8800GT bios for better overclocking! *test*

[giorgos th.]

Jonnyguru said on another forum that something bad will happen if you go over 950 for 24/7 use. But he didn't give much explanation on that, just that it was the reason why many facturers don't OC the mem higher than that.

Well, now that we have more OC results, we can see that on many boards, the RAM doesn't clock well. Many users here doesn't seem to be able to reach 1000, the average being more in the 950. And the one reaching 1000 can go much higher.

So now I wonder if the manufacturers doesn't clock the mem higher simply because the mem chips are

Beacause the mem of this card is not sth special,running over 2Ghz effective,might give you permanent artifacts within time...
no need to push it to limits for 24/7 usage..

[r4st4m4n]

Beacause the mem of this card is not sth special,running over 2Ghz effective,might give you permanent artifacts within time...
no need to push it to limits for 24/7 usage..

To be on the safe side I use now 2 OC profiles:
- 24/7 OC is 700/1675/950 which allow me to play any game maxed out at 1280x1024 except crysis (i have only a 19'' monitor )
- A crysis OC profile at 712/1728/1000 that i activates thanks to a key stroke shortcut set in rivatuner

My memory seems quite good since I only start to get artifacts around 1020 MHz so by running at 1000 MHz I still have a small safety margin.

[hifiking]

I tried the BIOS voltmod, 1.2v. I measure the 2d volt to 1.108 and the 3D volt 1.145. Someone said that 1.1 was max trough bios. Is my multimeter inacurate?

[r4st4m4n]

I tried the BIOS voltmod, 1.2v. I measure the 2d volt to 1.108 and the 3D volt 1.145. Someone said that 1.1 was max trough bios. Is my multimeter inacurate?

No, the card overvolt slightly from the value in the bios and particularly it overvolts during load.

[antari]

So does only changing the "Extra" voltage in NiBiTor cause the change to 1.10V? My Palit reference card has VIDs 1.10, 1.05, 1.00 and 0.95 but the Extra voltage selection is blank. The card clocks to 756/2124/1836 for 3D06 so far on stock air with stock BIOS.

TIA.

[RPGWiZaRD]

The card clocks to 756/2124/1836 for 3D06 so far on stock air with stock BIOS.

Just be happy if it really is stable, that's well above average result and would put a smile on my face if I had reached on stock cooler and volts.

[Diverge]

So does only changing the "Extra" voltage in NiBiTor cause the change to 1.10V? My Palit reference card has VIDs 1.10, 1.05, 1.00 and 0.95 but the Extra voltage selection is blank. The card clocks to 756/2124/1836 for 3D06 so far on stock air with stock BIOS.

TIA.

lots of cards have that field blank, as does mine. It's cause it actually has a different value at that address, which doesn't correlate to the known value in nibitor... at least that is what i think. I posted what i found in this thread a few pages ago.

Yours most likely is set to a higher value, even though it doesn't really set it to that value. whether it defaults down to the highest working value (1.1V) hasn't been verified.

click hex view in nibitor, then click the Extra voltage that is blank. it will jump to that address/value in the hex view and show you the value in hex. Now toggle through the values you can select and watch that hex value change... i bet yours was set to a higher hex.

[antari]

Mine in that address had hex 0x00

[jonnyt1000]

I've got a Zotac card which comes stock with 1.1v on the core and 2.0v on the ram, as measured with a multimeter.

Just flashed it with a modded bios (Set to 1.2v and with RAM timings loosened to Qimonda spec) and i'm now seeing 1.15v on the core. Clocks are now 100% stable @

771/1836/2000

Card is watercooled and doesn't top 45c load.

[scamps]

@johnnyt1000
Could you please upload your bios?