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ATI Hd 7950/7970 bios mod thread - Page 68

post #671 of 1284
Thread Starter 
Average about 1-5fps gain in my crossfire set up. But yes its more of ram stage's.
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post #672 of 1284
Thread Starter 
Using slits bios I lost 3-8fps in games. Since rops were cut down
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post #673 of 1284
Whats the best way to test for ROP difference? Higher amounts of AA?
post #674 of 1284
Thread Starter 
Yeah higher amounts of AA show the decrease. He did alot of them for varies cards.
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post #675 of 1284
Alright I'll give it a crack and see what happens
post #676 of 1284
Quote:
Originally Posted by kahboom View Post

Using slits bios I lost 3-8fps in games. Since rops were cut down

Do you know how to re-enable the ROPs? I've wondered if it's just a matter of flipping some bits -- doing a hex-compare of the before and after bioses Stilt worked on, and then tracking down what offsets were changed. I would think that there wouldn't be many spots changed. It's not like he was churning out an entirely different bios (as far as I understand).
Quote:
Originally Posted by Bkpizza View Post

Whats the best way to test for ROP difference? Higher amounts of AA?

I've got every one of Stilt's modded bioses in a zip file, if anyone's interested to test.
post #677 of 1284
Quote:
Originally Posted by Bkpizza View Post

How sure are you guys that he disabled rops? I tried to find comment on it in his original thread but didn't.
I'm running his bios on my card purely for gaming so I should probably just test and see for differences between this and stock.
Thanks

https://litecointalk.org/index.php?topic=12830.msg121827#msg121827
Quote:
The changes:

Bios Core: VER015.041.000.001.00374x (Hawaii A0)

- Elpida B-die performance issue fixed by rewriting the timings and the MC straps correctly.
- Hynix Gemma-die performance improved by rewriting the timings and the MC straps correctly.
- GPU EVV VDDC dependency removed, changed to static voltage levels (VID based)
- Advanced Fan Control (Fuzzy Logic) disabled, changed to look-up table (PWM 20% <50°C / 65% <75°C / 80% <85°C)
- Enhanced the VRM configuration, yielding >5% improvement in VRM efficiency on the medium leaking test samples.
- 50% of the RBs (ROP) shedded, one array (16) from each of the SHs (0/1) to improve the power and the thermal.

I didn't realize Stilt did a number of other tweaks, as well. Anyone know what the net effects of those would be, as far as gaming goes? Would they help/hurt gaming performance?
post #678 of 1284
Quote:
Originally Posted by Coldblackice View Post

https://litecointalk.org/index.php?topic=12830.msg121827#msg121827
I didn't realize Stilt did a number of other tweaks, as well. Anyone know what the net effects of those would be, as far as gaming goes? Would they help/hurt gaming performance?

Ah sweet, thanks for finding that, anyway here are my results... I didn't bother posting maximums since there is a few strange outliers and they aren't really important.

Asus HD7950 TOP V2: 1100/1625

Batman Arkham City: (min/avg) Ultra 1080
Stock: 36 / 64
Stilt: 36 / 64

Hitman Absolution: Ultra 1080
Stock: 26 / 31.68
Stilt: 27 / 33.15

Race Driver GRID 2: Ultra 1080
Stock: 47.11 / 62.71
Stilt: 48.1 / 63.08

Heaven 4.0
Stock: 18.8 / 60.6
Stilt: 8.7 / 61.5

Valley 1.0
Stock: 20.6 / 56.5
Stilt: 24.1 / 56.8

All tests done with max AA, mostly 8xMSAA, valley and heaven were run on medium 1080p to try to make the limit the ROPs.


Doesn't seem to be any difference, maybe my tests are wrong or Stilts memory optimisations countered his cutting the ROPS, i don't know.

EDIT, I'm not sure but I think he may have only cut the ROPS when he modded 290/290x bios?
Edited by Bkpizza - 3/25/14 at 3:55am
post #679 of 1284
Quote:
Originally Posted by kahboom View Post

Average about 1-5fps gain in my crossfire set up. But yes its more of ram stage's.

Thanks for the info. I'm still a little confused on what you actually tweaked -- or rather, how it benefited your performance.

From what you wrote, it seems that you basically
Quote:
Originally Posted by Bkpizza View Post

Ah sweet, thanks for finding that, anyway here are my results... I didn't bother posting maximums since there is a few strange outliers and they aren't really important.

Asus HD7950 TOP V2: 1100/1625

Batman Arkham City: (min/avg) Ultra 1080
Stock: 36 / 64
Stilt: 36 / 64

Hitman Absolution: Ultra 1080
Stock: 26 / 31.68
Stilt: 27 / 33.15

Race Driver GRID 2: Ultra 1080
Stock: 47.11 / 62.71
Stilt: 48.1 / 63.08

Heaven 4.0
Stock: 18.8 / 60.6
Stilt: 8.7 / 61.5

Valley 1.0
Stock: 20.6 / 56.5
Stilt: 24.1 / 56.8

All tests done with max AA, mostly 8xMSAA, valley and heaven were run on medium 1080p to try to make the limit the ROPs.


Doesn't seem to be any difference, maybe my tests are wrong or Stilts memory optimisations countered his cutting the ROPS, i don't know.

EDIT, I'm not sure but I think he may have only cut the ROPS when he modded 290/290x bios?

Interesting, thanks for posting. That heaven benchmark is a curious one.

Could you open GPU-Z and see how many ROPs are enabled with Stilt's bios? I'm not sure if GPU-Z shows the total number of onboard ROPs, or just the number of ROPs enabled. If yours shows 16 ROPs, I guess we'll know.
post #680 of 1284
Quote:
Originally Posted by kahboom View Post

Average about 1-5fps gain in my crossfire set up. But yes its more of ram stage's.

Quote:
Originally Posted by kahboom View Post

Using slits bios I lost 3-8fps in games. Since rops were cut down

Kahboom, these two posts seem to contradict -- what was the difference between them?
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