3 screen GPU review

[mortenpg]

I am missing a review comparison for GPU on 3 screens. all test are normaly made with 1 screen. and Linus states that GPU in SLI does not perform because it does not give you more VRAM.

 

I am playing Project cars on 3 screens 5990x1200. can I regard this as close to a 4K resulution in the tests I se?

I would really like to se Linus do a test of different grafic cards for this purposes.

 

What do I "need" if I want to get a better setup:

 

I have a 6990 card. running at 30+ FPS in the game with most settings on medium. 

in game I can se.

GPU1 running 98%

GPU2 running 99%

using 2500-3700 MB VRAM. (arcording to Linus video I should only be able to use 2 GB ??? as data is just dublicated).

 

As I understand the video I will not get a benefit to have another 6990 in CF if the VRAM is the limitation?

I am confused. Can You explain?

[minibois]

-snip-

Alright.

Crossfiring could give better performance, but if VRAM is limiting, it wont help much.

There are GPU benchmarks with triple screen, but usually reviewers only do 1080p, 1440p and 4K nowadays, because triple 1080p (or 1920x1200) is not that common.

Triple 1920x1200 = 6.912.000 pixels

and 4K = 8.294.400

So 4K and triple 1920x1200, should be about the same pixels but can't exactly compare them, since with triple screens you also render next to you.

Will try to find some triple screen Project Cars benchmarks

 

EDIT: a reliable benchmark site I often visit didn't do any triple screen benchmarks. They used to do those alongside with 1080p and 4K, but now they have those 2 and 1440p.

[mortenpg]

Triple 1920x1200 = 6.912.000 pixels

and 4K = 8.294.400

So 4K and triple 1920x1200, should be about the same pixels

This was also my idear. that I nedded second eyes on. Mabye Linus will test the difference one day.

 

But as I se it; my limitation is at first the GPU both running at 99% so an additional card will help.

 

Additional:

It is normal for the review to test different games. BF4, Metro ... ect. but I have never seen a racing game in the tests. does anybody know what game of the usual from the tests that I can best compaire with for Project cars or NFS Shift 2? 

[ClownFace1511]

 

I would really like to se Linus do a test of different grafic cards for this purposes.

 

 

                                                                                                    ^

[minibois]

This was also my idear. that I nedded second eyes on. Mabye Linus will test the difference one day.

 

But as I se it; my limitation is at first the GPU both running at 99% so an additional card will help.

 

Additional:

It is normal for the review to test different games. BF4, Metro ... ect. but I have never seen a racing game in the tests. does anybody know what game of the usual from the tests that I can best compaire with for Project cars or NFS Shift 2? 

GPU scaling with 3 GPU's is pretty terrible. Most of the time it only gives 2fps or so more than 2 GPU's, so that is not worth it IMO.

Especially since you are maxing out the VRAM too.

 

I really can't find any triple 1080p benchmarks anymore, so can't compare to 4K..

But you could use Grid Autosport to compare to Project Cars and NFS Shift 2, because Grid is a racing game too

[mortenpg]

GPU scaling with 3 GPU's is pretty terrible. Most of the time it only gives 2fps or so more than 2 GPU's, so that is not worth it IMO.

Especially since you are maxing out the VRAM too.

 

GPU scaling.. I dont understand if you mean that I should use this? is it because it is not worth getting a card more IYO? (6990 or 6970)

 

about maxing the RAM it depends on the track ect. some are as low as 1800Mb others are up to ~3700Mb. 

 

Can anyone tel me: Is the data dublicated? Am I using  900Mb *2 ~1750Mb*2 or 1800Mb ~ 3700Mb. Acording to Linus video it must be the first. 

 

additionaly a crasy idear.; have anyone seen if you can dedicate 1 GPU to the center screen? my idear is that It could be nice to trade some FPS from the side screens to the middle. I dont think this is posible and you somehow had to run the 2 cards not in CF (mabye 2 seperat cards are nedded to do this, if posible)

[minibois]

GPU scaling.. I dont understand if you mean that I should use this? is it because it is not worth getting a card more IYO? (6990 or 6970)

 

about maxing the RAM it depends on the track ect. some are as low as 1800Mb others are up to ~3700Mb. 

 

Can anyone tel me: Is the data dublicated? Am I using  900Mb *2 ~1750Mb*2 or 1800Mb ~ 3700Mb. Acording to Linus video it must be the first. 

 

additionaly a crasy idear.; have anyone seen if you can dedicate 1 GPU to the center screen? my idear is that It could be nice to trade some FPS from the side screens to the middle. I dont think this is posible and you somehow had to run the 2 cards not in CF (mabye 2 seperat cards are nedded to do this, if posible)

GPU scaling is a term used for crossfire and SLI.

If you have 1 GPU and add another, you will only get about a 30% increase or so in fps, but you are adding 100% more GPU (1,3 times more fps, 2 times more GPU's).

With 3 GPU's this is even worse, as it will often result in only 5% or so increase on top of that 30%.

 

And VRAM is not doubled (or tripled) if you have more GPU's.

If you have 3 1GB GPU's in crossfire/SLI, you will have 1GB of usable VRAM. Not 3. 

 

And no idea about the 1 screen per card thing.. Can't imagine it to be honest