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

Originally Posted by T}{OR

There was only one guy I saw using a 3GB 580. And he is the only one capable of getting "40 FPS in the dreaded bombers-over-London mission" (settings on medium and high; 1920X1200 resolution). He says it runs silky smooth.

Here is the thread:

http://simhq.com/forum/ubbthreads.ph...3256483/1.html

The game will use up all available VRAM:



So, for me the choice is obvious.

That screen shows a GTX 460 and the game uses around 1GB maybe due to the 1GB GFX card. I should ask the 3GB guy to make such test.

[adonys]

that's exactly what i've asked on the other thread too: we really need someone with a single GPU card with 1.5/2/3 GB VRAM do an AIDA test on IL2 CoD on variou graphics settings.

[Buchon]

There a lot of confusion in this thread about how SLI/Crossfire work.

SLI/Crossfire cards and systems dont share VRAM between GPUs.

So the effective VRAM of a dual GPU with 2 GB is what is assigned to a one GPU.

That mean that in a dual GPU card with 2 GB of VRAM there a 1 GB of effective VRAM becouse, in fact this card are two single cards of 1 GB VRAM.

[camel24hrs]

Vram makes a huge difference in ROF. (I figure this is the closest sim to COD at the moment) In the ROF setup panel it will tell you how much memory you use as you put in your settings. (And checking with MSI Afterburner it is right on the money) With everything set to max 8x Antializing and 8x Anisotropic and all other sttings to the max level I use 56% of my available vram and that is on a 2 gig geforce 560Ti card. All flights are over land and it is really good graphics in this flight sim. ( I get low 40s to high 50s fps with no shutters by the way). Gogamer has April 18th for my shipment date. I have second day air and I will find out then how it does on a 2 gig card. I am not in any hurry as I only had ROF for a couple of months and have been having a blast with it.

When I did get my card I decided to go with the most Vram that I could get on my series of card.......I figured it could never hurt to have it even if I did not need it. And boy I am glad I got it !!!

[Buchon]

Is true that this game is VRAM demanding but Im playing fine with 1 GB of VRAM.

But i guess that the players with 512 VRAM will have problems, the best way to free up VRAM is shoot down AA.

[camel24hrs]

Originally Posted by Buchon

Is true that this game is VRAM demanding but Im playing fine with 1 GB of VRAM.

But i guess that the players with 512 VRAM will have problems, the best way to free up VRAM is shoot down AA.

Like wise in ROF. It doesnt take a 2 gig card to run the sim.....however if you want to run it will all the bells and whistles turned on....then you need more than 1 gig, 1.5 at least.

[adonys]

Originally Posted by Buchon

There a lot of confusion in this thread about how SLI/Crossfire work.

SLI/Crossfire cards and systems dont share VRAM between GPUs.

So the effective VRAM of a dual GPU with 2 GB is what is assigned to a one GPU.

That mean that in a dual GPU card with 2 GB of VRAM there a 1 GB of effective VRAM becouse, in fact this card are two single cards of 1 GB VRAM.

I was saying that DUAL GPU (590 GTX & 6990) cards might have their VRAM shared. We need to check the vendor's specifications for that.

[Armatian]

No mem is shared, is duplicated, dual gpu cards are the same like one gpu card with crossfire/sli conection inside the card.

[Kankkis]

Originally Posted by Armatian

No mem is shared, is duplicated, dual gpu cards are the same like one gpu card with crossfire/sli conection inside the card.

True, that's the reason why my game is sturrering like hell, i got 5970 2gb but really it uses only 1gb, there is people who's getting allmost smooth gameplay with over 1gb.

Weird thing is that even i play all setting about min, i got stuttering and my hd loading, how the hell game can use so much vram even low detail?

Kankkis

[louisv]

SLI stands for Scan Line Interleaving...

Simply put if you have two cards in sli, one card does the top part of the screen and the other does the rest. Logically this means that the two memories must have ALL the information in each.

Double cards are a compact SLI package, that is all.

Louis