So in my laptop I have an HD5730M and it's initial amount of VRAM is 1024 MB. I have 4 GB of RAM but the GPU is borrowing basically like ~1.5 GB so VRAM is around like 2768 MB or something, so I basically have like 2.5 GB of RAM and VRAM each.
I wanted to know what would be the optimal extra amount of RAM to grant the GPU to use as VRAM.
20th November 2007
The GPU doesn't need even close to 1.5GB unless you're trying to run hires textures at ridiculously high screen resolutions. 1GB should plenty.
Well... usually I've never pushed past 1280x720 (I thought it looked good enough even though there was some minor pixelation, but only if I paid attention to it).
Although in most modern games I've rarely even hit that as I prefer graphical effects (better particles, lighting, shadow effects,etc.) so I usually have to cut down on resolution to 1024x768 or less (not too much though, I don't want to play ugly old 800x480; just one or two options down at most) to get playable fps (at least in games like the first Crysis). I should note that this is the case only with mods that introduce a very large amount of new elements on the game map or with games (such as Oblivion) which are fairly old (approaching or older than 5 years) and don't seem to be very well optimized for current hardware.
But there is the matter that I want to try to get several of my games to look as photo-realistic as possible while still maintaining playable FPS. Now whether that is through mods or the game itself depends on the game but most of the time it is mods and that especially involves Hi-res texture packs. I've only tried this with Crysis 2 but I did have to bring the resolution down by a lot. And I suppose the end result wasn't really satisfying as the resolution was low enough that the Hi-res texture pack didn't matter anyway. Then again the mod did introduce a lot of other graphical effects as well (check Blackfire's mod 2 for Crysis 2).
(*NOTE: ALL of the resolutions I am referring to are and will be widescreen, just so you know *NOTE 2: ALL these obsevations have been made with the 1.5 GB extra RAM being used by the GPU).
20th November 2007
I would get a program or sidebar gadget that monitors your video card, specifically RAM usage, watch it while you play the most common games you play, and see how much VRAM you're using. I can't imagine needing even 1GB of VRAM at 1280 x 720. You'd probably slow down from lack of GPU speed sooner than lack of VRAM.
VRAM to res ratios are MUCH more important than VRAM to RAM ratios, along with factoring in what games you play. Only a select few require exceptionally high VRAM.
A few examples of VRAM:Res ratios and the few games or few times a high VRAM is required would be helpful, if you don't mind.
People say I post too much
1st April 2009
From what I understand, AA can be a deciding factor when it comes to VRAM. The more VRAM you have, the better AA will run.
I could be wrong. Those were just glances at articles, so they may have no bearing whatsoever on this discussion.
random_soldier1337;5582180A few examples of VRAM:Res ratios and the few games or few times a high VRAM is required would be helpful, if you don't mind.
If you glean anything at all from the above thread, pay attention to what is said about benches not telling the whole story. Many people have the misconception that lots of VRAM will automatically boost FPS in texture rich games. For the most part it's more of a frame buffer that minimizes the occasional severe FPS drops, so an average FPS bench won't necessarily show it's benefits. There are however the rare games where you can't even use max settings at 1080p or higher unless you have a huge amount of VRAM, as much as 2GB. GTA IV is such a game, but it's certainly not the best optimized as far as as shadows go.
20th November 2007
Keeping in mind that's at 1920x1080, and he's running 1280x720.
I realize that, but it validates my point that it's more important to talk in terms of VRAM to res, than VRAM to RAM. Also, just because he's running 720p doesn't mean he's not planning to gear up for an eventual higher res display. At 720p however you don't really need high VRAM.