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My experience from SLI GTX570s to single 7970 in BF3 - Page 11

post #101 of 106
Quote:
Originally Posted by evensen007 View Post

Well, I installed the 7970 last night and lo and behold... I managed to get up to 1800mb of Vram usage in Skyrim with all my texture packs installed.

PROOF OR IT'S A LIE!

I'm finding the same results on test 6950 2GB. Just around ~1.8gb of VRAM with extra textures loaded for Skyrim in 1920*1080.

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post #102 of 106
Read this entire thread. A bit of tension but at least for the most part aside from a couple people it's been respectful. I hear both sides of this coin and both have some valid arguments.

However explain to me why in game benchmarks on 1920x1080p a 1.2GB VRAM card is sometimes beating a 2.0GB card in frames per second? thinking.gif

451

700

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700

Let's also put things into some perspective on this thread. The AMD 7970 is new 28nm architecture and is a leap from previous technology. As past leaps in tech have shown it's a larger performance gain as opposed from a refresh line. I'd expect less performance gains going from 7000 to 8000 series. The 7970 is a success and I expect nothing less from Nvidia's next offering. Kudos for AMD for being first out of the gate and doing a great job of it. thumb.gif

Also it's not about whether it's Nvidia vs AMD but more about VRAM regardless of brand and if VRAM intensive games actually take from FPS on single 1920x1200 resolution or less when in maxed game settings with all eye candy turned on. We all know that the larger the resolution the more VRAM does become king and I believe we all concur with that as it's required being spread across three screens. No argument there.

So the debate sparked by OP's words that his finding micro stutter in SLI or Crossfire for sake of argument on 1.2GB set up, seemed to have sparked some debate. His findings are valid to him, his choice of words to describe it not entirely factual to all users with less VRAM.

I've found I'm in the 45-50FPS area on BF3 Ultra 4xMSAA and AB has shown me 1.425GB VRAM usage in 16vs16 multiplayer. BF3 if I'm not mistake has not addressed the well known memory leak bug ( I could be wrong ) and that might be why it's using what it can eat yet not effecting performance on GPU's that have enough processing power to plow through the VRAM hump.

Now on the other side of the coin what we know from VRAM holds true that more VRAM should in theory yield higher FPS. Seems the 1920x1200 resolution monitor set ups are not as dependent of the VRAM with sufficient processing power and creates this quandary of debate.

VRAM as we all know is where the active instruction reside to store information to be rendered. The larger the capacity of the VRAM the more info it can retain at a given time to retain info for the processor to read and steps through these instructions. These operations are needed to perform calculations to render complex display functions, and when all the calculations needed to display a "frame" of data are complete then the data is sent out to the display. The more instruction the VRAM can hold the quicker the CPU can help process these instructions.

CPU / GPU combinations should also be taken into consideration as to why we see the variances from person to persons experience playing the same game with same VRAM.

Personally I'm slowing changing my opinion. I believe that having more VRAM doesn't hurt and slowing siding with going with more VRAM as I foresee games being more VRAM hungry coming up within the next year in order to play maxed. As of yet I wouldn't suggest to anyone with 1.2GB to throw away your cards in the trash just yet if your doing fine. Those with lesser GPU's or VRAM can still have playable frame rates but will need to turn down settings.

Well that's my two cents. *Arizonian steps off soap box* redface.gif
     
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post #103 of 106
Thread Starter 
Most of those review charts are most likely single player. My 570s had no problem with that at 4xMSAA at all. It only stutters in large games, and it's not micro, it's stutter stutter. The 570s have a lot of power, I am not denying that. If you put the 570 against the 2gb cards in its range where it's not a vram intensive game, the 570 will probably win out.

At 1920z1080, on my new 7970, I recorded a 1920mb vram usage. That is a lot.

If you have a 570 now, by all means keep it. But if you want the best, they surely are not. I wanted one of the best setups and they weren't delivering.
post #104 of 106
Quote:
Originally Posted by WiL11o6 View Post

Most of those review charts are most likely single player. My 570s had no problem with that at 4xMSAA at all. It only stutters in large games, and it's not micro, it's stutter stutter. The 570s have a lot of power, I am not denying that. If you put the 570 against the 2gb cards in its range where it's not a vram intensive game, the 570 will probably win out.
At 1920z1080, on my new 7970, I recorded a 1920mb vram usage. That is a lot.
If you have a 570 now, by all means keep it. But if you want the best, they surely are not. I wanted one of the best setups and they weren't delivering.

Why stop with one tongue.gif

Just picked up 2x 7970s to replace my 2x 570s and I'm playing BF3 @ Ultra FXAA High, 2x MSAA across 3 screens avging 45-65 fps. No noticeable microstutter or screen tearing. thumb.gif
 
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post #105 of 106
Thread Starter 
I did pick up a second one.

Unfortunately, I cannot get the drivers to work for BF3. People have been trying to help me in the 7970 owners thread. I am still trying to work it out. mad.gif
post #106 of 106
I've just switched from 570 SLI to a single 680 GTX but I must say, I was very close to picking up a 7970. Glad I waited.
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