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So can some explain the 1gb vs 2gb VRAM Debate?

post #1 of 22
Thread Starter 
So I constantly see threads/posts about 1gb vram and 2gb vram and if it actually helps and is useful (Especially in BF3 threads).

But I saw a post awhile back where someone explained that even if the System Monitor Showed that it was using 2gb VRAM.....that the game itself might not actually be using it?

So can someone explain in laymans terms why this is or is not correct?

For reference this is because I bought a GTX 570 over a 2gb 6970 (2gb VRAM vs 1.25 or w/e)
post #2 of 22
http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/47608-effect-gpu-memory-surround-stereo-3d-performance.html

Read this, it should answer your questions smile.gif
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post #3 of 22
The link in my sig has some info.

Basically at higher resolutions more textures are loaded and in order to keep all these textures/high settings/AA to run smoothly you need more VRAM. If you don't have enough VRAM you have to turns things like AA down in order for the game to run smoothly. Like with RAM, more you have, more smoothly multiple programs will run at the same time. With more vram, more textures and detailed can be loaded and run smoothly. smile.gif Simplified version...
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post #4 of 22
Quote:
Originally Posted by derickwm;15476861 
The link in my sig has some info.

Basically at higher resolutions more textures are loaded and in order to keep all these textures/high settings/AA to run smoothly you need more VRAM. If you don't have enough VRAM you have to turns things like AA down in order for the game to run smoothly. Like with RAM, more you have, more smoothly multiple programs will run at the same time. With more vram, more textures and detailed can be loaded and run smoothly. smile.gif Simplified version...
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post #5 of 22
The vram is the place where the card draws/prepares frames, which then get sent out to the monitor.

A lot of games use well over 1GB of this buffer for various reasons (large textures, AA, backbuffering, high resolutions) but the point is, just because they're using more doesn't mean they are rendering more frames per second.

Basically, in a game, if a 2GB card uses 1.2GB and a 1GB card uses 1GB, the 1GB card probably won't perform any differently because it still has space to prepare and send out frames at the same rate.

edit: though I should mention that, when the buffer is full and chokes, it will rely on system RAM, which will result in 1-5fps biggrin.gif
Edited by fluxlite - 10/27/11 at 1:14pm
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post #6 of 22
if a shelf is 6 foot high and your 4 feet tall. You need a step to reach whatever you want to grab.

BUT

if you are 5 feet tall, it's easier to reach without extra needed help.

think of it as VRAM, newer games require more from the card but its gana be some time before everyone catches upto it so 1gb is more than enough for right now.

if ur lookin at a certain card and it has a 2gb with a minimum difference, just grab 2 GB edition. doesn't hurt =D
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post #7 of 22
Yeah, I too was worried about VRAM.

Although the 570 beats the 6970 @1080p ultra in BF3, even though it has less VRAM.
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post #8 of 22
Thread Starter 
So with just 1 monitor at 1080p 1.25 GB VRAM should be okay for the next year or so probably? (Mainly concerned about Skyrim/BF3)
post #9 of 22
You probably won't be able to turn AA all the way up with only 1.25GB. I've heard of BF3 eating VRAM like nobody's business.
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post #10 of 22
Thread Starter 
That's fine. I play on High Settings anyways, I'd rather have the FPS than.....barely noticeable graphics improvements.
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