8800GT bios for better overclocking! *test*

[nuttah]

What I did was take the eVGA 8800GT SSC BIOS, changed the voltage to 1.1v, and flashed it to my Palit. Since the card is more than stable at 700/1750/1000, the SSC BIOS is fine. But without changing the RAM timings 1000 is it for the RAM. I then took the same BIOS, changed the timings to the ones from the first post and now the RAM will go to 1044 no issues. Not much, but it helps.

Yes but did u get any fps increase?

[counsol]

So, what do you think the chances are that the new 8800GTS (G92) is using A2 of the GPU, and we can flash that bios onto the GT to make it a GTS

[theonlybabyface]

Modded my BFG OC bios to some conservative speeds and relaxed my timings to those on the first post with the 1.1 v mod. I'll test it later to see if my overclock has improved or not. Funny thing is...if I overclocked with rivatuner previous to the flash to the same speeds with the factory tighter timings, I scored less in 3DMark06. With the relaxed timings, the bios set overclock and the extra volts, my 3DMark06 actually increased by nearly 500 points. Go figure.

PS - Original clocks were 625/1566/900

[JacobF]

Here is a new BIOS that increases fanspeeds for the EVGA 8800GT SC

http://www.evga.com/forums/tm.asp?m=176929

[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..

[BTK]

I have EVGA vanilla stock GT clocks of 600/900/1500

Did the 1.1V Bios Mod

Running stable 24/7



My memory doesen't clock so well but who cares.

13,333 3DMark06 w/ this also 24/7 stable

http://valid.x86-secret.com/show_oc.php?id=275691

[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?

[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?

[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.

[antari]

Unfortunately that is not 100% stable with the stock cooler, it is OK in ATItool until the temperature reaches about 58 to 60 degrees then it occasionally artifacts. I have not tried Crysis as I only have that in Vista, my XP hard disk that I do overclocking with ONLY has XP and the necessary overclocking/benchmarking tools.

So far 720/1728/2050 (approx) is completely game stable but for day-to-day gaming I run at bone stock 600/1500/1800 as that is fast enough for what I play generally. I am sure I could go a bit further than that stable but I'd much rather get the benchmarking results then go back and play games than find the max 100% stable speed that I will never use.

[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

[Diverge]

Mine in that address had hex 0x00

weird, mine has a 0x82... which is 130 in decimal.. or 1.3V.. which obviously didn't really set it to that, since the max you can set is 1.1V.

[antari]

Just bit the bullet and tried the mod.

Steps:
1. Dump BIOS from card to NiBiTor
2. Change "Exact" "Extra" voltage in NiBiTor to 1.1V (was blank)
3. Save BIOS to bootable disk.
4. Reboot to DOS bootable disk, flash using command "nvflash -4 BIOSNAME.rom"
5. Reboot. That's it.

It seems to have worked, happily ATItool testing core @ 756/1836 (which has locked up once or twice for me before in 3D06.

edit: spoke too soon maybe? Perhaps it's the cooler temperatures. 771MHz core artifacted in ATItool right away, no crash or anything though.

edit2: 771MHz core is going fine with shaderclock bumped down to 1782... temp 55°C with stock cooler, fan @ 100%
edit3: 771MHz went fine in ATItool for 30minutes so I've stopped it, bumped core to 777mhz and retried. So far good for 10 minutes.

[giorgos th.]

no need to upper the core and lower the shaders...
you`ll have the same performance like with link clocks.
i`m for now using mine at 771/1890/1900 with water with no problems at all.

[antari]

Hmm I think cooling may be some of my problem... what maximum load temperature do you get with water?

[Khapz]

Just bit the bullet and tried the mod.

Steps:
1. Dump BIOS from card to NiBiTor
2. Change "Exact" "Extra" voltage in NiBiTor to 1.1V (was blank)
3. Save BIOS to bootable disk.
4. Reboot to DOS bootable disk, flash using command "nvflash -4 BIOSNAME.rom"
5. Reboot. That's it.

It seems to have worked, happily ATItool testing core @ 756/1836 (which has locked up once or twice for me before in 3D06.

edit: spoke too soon maybe? Perhaps it's the cooler temperatures. 771MHz core artifacted in ATItool right away, no crash or anything though.

edit2: 771MHz core is going fine with shaderclock bumped down to 1782... temp 55°C with stock cooler, fan @ 100%
edit3: 771MHz went fine in ATItool for 30minutes so I've stopped it, bumped core to 777mhz and retried. So far good for 10 minutes.

and, this modification resolve the 30% fan speed problem?

[Jip]

hello all,
me i've flash my XFX GT with the bios post in first. I change the manufacturer and the subsystem ID.
For précision i'm at (max) : 740/2106/1836 (orig 640/1900/1600)... and i've made 14025 on 3DMark06 with my E6850...
With the bios mod at 1.1 i can't pass this limit !

when i more easy with nibitor i've tryied to put the voltage at 1,15v but impossible, i've tryied tis to :

Voltage 1 : VID0 1v
Voltage 2 : VID1 1,05v
Voltage 3 : VID2 1,1v (= put VID3 for have 1,15v)
Voltage 4 : VID3 1,15v

The same system of bios orig but i replace the VID3 1,1v by 1,15v
All the VID are the same of original 0/1/2/3 but the modif of VID2/3 by hex

2nd test
Voltage 1 : VID0 0,95v
Voltage 2 : VID1 1v
Voltage 3 : VID4 1,15v
Voltage 4 : VID4 1,15v

I put a new VID the 4 and i put 1,15v...

The flash it's ok, but the oc it's the same or bugg of card

I sur that possible to put the voltage more of 1.1v

[giorgos th.]

Hmm I think cooling may be some of my problem... what maximum load temperature do you get with water?

with the heater on in the room,i max load at 42C.
Without it at 34-35C.
i also have the quad and the X38 in the loop.

[antari]

and, this modification resolve the 30% fan speed problem?

Nope it does not. For benching I use 100% fan speed, and I have set up fan speed profiles in RivaTuner for standard use/gaming.

with the heater on in the room,i max load at 42C.
Without it at 34-35C.
i also have the quad and the X38 in the loop.

Thanks very much Looks like water will be the way to go for me.

[r4st4m4n]

hello all,
me i've flash my XFX GT with the bios post in first. I change the manufacturer and the subsystem ID.
For précision i'm at (max) : 740/2106/1836 (orig 640/1900/1600)... and i've made 14025 on 3DMark06 with my E6850...
With the bios mod at 1.1 i can't pass this limit !

when i more easy with nibitor i've tryied to put the voltage at 1,15v but impossible, i've tryied tis to :

Voltage 1 : VID0 1v
Voltage 2 : VID1 1,05v
Voltage 3 : VID2 1,1v (= put VID3 for have 1,15v)
Voltage 4 : VID3 1,15v

The same system of bios orig but i replace the VID3 1,1v by 1,15v
All the VID are the same of original 0/1/2/3 but the modif of VID2/3 by hex

2nd test
Voltage 1 : VID0 0,95v
Voltage 2 : VID1 1v
Voltage 3 : VID4 1,15v
Voltage 4 : VID4 1,15v

I put a new VID the 4 and i put 1,15v...

The flash it's ok, but the oc it's the same or bugg of card

I sur that possible to put the voltage more of 1.1v

If you read the earlier post in the thread it is already explained why the modification you have done does not work and also that it seems impossible to go higher than 1.1V with a bios mod