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What's the best stable gfx overclock you've managed?

keyser

keyser

keyser

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23 Aug 2005
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1,274
As topic says, just wondering. I've only managed ~8% on current card, before I get glitches etc. I'm sure when the card was new I could get more, which could mean drivers are more fussy and/or it's getting old..

It would be nice if you could get a 50%+ overclock as we've kind of come to expect from todays CPUs :) Why don't we with gpus?
 
Mainly because GPUs performance within a product range is normally differentiated by the number of pipes/shaders etc which are a physical feature of the card, rather than clock rate which are generally set as fast as it goes + tolerance to take into account bad case cooling, silicon variability etc.

You can get GPUs that will give you 50%+ overclocks but they are typically low performance parts that even when overclocked give mediocre performance.

It's effectively equivalent to Intel selling only single, dual and quad core CPUs all running at 4GHz.
 
Hiked the Shader on a 8600gt from 1188 to 1570 stable on 3D 06 and FEAR (and Sims :D) only got another 150mhz on the core though.
 
Well I've managed 660/1625/2050 on my GTX. I could mess around and get the memory a little higher, the core won't go further than that and the shaders are just a mess about, I can never get it stable above 1625.
 
Got about 10% on core but less on ram :( running at 674/1670 and stock is 610/800 as its an overclocked version.
A normal 7950GT is 550/1400 so i suppose compared to that its a nice overclock :)
Cant complain as its now faster that a 7900GTX......need a 8800 card now though.
 
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V1 50->60mhz (20%)
V3-2000 143->182 (27%)
GF2MX 175/183->202/220 (15/20%)
Ti4200 250/500->282/614 (13/23%)
9800SE-AIW - can't remember, was softmodded and at 9800pro speeds but ram a bit higher
6800 325/700->390/910 (20/30%), plus softmod to 6vp
6800GT 350/1000->401/1090 (15/9%)
7900GTO 650/1320->710/1684 (9/28%)
GTS320 550/1584/1300->630/1950/1551 (15/23/19%)

So as you can see, I normally get more luck with the memory (~25%) than the core (~15%). Best card clocking statistically was the Voodoo3, probably because I tacked an old socket7 fan onto it using a long cable tie :) The 6800 was probably just a good an overclock in reality though.
 
Perfect_Chaos said:
is it possible to physically mod a card to add more pipes etc?
Click to expand...

Not the current batch of cards as far as im aware. With some previous gen cards it was possible using very simple software hacks.
My GTX went from;
Core 575 -> 660
Shad 1350 -> 1670
Mem 1800 -> 2080
I pushed the core to ATI tool max, then the shader and finally the mem.

8600 GT went from;
Core 540 -> 690
Shad 700 -> 820
Mem 1400 -> 1640
Again this is ATI tool stable
 
HangTime said:
V1 50->60mhz (20%)
V3-2000 143->182 (27%)
GF2MX 175/183->202/220 (15/20%)
Ti4200 250/500->282/614 (13/23%)
9800SE-AIW - can't remember, was softmodded and at 9800pro speeds but ram a bit higher
6800 325/700->390/910 (20/30%), plus softmod to 6vp
6800GT 350/1000->401/1090 (15/9%)
7900GTO 650/1320->710/1684 (9/28%)
GTS320 550/1584/1300->630/1950/1551 (15/23/19%)

So as you can see, I normally get more luck with the memory (~25%) than the core (~15%). Best card clocking statistically was the Voodoo3, probably because I tacked an old socket7 fan onto it using a long cable tie :) The 6800 was probably just a good an overclock in reality though.
Click to expand...

Cant believe you can remember that :eek:
 
8500GT :D clocks from 450MHz to 720-730 and with voltmodding you can get almost 100% OC - I had 2 of them in SLI both running OC'd to 730MHz for awhile in my 2nd PC before swapping them for an 8800GT. Not exactly gaming cards tho... to give you an idea both of them in SLI running those huge OCs were struggling to get over 10fps average in crysis benchmark whereas the single 8800GT manages 50 average with ease - can't wait to put another 8800GT in there to SLI em.

The 8800GT doesn't OC so well tho - once I did a small volt mod I got almost 30% extra on the core - I don't generally consider an OC worth it unless you get atleast a 25% performance boost.
 
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My 8800GTS clocked very well, seen others do a bit higher though.
Default:
Core 675
Shaders 1674
Memory 1940

Running stable in games at:
Core 775
Shaders 1950
Memory 2100

:D

Crysis went from:
All high 1920x1200
33-45 fps
to
40-58
 
Thanks for response. Rroof and Senture: What heatsink do you use and temps did you get? I guess when you volt mod the limiting factor is heat?

I hoping to get a new nvidia card when they're out in ~1 month. Depending how good the stock cooler is (and it fits), get an Arctic Cooling Accelero S1 VGA Cooler + 120mm fan for silence. If a really good gfx cooler comes out that enables, say an extra 10%+ it'd be worth it.
 
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Stock cooler on my BFG 8800GTS, no volt modding. It might be worth noting that my motherboard fits in upside down lol
Temps never go over 65 with the fan on 66%
 
melbourne720 said:
6800GS, soft modded to a GT (extra shaders/vertexes) then about a 20% OC on top of that after adding a massive Zalman copper HSF :)
Click to expand...

here it is

rivatuner.jpg


6800.jpg
 
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alexthecheese said:
Cant believe you can remember that :eek:
Click to expand...

I have an uncanny memory for certain specific details (e.g. I can remember trivial incidents from playground football kickabouts 15 years year ago). To be honest I had more trouble recalling the clocks on the more recent cards, and I cheated with the 7900GTO (search!).
 
My X800GTO was the best overclocking card i've had, mem went from 1000MHz to 1200, core from stock 400 to 600MHz:D, most reliable card i ever had, never artifacted, unless the core was pushed way over 630MHz.
 
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