9600gt overclocking

[crtecha]

I heard that if you lower your pci freq to 90 you can overclock a 9600gt with the right cooling of course well past 800mhz. Does anyone have a 9600gt with a high overclock that's stable? Ill update with a screen shot once you get home to see my progress soo far.

 

[ntdouglas]

I have 2 of them in sli. I can game and bench at750/1875/1050 just fine. Never heard about lowering pci frequency though.

 

[iDont]

I heard that if you lower your pci freq to 90 you can overclock a 9600gt with the right cooling of course well past 800mhz. Does anyone have a 9600gt with a high overclock that's stable? Ill update with a screen shot once you get home to see my progress soo far.

What you say could be well possible, though it won't yield in any performance increases. The 9600gt doesn't got a physical crystal on its PCB, but rather uses the PCI-e bus frequency divided by 4 as it's crystal (100/4=25MHz crystal). Thus, if you lower the PCI-e bus frequency, you are effectively downclocking your GPU, which then allows you to raise the clock speeds again. The real clock speed won't be changed with a lower PCI-e bus frequency + higher clock speeds (therefore you got no performance increase)

Google for "9600gt crystal" (without the quotes), there should be plenty of information about this on the internet.

And if you are interested, I got my 9600gt up to 750/1950/2100 stable (core/shader/mem) on stock volts and to 825/2025/2100 stable with a GPU voltmod to 1.35V

-iDont

 

[Castiel]

Accidentally one time I shot it up to 800 and my screen went blank and my computer restarted. I think if you put a water cooling loop on it and you know what your doing with voltages and possible PCI Frequency then you will be able to hit it, but I don' think it is a good idea. Might ruin your card if you try.

 

[ntdouglas]

What you say could be well possible, though it won't yield in any performance increases. The 9600gt doesn't got a physical crystal on its PCB, but rather uses the PCI-e bus frequency divided by 4 as it's crystal (100/4=25MHz crystal). Thus, if you lower the PCI-e bus frequency, you are effectively downclocking your GPU, which then allows you to raise the clock speeds again. The real clock speed won't be changed with a lower PCI-e bus frequency + higher clock speeds (therefore you got no performance increase)

Google for "9600gt crystal" (without the quotes), there should be plenty of information about this on the internet.

And if you are interested, I got my 9600gt up to 750/1950/2100 stable (core/shader/mem) on stock volts and to 825/2025/2100 stable with a GPU voltmod to 1.35V

-iDont

I was kind of thinking the same thing. Yeah, your running your card faster but on a slower pci frequency, could cancel out speed of card.

 

[iDont]

I was kind of thinking the same thing. Yeah, your running your card faster but on a slower pci frequency, could cancel out speed of card.

No, you're mixing up two things. With normal videocards (or all pci-e cards for that matter), raising or lowering the PCI-e bus frequency only affects the bandwidth it provides. On the 9600GT however, the GPU will be effectively over/underclocked by adjusting the PCI-e bus frequency on top of the alteration of the available bandwidth.

 

[ntdouglas]

I see. What about raising the pci frequecy? That would effectively raise the overclock on the card right?

 

[iDont]

I see. What about raising the pci frequecy? That would effectively raise the overclock on the card right?

Yes, but if you are already at your max OC, then raising the PCI-e bus frequency will result in artifacts/other stability problems, just like if you added a few more MHz to the GPU. There is no advantage of OC'ing the 9600GT by adjusting the PCI-e bus frequency; you don't raise the maximum OC of the card, but rather simply overclock it in another way.

 

[Cja123]

I thought this was a pretty good overclock for stock air.

 

[ntdouglas]

Yeah, thats a nice overclock. I see your card stock is 700. Mines at 650 stock. I think sli is holding me back a little.

 

[Creatre]

This is the highest I've been able to get with my EVGA 9600, I was kinda bummed I couldn't get more. Probably going to upgrade soon though, had this card almost a year.

 

[ntdouglas]

See if they will rma it. The most I could get was 720. Then I smoked one of them. Got another one and could easily hit 750 no problem. That smoked video card was holding me back. To me, it was defective to begin with.

 

[crtecha]

 

[ntdouglas]

Is that your max overclock? Have you tried powering the pci bus?

 

[crtecha]

thats what I got too today. It started artifacting after about 10 minutes in furmark burn in test.

 

[RadeonX2]

This was on XP 32-bit
I don't have a bench yet on Vista 64

 

[damo10000]

My 9600gt overclock 900mhz stable

Hi i have a Gigabye 9600gt and dam its a good overclocker especially when u give it more voltage using gamer hud.

Initially it didnt work no temp changes or overclocking gains but it was the driver they shipped it with since updating it works fine and i get the best results at 1.35 volts any more and my 12volts rail droppes below 11.7 which i dont like lol.

Anyway its noisy as hell but with a Zalman VF-1000 and 120mm fan blowing on the side of it cooling the whole pcb board i can benchmark and game at 900mhz 2000shader and 1100memory so far ive got the shader at 2100 stable and a little more and 1160mhz memory but at that gpu clock it doesnt like much over 2000 and 1140mhz ram so i find this gives the best gain.

Considering the clocks im already at on air i dont think id get much more with water but just less noise so thats a incentive.

ill try to post some pics of how its setup and the AS5 paste dropped temps about 2-3degrees as well as the 120mm fan about 10 even on top of the 15 or so over the vf-700 it had on it when i got it.


Heres a screenshot ive attached running ATI only for 5 minutes but i consider is moderately stable lol most oc fail within seconds or a min or 2 and in gaming it doesnt stress it as much as this program. ive ran a few games at 915mhz but thats a bit overkill for 24/7 i will use 840mhz 2000shader and 1150mhz ram(2300mhz effective) and i can run fans on medium which are reasonably smooth and quiet .



Thanks alot Gigabyte uve made me achieve what is not possible without volt modding and it is a safe way of hard core overclocking lol

 

[ntdouglas]

Damn, thats an excellent overclock for a 9600.

 

[Creatre]

See if they will rma it. The most I could get was 720. Then I smoked one of them. Got another one and could easily hit 750 no problem. That smoked video card was holding me back. To me, it was defective to begin with.

NOOOOO!! My card is artifacting too on movies for no reason w/ overclock or stock clock which I need to RMA it for too, but I've had the card a year now already.

 

[ntdouglas]

NOOOOO!! My card is artifacting too on movies for no reason w/ overclock or stock clock which I need to RMA it for too, but I've had the card a year now already.

EVGA has lifetime warranty. Did you registar it when you bought it?

 

[ntdouglas]

Ok, here's my shit. I can game all day at these settings. Finally hit 1000 posts.

 

[iDont]

Heres a screenshot ive attached running ATI only for 5 minutes but i consider is moderately stable lol most oc fail within seconds or a min or 2 and in gaming it doesnt stress it as much as this program. ive ran a few games at 915mhz but thats a bit overkill for 24/7 i will use 840mhz 2000shader and 1150mhz ram(2300mhz effective) and i can run fans on medium which are reasonably smooth and quiet .

Nice OC, but consider running ATiTool for 10min+. If I clocked mine higher than ~870/2050/2100 (core/shader/mem) it would always artifact after stressing it with atitool for about 13 minutes. First 12 minutes were artifact/error free though.

Off topic: Just sold my current system (the one in the system specs) and am now waiting for my new phenom II system to arrive . My current (backup) Pentium 3 is giving me a hard time.

 

[crtecha]

I think I need a aftermarket cooler to achieve the clocks i want.

 

[wolf]

ive got 760/1900/1900 100% stable with those speeds flashed onto the card.

its an Asus 9600GT 1Gb, made on a custom PCB with the asus glaciator cooler.

one of my best nvidia cards ever, a cheap great performer, 1gb mem, exceptional build quality, low temps with the custom cooler... the list goes on.

1 very cold night i decided to whack on a universal GPU water block, and sit my box outside, ATi tool artifact scanner was running at under 20 degrees C (full load) so i decided to push up the clocks a tad..

820/2050 across the core was the best i got that night, but had to revert clocks later as i couldn't maintain the temps, i just put the glaciator cooler back on and reverted to my flashed speeds.

great card, might even pick up a second someday since i still have an SLi board and these cards scale beautifully.

i do play with my pci-e speeds but never noticed this crystal anomaly at all..... perhaps my custom pcb has an on board frequency crystal?

 

[erasure]

no, my PCI Express is MANUAL to 100MHz
and ASUS 9600GT's GPU 800MHz with no artifats (without volt mod)
but over 820MHz then BLACK screen, need more volt