything except my 1920 x 1080 monitor (yup, benq). so, which is going to be the best bang for the buck? and please dont tell me that vram doesn't matter and that 2gb of vram is enough or anything. please. i know it does matter. cuz you can't max out max payne 3 in 2 GBs of ram. and, probably, since gaming has reached 8th generation, there are going to be games that'll need more vram. also, when extremely modded, GTA 4 gives problems with low VR. so, please tell me, which is going to be better. and also, physx does matter to me. a lot. play arkham city and you'll know.

the rest of my PC specs are pretty good comparatively. I got this amazing combo pack: asus rampage iv extreme, intel core i7 3970x, corsair vengeance 16GB 1600mhz ram, all for 1750$! PSU: 1200W. please tell me the best option available. dont wanna regret it later. also, is it true that i can run physx on my cpu? i guess my cpu is powerful enough for that. if yes, then can you tell me in detail, how to do it, or perhaps give me a link? thanks for your time

additional info: i literally was gonna go for three titans cuz my previous 680 gave me some horrible problems with my 5760 x 1200 display. but i noticed that its to much of an overkill and waste of money (and i'm not Bill Gates, it puts a dent on my budget), now i know that the ridiculous resolution was my problem. maybe with this 1920 x 1080 display, i can put the AA to 8x and finally get rid of those jagged edges.
August 28, 2013 1:42:14 PM

2GB of VRAM is fine for 1080p, VRAM usage isn't going to go up alot just because of the new consoles, MSAA isn't the standard with DX11, there are better solutions that use less VRAM. Also the 7990 is a 3GB card, VRAM does not stack in Crossfire SLI, no matter how many 7990's you put together you only get 3GB.

Anyways, for 1080p any of those are so much overkill its ridiculous, with the thread title I was expecting triple 1440p or something. If you are going with just 1080p then 1x 780 is more than enough.

Quadfire doesn't work, and 7990's in Crossfire aren't as fast as even 2x 780, so the choice is obvious, but thats an unnecessary amount of money to put down for 1080p, get 2x 780 and a 1440p monitor or something.

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August 28, 2013 1:44:32 PM
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CF is broken .....

http://www.pcper.com/reviews/Graphics-Cards/Frame-Ratin...
http://www.anandtech.com/show/6857/amd-stuttering-issue...
http://www.tomshardware.com/reviews/graphics-card-bench...

And the 13.8 Beta driver fix didn't quite cut it

http://hardocp.com/article/2013/08/01/amd_catalyst_138_...
http://www.hardwareheaven.com/reviews/1804/pg1/amd-cata...

Quote:
So what do we make of that lot? Well overall it's hard not to be a little underwhelmed. There are aspects where initially it looks like progress has been made, Battlefield 3 for example where the 13.8 driver ends its run better than the 13.6 but the new version is a little worse to begin with. We must bear in mind though that Battlefield 3 has a pretty low latency anyway so it's not a huge issue. Where we would have liked to see an improvement is Metro: Last Light but sadly framerates decreased and we saw larger spikes in frametimes on 13.8 which was disappointing. Really though one of the key titles which needs frametime improvements is Crysis 3 (on NVIDIA and AMD hardware) but that remains pretty much the same on the new 13.8 driver which is a shame as in this game the micro stutters are very noticable to the naked eye.

Overall we have to say this release doesn't deliver what we would have expected and to be honest we are not sure why AMD has rushed to deliver it in a state where there are no significant real world improvements in key titles... or why they felt waiting until all resolutions and DX9/OpenGL were ready wasnt worthwhile. It could be that there is an improvement in tests which use FCAT technology to record driver improvements but until the gains are replicated in real world use for games such as Crysis 3 we see no reason to change our conclusions from recent reviews.


PhysX on CPU and PhysX on GPU are two different things

This is GPU PhysX ... hard to follow actually except for the side by side split screen portions
http://www.youtube.com/watch?v=6GyKCM-Bpuw

From ukharwareinfo.com

Crysis 2 Ultra Hi res AA @ 1920 x 1080

7990 - 116.6 fps
780 SLI - 120.2 fps
770 SLI - 99 fps

Crysis 3 Ultra Hi Res AA @ 1920 x 1080

7990 - 60.9 fps
780 SLI - 83.5 fps
770 SLI - 66.9 fps

Metro 2033

7990 - 73 fps
780 SLI -85 fps
770 SLI - 63 fps

The reviewers consensus for years has always been to stay away for more than 2 GPUs in CF and now that it's been shown, even with just one 7990, that the problems still exist, I wouldn't even think about two 7990s.

Id get two MSI N770s and be done with it ....gives ya 60 fps in everything....anything else is just benchmark bragging rights .... and in practice CF still has its lag and stuttering issues

If ya wanna go nutz, buy three Asus 144 Hz screens .... this will show ya how the 760, 770 and 780 do 1=with one, two and three card configurations ... and I'd do 4GB models for the 3 screen setup

http://uk.hardware.info/reviews/4632/6/geforce-gtx-700-...
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August 28, 2013 1:56:46 PM

Of course, your plans are highly questionable. So much GPU power for a single 1080p screen is going to go to waste. But, fair enough, I'll play along.

First and foremost, it has been definitively proven that Quad-Crossfire dual 7990's simply does not work. Due to the design of the fans, a heat vortex is created that pushes the GPU's over their thermal limit and causes the clock speeds to throttle. Full review here:
http://www.tomshardware.com/reviews/radeon-hd-7990-cros...

Quote:
"The information we’re bringing to light flat-out kills any reason to pair Radeon HD 7990s up in the same system. And this is the best-case chassis, recommended by AMD. It only get worse/hotter from there.... When it launched, a generous eight-game bundle had me on the fence about the 7990’s prospects. But after spending time evaluating its thermals and acoustics (to say nothing about its crashes and performance hiccups in CrossFire, which could become a story unto itself), I can’t think of one reason to recommend 7990 to a friend. And, at the end of the day, that’s what this job is all about."
http://www.tomshardware.com/reviews/radeon-hd-7990-cros...



And no, you won't get playable framerates on any PhysX game using your CPU, with the possible exception of Borderlands 2 at Medium settings. You simply need an Nvidia GPU with a high CUDA core count to run GPU-accelerated PhysX the way it was intended.

So, I guess we can and should just stop there and move on to how many GTX 780s do you need for a single 1080p screen. Of course, you only need one, but if you really need to have the absolute best overkill system, then a pair in SLI will do fine. Three GTX 780s will offer no benefit over a pair at 1080p resolution.
August 29, 2013 3:36:38 AM

17seconds said:
Of course, your plans are highly questionable. So much GPU power for a single 1080p screen is going to go to waste. But, fair enough, I'll play along.

First and foremost, it has been definitively proven that Quad-Crossfire dual 7990's simply does not work. Due to the design of the fans, a heat vortex is created that pushes the GPU's over their thermal limit and causes the clock speeds to throttle. Full review here:
http://www.tomshardware.com/reviews/radeon-hd-7990-cros...

Quote:
"The information we’re bringing to light flat-out kills any reason to pair Radeon HD 7990s up in the same system. And this is the best-case chassis, recommended by AMD. It only get worse/hotter from there.... When it launched, a generous eight-game bundle had me on the fence about the 7990’s prospects. But after spending time evaluating its thermals and acoustics (to say nothing about its crashes and performance hiccups in CrossFire, which could become a story unto itself), I can’t think of one reason to recommend 7990 to a friend. And, at the end of the day, that’s what this job is all about."
http://www.tomshardware.com/reviews/radeon-hd-7990-cros...



And no, you won't get playable framerates on any PhysX game using your CPU, with the possible exception of Borderlands 2 at Medium settings. You simply need an Nvidia GPU with a high CUDA core count to run GPU-accelerated PhysX the way it was intended.

So, I guess we can and should just stop there and move on to how many GTX 780s do you need for a single 1080p screen. Of course, you only need one, but if you really need to have the absolute best overkill system, then a pair in SLI will do fine. Three GTX 780s will offer no benefit over a pair at 1080p resolution.


thanks, i guess three 780s would really be an overkill, but i dont think i'll be changing the cards for atleast 3 years. its just for a little future proofing. as we all saw, how nvidia cards got rusted with tressFX on TOMB RAIDER, i'm just getting three 780s for, just in case, if there are going to be games which use direct compute more than TOMB RAIDER. you would tell to get an AMD then, but cant leave nvidia just because of physx, FXAA, and their new TXAA. and gk110 GPUs seem to have improved on the compute performance problem with nvidia.

August 29, 2013 3:36:39 AM

17seconds said:
Of course, your plans are highly questionable. So much GPU power for a single 1080p screen is going to go to waste. But, fair enough, I'll play along.

First and foremost, it has been definitively proven that Quad-Crossfire dual 7990's simply does not work. Due to the design of the fans, a heat vortex is created that pushes the GPU's over their thermal limit and causes the clock speeds to throttle. Full review here:
http://www.tomshardware.com/reviews/radeon-hd-7990-cros...

Quote:
"The information we’re bringing to light flat-out kills any reason to pair Radeon HD 7990s up in the same system. And this is the best-case chassis, recommended by AMD. It only get worse/hotter from there.... When it launched, a generous eight-game bundle had me on the fence about the 7990’s prospects. But after spending time evaluating its thermals and acoustics (to say nothing about its crashes and performance hiccups in CrossFire, which could become a story unto itself), I can’t think of one reason to recommend 7990 to a friend. And, at the end of the day, that’s what this job is all about."
http://www.tomshardware.com/reviews/radeon-hd-7990-cros...



And no, you won't get playable framerates on any PhysX game using your CPU, with the possible exception of Borderlands 2 at Medium settings. You simply need an Nvidia GPU with a high CUDA core count to run GPU-accelerated PhysX the way it was intended.

So, I guess we can and should just stop there and move on to how many GTX 780s do you need for a single 1080p screen. Of course, you only need one, but if you really need to have the absolute best overkill system, then a pair in SLI will do fine. Three GTX 780s will offer no benefit over a pair at 1080p resolution.


thanks, i guess three 780s would really be an overkill, but i dont think i'll be changing the cards for atleast 3 years. its just for a little future proofing. as we all saw, how nvidia cards got rusted with tressFX on TOMB RAIDER, i'm just getting three 780s for, just in case, if there are going to be games which use direct compute more than TOMB RAIDER. you would tell to get an AMD then, but cant leave nvidia just because of physx, FXAA, and their new TXAA. and gk110 GPUs seem to have improved on the compute performance problem with nvidia.

August 29, 2013 7:01:48 AM

waqaransari said:
thanks, i guess three 780s would really be an overkill, but i dont think i'll be changing the cards for atleast 3 years. its just for a little future proofing. as we all saw, how nvidia cards got rusted with tressFX on TOMB RAIDER, i'm just getting three 780s for, just in case, if there are going to be games which use direct compute more than TOMB RAIDER. you would tell to get an AMD then, but cant leave nvidia just because of physx, FXAA, and their new TXAA. and gk110 GPUs seem to have improved on the compute performance problem with nvidia.


Does the fact the Crossfire is broken enter into the equation ? Lightboost is also something to by happy of having the benefit of.
November 10, 2013 12:08:20 PM

You saved me a bunch of money and trouble. Why does AMD make the crap run so freakin hot??? I mean it's like one product after another! I wan't to like AMD so bad. Well I guess I will wait to see what mantle does before I go team red, otherwise it's green for me!
November 10, 2013 4:48:43 PM

That sounds great. Why don't you pick a Best Answer and close out the thread?
!