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8800GTS (G92) OCing (840/2248/2098), experimentation/thoughts - Page 4

post #31 of 48
Hi guys , first of all congrats for the nice results

have a look here

http://www.hwupgrade.it/forum/showthread.php?t=1701718

It's in italian but if you want I could translate anything you'll need .

My best result and all the others :

------------------------Q6600@3.740GHzx8 + 8800GTS@801-2012-1166
------------------------+driver forceware 169.44

3DMark Score 16817 3DMarks
SM 2.0 Score 7091
SM 3.0 Score 6744
CPU Score 5817

1 - Return to Proxycon 58.66 FPS
2 - Firefly Forest 59.52 FPS
CPU1 - Red Valley 1.94 FPS
CPU2 - Red Valley 2.79 FPS
1 - Canyon Flight (SM 3.0) 66.55 FPS
2 - Deep Freeze (SM 3.0) 68.33 FPS


------------------------Q6600@3.440GHzx8 + 8800GTS@810-1970-1192
------------------------+driver forceware 174.44

3DMark Score 16442 3DMarks
SM 2.0 Score 6886
SM 3.0 Score 6755
CPU Score 5468

1 - Return to Proxycon 57.19 FPS
2 - Firefly Forest 57.58 FPS
CPU1 - Red Valley 1.8 FPS
CPU2 - Red Valley 2.65 FPS
1 - Canyon Flight (SM 3.0) 66.98 FPS
2 - Deep Freeze (SM 3.0) 68.12 FPS


------------------------Q6600@3.6GHzx8 + 8500GT
------------------------+driver forceware 169.44

3DMark Score 2465 3DMarks
SM 2.0 Score 888
SM 3.0 Score 832
CPU Score 5730

1 - Return to Proxycon 7.04 FPS
2 - Firefly Forest 7.77 FPS
CPU1 - Red Valley 1.91 FPS
CPU2 - Red Valley 2.75 FPS
1 - Canyon Flight (SM 3.0) 7.1 FPS
2 - Deep Freeze (SM 3.0) 9.54 FPS


------------------------Q6600@3.6GHzx8 + 8800GTS@DEFAULT-----

3DMark Score 14498 3DMarks
SM 2.0 Score 5954
SM 3.0 Score 5703
CPU Score 5639

1 - Return to Proxycon 49.29 FPS
2 - Firefly Forest 49.94 FPS
CPU1 - Red Valley 1.88 FPS
CPU2 - Red Valley 2.71 FPS
1 - Canyon Flight (SM 3.0) 55.03 FPS
2 - Deep Freeze (SM 3.0) 59.03 FPS


=============+Q6600@3.5GHz A3 moltiplicatore 8==============================

3DMark Score 15298 3DMarks + 8800gt @ 721-1860-1062
SM 2.0 Score 6404
SM 3.0 Score 6059
CPU Score 5552

1 - Return to Proxycon 52.4 FPS
2 - Firefly Forest 54.35 FPS
CPU1 - Red Valley 1.84 FPS
CPU2 - Red Valley 2.68 FPS
1 - Canyon Flight (SM 3.0) 58.68 FPS
2 - Deep Freeze (SM 3.0) 62.5 FPS


My little beast cooled by a CoolinkGFXChilla






Quote:
I was never a big fan of the futuremark bench applications, but that had more to do with my inferior GFX cards from eons gone by... Undoubtedly others already know this, but increased memory clock significantly boosts HDR/SM3.0 scores. Prior to this mornings bench session I had kept my memory clocks between 1000-1013mhz. Well, after I found that my core/shader clocks limits were near identical to their linked speed (840mhz core / 2100mhz shader) I decided to tweak my memory -> 1103mhz and I may yet have a little more headroom.
you're right , I've tested myself this thing 1 month ago and I second that ; the main thing it's the bandwidht which it shouldn't be saturated due an high core clock . That's why overclocking 8800GT don't allow a valuable result, over 800 of core ; at the same time you will need more bandwidht and only a >1.0ns pair of ram will allow better results .

We'll see what will happen with these new GTX cards, especially at 850-900 of core and 1200+ of ram in opposition to GTS 512 at the same core-shaders frequency but 1100 of ram .

Btw , the more you go further with the core, the more you'll need to lower the ram ; I don't know why but it seems that it's like this . I should test more but I've benched at 1192 of ram with my GTS 512 (asus, the normal one) .


Quote:
While many believe memory clock isn't as important it's still worthwhile to tweak especially once you have determined the upper limits of the core/shader. I had been planning to upgrade my monitor and CPU next, now I think I'll upgrade my CPU and go WC instead. Perhaps H20 + v-mod will make 900mhz+ core / 2250mhz + mem / 2250mhz + shader achievable? 9800GTX... What's that?
post #32 of 48
Nice going OP.
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NEMESIS
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post #33 of 48
just edited with photos and screens
post #34 of 48
Thread Starter 
Quote:
Originally Posted by Vinco View Post
wow, so i bump my clock speed to 800 mhz, my memory to 1k, and my shader to 1964, and my 3dmark score goes down???? how does that happen?
The same thing happened to me when I went for 845mhz core / 2110mhz shader... Lower score after an OC means the OC wasn't stable.

I've looked into WC, but holy crap that's expensive ><... I'll probably just buy either a GT200/RV770 when it comes out and upgrade my grandmas rig with my current 8800GTS .

Quote:
Originally Posted by -Nox- View Post
you're right , I've tested myself this thing 1 month ago and I second that ; the main thing it's the bandwidht which it shouldn't be saturated due an high core clock . That's why overclocking 8800GT don't allow a valuable result, over 800 of core ; at the same time you will need more bandwidht and only a >1.0ns pair of ram will allow better results.

We'll see what will happen with these new GTX cards, especially at 850-900 of core and 1200+ of ram in opposition to GTS 512 at the same core-shaders frequency but 1100 of ram .

Btw , the more you go further with the core, the more you'll need to lower the ram ; I don't know why but it seems that it's like this . I should test more but I've benched at 1192 of ram with my GTS 512 (asus, the normal one) .
Thanks for sharing your results! I doubt the GTXs will OC upwards of 900mhz core without a v-mod, but I guess I'll have to do some digging to find out for sure...

-EDIT-

added pic for another thread ><

Attachment 71672
Calculon Ω
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post #35 of 48
Quote:
Originally Posted by MasterKromm View Post
Thanks for sharing your results! I doubt the GTXs will OC upwards of 900mhz core without a v-mod, but I guess I'll have to do some digging to find out for sure...

Obviously WITH a Vmod .. 900MHz on the core it's a lot , too much to handle with a 4 phase power source and 1.15-1.2V on the Vcore .. They could improve it with the new 55nm version but I doubt that with 170+ SP we could reach such frequency , in total stability (Rock Solid, RS) .

Have a look here too : http://www.overclock.net/nvidia/3202...i-bench-4.html 9800GTX VS 8800GTS 512 both at the same frequency
post #36 of 48
I'd kind of like to know how the heck you guys are getting such monster clocks! In my sig, i can reach 752 core, 1916 shader, 1052 memory stable. Anything past that is a suicide run for me. That's WITH my fan at 100%...and I load almost on the dot at 55*C on my GPU. Hmmm, got me stumped, lol. Great job though...wish mine could clock that high.
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post #37 of 48
EVGA 8800GTS ? I have a simple ASUS .. With default cooler at 100% It've been possible to bench at 800-2000-1166+(not more because of it's useless at such core clock) but it was like a raging tornado . Now I've changed cooler as you can see but only 810-1944-1192 it's benchable .
post #38 of 48
Hmmm

I have my EVGA 8800GTS 512MB at 775/1000/1936 w/ fan at 75% and my Q9300 at 415x7.5=3.113 GHZ and my 3DMark06 score is 14,549 see sig for link.

I guess I should be happy, but I want more
    
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post #39 of 48
785/1952/2104 w/ stock fan @ 100%

Score for 3dmark06 ~ Q6700 @ 3.85 ghz, GPU @ 815/1993/2222/ 100% on fans

http://s34.photobucket.com/albums/d1...=17kmark06.jpg
3dmark06 score

GPU stable at 785/1952/2104 [stilll running atitools artifact scan (28 minutes into it now)

http://s34.photobucket.com/albums/d1...legpuspeed.jpg
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post #40 of 48
Thread Starter 
Before and after : It's all about the cores and mhz ->

Before: 3.42ghz E4300 8800GTS G92 840/2206/2098 14,228



After: 3.6ghz Q6700 8800GTS G92 840/2198/2098 16,973



After #2: 3.9ghz Q6700 8800GTS G92 840/2198/2098 17,399

Attachment 73137

SM2 6644 -> 7351 +707(10.6%)
SM3 6803 -> 6917 +114(1.68%)
CPU 3044 -> 6115 +3071(101%)

It's seems this Q6700 might even squeeze out a few more Mhz...

Edited by MasterKromm - 5/15/08 at 3:50pm
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