VRAM Usage - 6970 (2 GB) vs. GTX 580 (1,5 GB) vs. GTX 580 (3 GB)

[doghous3]

@Slechtvalk

The HD5970 is a duel GPU card. Each GPU is assigned 1Gb of RAM.

I can confirm that CoD does not invoke the second GPU. Hopefully the upcoming patches will resolve this.

[Kankkis]

Originally Posted by Slechtvalk

this is setup picture from someone with 5970 (2 gig memory), when i use same settings (with my 1 gig memory card) you see video memory usage over 100%, and he's only using 51% of his memory (its says on picture below) which means he does got 2 gig video memory?

And why would ATI sell that card saying it has 2 gig when you only can use 1 gig anyways?

I have 5970 2gb too and same 51%

But this is truth, games only use that 1gb, maybe rof laucher see that 2gb wrong way, my rof is totally smooth with full settings.

[Slechtvalk]

Originally Posted by doghous3

@Slechtvalk

The HD5970 is a duel GPU card. Each GPU is assigned 1Gb of RAM.

I can confirm that CoD does not invoke the second GPU. Hopefully the upcoming patches will resolve this.

But why as you see on picture I posted his memory usage is only 51% (with his 5970 card) while my 1 gig card with same settings is using over 100% video memory?

[Slechtvalk]

Originally Posted by Kankkis

I have 5970 2gb too and same 51%

But this is truth, games only use that 1gb, maybe rof laucher see that 2gb wrong way, my rof is totally smooth with full settings.

What does GPU-Z says when you run a(nother) game? In second tab it will show how much video ram is used.
http://www.techpowerup.com/downloads...-Z_v0.5.2.html

[Kankkis]

Originally Posted by Slechtvalk

But why as you see on picture I posted his memory usage is only 51% (with his 5970 card) while my 1 gig card with same settings is using over 100% video memory?

That s good question, i don't know, i think because windows see it 2gb that's the reason, but im sure games uses only 1gb memory, i mean they uses 2gb but there is both memorys with same data, working likely somehow that RAID hdd's, so if faster that way.

Kankkis

[Kankkis]

http://www.hardocp.com/article/2010/...b_performance/

The Radeon HD 5970 is AMD’s "fastest" video card. This is not a single-GPU video card like the Radeon HD 5870. The Radeon HD 5970 video card consists of two Radeon HD 5870 (down-clocked) GPUs connected via CrossFireX on a single board. While both GPUs retain all the specifications internally as a Radeon HD 5870, the performance has been reduced by core frequency reduction and memory frequency reduction. But worth mentioning is that many people find the 5970 very easy to overclock by large margins. There is also only 1GB of GDDR5 available per GPU. This memory video RAM limitation can cause high resolutions with antialiasing to run out of local video memory, since memory is not shared on the video card. Each GPU needs its own frame buffer space. The only way to fix this issue is to use more memory per GPU, but the 5970 doesn't have it.

In our evaluation of the GeForce GTX 580 last week, we did not compare it to the Radeon HD 5970. The reason being is that pricing on the 5970 was higher when we began the evaluation process by a full $160. The 5970 ended up being directly comparable to the GTX 580's pricing towards the end of our process. The GeForce GTX 580 is currently going for $499 online. The Radeon HD 5970 can be had now for $469.99 after $30 MIR. This is an excellent deal compared to past pricing, and we wanted to see how performance stacks up against the new GTX 580.

[Triggaaar]

Originally Posted by doghous3

I can confirm that CoD does not invoke the second GPU. Hopefully the upcoming patches will resolve this.

I don't think they're planning to address SLI in this patch. I think it's another month or two.

Originally Posted by Kankkis

The Radeon HD 5970 is AMD’s "fastest" video card.

Really? What happened with the 6990?

[Wolf_Rider]

Originally Posted by Hecke

doesn't make any sense for me 'cause I want to play the game on high to full settings and I am sure that my current card (GTX 285 1GB) first of all has not enough VRAM and secondly doesn't have enough computing power.

It would be great if the people that have a 2 GB card could test how much of VRAM is used on maxed out settings and 1920x1080.

But thanks madrebel for your numbers.

eVGA Precision here, was indicating 800 ~ 900Mb on a 460 1024Mb. Curiously, it was showing that number for both my 460's (SLI)

[Kankkis]

Originally Posted by Triggaaar

I don't think they're planning to address SLI in this patch. I think it's another month or two.

Really? What happened with the 6990?

it's really new card, article is older

[squidgyb]

Just tried a quick flight around London in a spit, max settings apart from in game AA, and with a GTX580 it appears to be using as much VRAM as it can grab hold of - started the flight at ~1420Mb, and crept up to ~1500Mb. It was a quick test, so I didn't check framerate or anything. I do have the "noSSAO" mod running, as well as a RAM drive setup - the flight was pretty smooth throughout, but there are still obvious stutters.

There's a particular set of fuel containers close to the shore on one of the bends of the Thames that when you shoot it it flattens buildings around it for a good few 100 meters - that really brings the fps down to a slideshow for a minute or so.

Specs, for those who want to know;

i920 @ 4Ghz
24Gb 1600MHz 9-9-9-25 2T
6Gb RAM drive with steam/CoD installation & 6Gb fancy cache
GTX580 1536Mb @ Stock

Trees and buildings still cause stutters, and for a decent flight while minimising (I've not had a completely stutter free flight, even on lowest settings) the stutters, I go for all max except buildings and trees on medium.

BTW, Triggaaar? Same Trig from clunk.org.uk?