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What are things that normally eats up all your VRAM? - Page 2

post #11 of 23
Quote:
Originally Posted by Aesthethc View Post

Aww man; i had a feeling it had to do with textures too. So say you dont have enough VRAM because of high res textures and AA at the max settings but still enough GPU power; what happens?
This:

900x900px-LL-639ea8c8_1309163052zcB17FAWTk_10_4.gif

1309163052zcB17FAWTk_5_5.gif

Source
post #12 of 23
Thread Starter 
Quote:
Originally Posted by Starbomba View Post

The only game that allocates more than 2 GB of VRAM on my cards is Skyrim, but due to all the mods i have on it. BF3 and other games barely use over 1.7 GB, and even when sometimes they do, it's just a small spike and goes down quickly.

Filling your GPU VRAM does indeed lower your FPS's. GPU's do the same thing as an IGP and allocate a certain part of RAM to themselves only if it is needed, and since RAM is way slower than VRAM (RAM is roughly between 25-32 GBps, VRAM on high end cards is usually well over 200 GBps, especially if OC'd), it will affect the gameplay if a game does indeed use over 2 GB's (in your case).

AFAIK, the refresh rate of a monitor does not affect the VRAM usage, but you need to get more GPU power to drive it. The thing that affects VRAM as well is the resolution of the monitor, like a 1440p monitor will need more VRAM than a 1080p monitor.

I know the refresh rate of a monitor doesnt affect the VRAM usage as it is just the display. I was thinking about the third card to "protect against fps drops from lack of VRAM" ... but which goes into the next quote.....

Quote:
Originally Posted by Booty Warrior View Post

This:

900x900px-LL-639ea8c8_1309163052zcB17FAWTk_10_4.gif

1309163052zcB17FAWTk_5_5.gif

Source

Oh wow that looks incredibly dramatic. Way more dramatic than i was expecting. O_O I was considering a third card to "protect me in case 2GB would not be enough"; but uhh i dont think that will help me if those fps drops are what i may see if i dont have enough VRAM for BF4.

I guess it all just comes down to hoping that 2GB is enough when it comes out for release.

If Battlefield 4 were to require hypothetically "2.1GB" of VRAM... and i am short that 100 MB of VRAM; is it really that dramatic like how it is in those graphs? That doesnt even look playable anymore lol. (Assuming i dont want to turn down the AA or turn down the max settings textures )
post #13 of 23
Quote:
Originally Posted by Aesthethc View Post

Oh wow that looks incredibly dramatic. Way more dramatic than i was expecting. O_O I was considering a third card to "protect me in case 2GB would not be enough"; but uhh i dont think that will help me if those fps drops are what i may see if i dont have enough VRAM for BF4.

I guess it all just comes down to hoping that 2GB is enough when it comes out for release.

If Battlefield 4 were to require hypothetically "2.1GB" of VRAM... and i am short that 100 MB of VRAM; is it really that dramatic like how it is in those graphs? That doesnt even look playable anymore lol. (Assuming i dont want to turn down the AA or turn down the max settings textures )
As mentioned above, in a true VRAM choke your GPU is forced to use system memory and/or your HDD itself across your PCIE lane for loading data, both of which are much slower than the GDDR5 soldered directly onboard. So yes, performance would absolutely tank.

But it is extremely unlikely that you will run into a VRAM choke at 1080p with a 2GB card. Like I said, several games will simply allocate as much as possible. Crysis 2 would notoriously cache as much VRAM was available on the 2GB 6970/6950, even at 1080p. And yet the 1.2GB 570 managed to play it better than either of them.

I really don't think you have anything to worry about.
post #14 of 23
Thread Starter 
Quote:
Originally Posted by Booty Warrior View Post

As mentioned above, in a true VRAM choke your GPU is forced to use system memory and/or your HDD itself across your PCIE lane for loading data, both of which are much slower than the GDDR5 soldered directly onboard. So yes, performance would absolutely tank.

But it is extremely unlikely that you will run into a VRAM choke at 1080p with a 2GB card. Like I said, several games will simply allocate as much as possible. Crysis 2 would notoriously cache as much VRAM was available on the 2GB 6970/6950, even at 1080p. And yet the 1.2GB 570 managed to play it better than either of them.

I really don't think you have anything to worry about.

I actually did not know that it uses system memory or HDD if VRAM wasnt enough. Food for thought biggrin.gif

Thanks; i appreciate your advice and the pictures you showed me. It definitely has me reconsidering getting a third card; because two is already enough. tongue.gif
post #15 of 23
Quote:
Originally Posted by Aesthethc View Post

I actually did not know that it uses system memory or HDD if VRAM wasnt enough. Food for thought biggrin.gif

Thanks; i appreciate your advice and the pictures you showed me. It definitely has me reconsidering getting a third card; because two is already enough. tongue.gif

a second, third, or even fourth card won't help you if you have vram issues.
post #16 of 23
Quote:
Originally Posted by Hattifnatten View Post

I get 2,7gb usage in Bf3 sometimes. How do people get so low usage?

You get 2.7 allocation maybe.
I never see more than 1.4 allocation though even at 1440 on max.
Quote:
Originally Posted by Aesthethc View Post

I know the refresh rate of a monitor doesnt affect the VRAM usage as it is just the display. I was thinking about the third card to "protect against fps drops from lack of VRAM" ... but which goes into the next quote.....
Oh wow that looks incredibly dramatic. Way more dramatic than i was expecting. O_O I was considering a third card to "protect me in case 2GB would not be enough"; but uhh i dont think that will help me if those fps drops are what i may see if i dont have enough VRAM for BF4.

vRAM from multiple cards does not stack. 4 cards will have same vRAM as the lowest vRAM card in the group.

ie. If you have 2 - 2GB cards and a 4GB card, you will only have 2GB of usable vRAM.
Edited by OwnedINC - 8/26/13 at 3:29am
post #17 of 23
dp.
post #18 of 23
Thread Starter 
Quote:
Originally Posted by OwnedINC View Post

You get 2.7 allocation maybe.
I never see more than 1.4 allocation though even at 1440 on max.
vRAM from multiple cards does not stack. 4 cards will have same vRAM as the lowest vRAM card in the group.

ie. If you have 2 - 2GB cards and a 4GB card, you will only have 2GB of usable vRAM
.

I am completely aware of that. Sorry for the misunderstanding if it made it sound like i didnt know this already. thumb.gif

The reason why i wanted multiple cards was to protect from fps drops from "lack of VRAM", but as Booty Warrior suggested; that "lack of VRAM" can constitute to dramatic FPS drops (even to SLI builds) on which the game becomes completely unplayable despite having two 580's which was regarded to be a flagship card in its time....

Hopefully my speculation is that Battlefield 4 wont require more than 2GB of VRAM; and if it did; then i (and probably tons of other people who have equal to or <2GB of VRAM) would need to upgrade to 3GB models in order to keep "that epeen wonderful feeling of maxing out your favorite game ".

My assumption is that it is the former and not the latter. rolleyes.gif
post #19 of 23
I wonder how it works on my hd6990. There's only one Vram usage counter in gpu-z wchich in some heavy games can show well over 2gb Vram usage(3gb+ ish).
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post #20 of 23
Quote:
Originally Posted by Aesthethc View Post

Hopefully my speculation is that Battlefield 4 wont require more than 2GB of VRAM;

BF3 usage wise is no where near the 2GB it just allocates a ton.
So I can't imagine BF4 being beyond 2GB *especially on 1080*
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