Unable to OC SLI cards

[Rukee]

I have a pair of BFG 6800 GT OC cards in SLI and it seems coolbits fails at whatever speed I put it at, even underclocking. The cards run good and score great at stock speeds, just can`t understand why they don`t OC at all, not even 2MHz.
a3500 @ 2.8GHz
A8N-SLI
True Power 430 volt mod`d on all rails
OCZ PC4200 (beta sticks)
71.84 drivers

any ideas??
Thanks for any imput.

[Micutzu]

You can't OC with 71.84's and SLI ... try other drivers.

[Jimi...]

Yeah, I think it's the 75.90s and higher you can only OC with.

You can download the drivers from here... (http://downloads.guru3d.com/)

[fagin]

As said 71.84 will not O/C in SLI. Though if you are confident the GTs will run where you want them you could always mod the bios.... :)

[Rukee]

Thanks for the dead on info!! Changed drivers and now it`s back to normal.


Speaking of MOD`d bios`s (/hyjacking his own thread) I have a Gainward GS FX5950u runs faster by a ton if I underclock it, can I flash it with a bios from a diffrent card, or have someone mod this one for me?

[mdzcpa]

There is an easy way to overclock with the 71.84s. Use Riva Tuner and go to the Power Users section. Under the reg settings. under \Nvidia\overclocking set the Disable Internal Clock Test to a value of 1.

Bingo!

Also, any of the 71 series drivers will OC in SLI except for the 71.84s as well as the 75s noted above.

[matt9669]

There is an easy way to overclock with the 71.84s. Use Riva Tuner and go to the Power Users section. Under the reg settings. under \Nvidia\overclocking set the Disable Internal Clock Test to a value of 1.I have the same BFG cards and the above has always worked great for me, regardless of driver revision :up:

[kswiss]

Hello,

I don't mean to hijack this thread, but I basically did the above with the official nvidia drivers and rivatuner, now whenever I go to bench in 3dmark03 or 05, its reading my core clock at 299, it is like its stuck on 2D settings. I can adjust the 3d, but 3dmark still benches at the 299. I am really at a loss here. I tried reformatting and everything.

Any suggestions would be great.

Thanks. :(

[mdzcpa]

You'll need to set both the 2D and 3D clocks to the same setting.

[D_o_S]

Hello,

I don't mean to hijack this thread, but I basically did the above with the official nvidia drivers and rivatuner, now whenever I go to bench in 3dmark03 or 05, its reading my core clock at 299, it is like its stuck on 2D settings. I can adjust the 3d, but 3dmark still benches at the 299. I am really at a loss here. I tried reformatting and everything.

Any suggestions would be great.

Thanks. :(

I was having exactly the same problem! As MDZCPA says, change the setting for both and there you go!

But also, how come you have to change both? Don't the cards switch between 2D and 3D mode?

[mdzcpa]

But also, how come you have to change both? Don't the cards switch between 2D and 3D mode?

Unfortunately that's the "real" issue with the 71.84 driver. Your going to be stuck at the same clock for both 2d and 3d.

[kswiss]

You'll need to set both the 2D and 3D clocks to the same setting.

Interesting, I will try that, thank you for the info! :D