260m SLI voltage question

Hey, quick question , have an m17x-R1 with 260m SLI (OC"d 650/1100/1600 stable) and im looking to push it further. Is there any software/tweak that will allow me to adjust the voltage on this rig ?

 

Yeah, the voltage of the 260m can be slightly adjusted in the VBIOS (from 1.0V to 1.03V if I remember correctly), should allow for about 700MHz core clock.

 

Does this mean you can OC a 260M so it is faster than a 4870M?

 

Benchmarks will tell, not all cards can stand the same overclock.
Yours took 650Mhz core clock while others might not be able to reach that while others can do way more with some more voltage so you'll have to play a little and reach the sweet spot.

 

I have the 4870M, clocked to 650/1075. I am limited by the voltage. If I could could get 2.0 volts into the card, I don't see 750 maybe even 800 on the core out of the question. Temps now (Well, used to be) never go above 70 in any game I play.

With that in mind, I wonder if picking up a cheap set of 260's and OCing them to death might not yield better performance than 4870M's? I would love to see SLI 260M performance overclocked.

 

With 2.0V your card would be dead.

Besides, the voltage regulator probably can only get up to 1.5V (which most probably would kill the card as well, if not instantly then after a little while)

Anyway, just upping the core won't necessarily result in a better performance, you might get limited by the RAM sooner or later.

I've seen the 4870m scoring P8000 (GPU score) in vantage, that's quite a bit more than the 260m is capable to do, I got my 260m hardly to P6300

 

It is dead

Your words hurt.

 

Did I miss something? I don't get it...

 

My 4870 is dead.

...

 

Well, yeah... if you only flashed the VBIOS with a voltage which was too high the card probably isn't dead, it simply won't POST. To kill a card with voltage you have to modify the voltage regulator.
If your card only suffered from flashing an experimental vbios, then it's probably still alive and simply needs to be reflashed.

What exactly have you done?

 

Flashed to 1.2 volts..... among other dumb things.


It was a joke. A bad one. But a joke.

 

So is your card booting or not?

 

Thanks alot for the reply, outside standard OC and monitoring tools im not familiar with the modding of VBIOS, could anyone direct me to some info on how i would go about using VBIOS to mod voltage on the m17x-r1 260m"s?

 

It's really intuitive. You use:

1) Use Nvflash or GPU-z to extract the current vbios, of your card(s ).

2) Use NiBiTor to edit the vbios, you can edit a lot stuff there, but voltage in this case.

3) Flash the modded vbios, using Nvflash.

Nvflash is a software, which uses command lines, MSdos. But the software comes with a list of commands, how to use them, and what they do.

Nibitor, is really intuitive, it has graphic interfaz, so no need of command line.

 

Thanks alot folks, Dell needs to start paying you people for doing they"re work for them . Not talking about this question in particular, but ive gotten some serious help browsing this forum before (thank god for PCIE Gen2 = OFF ). Keep up the good work!

 

Usually a card should boot with this setting, with all the cards I've tried this so far the voltage simply got set back to the default or a lower value.
The other things (whatever they are) might have messed it up.
Still, if it was only dead after the flash it should be possible to reprogram it.

 

A little off-topic,

svl7, one question, how is the GTX 470M, compared to the 6970m ???? are they on pair?

 

Thought id give you alittle update. Flashed the 260M"s to 1.030 V. Allowed me to push the cards to (700/1200/1700) stable, Extreme burn-in with furmark peaked at 85 C after an hour, no artifacts! the m17x sounded like a jet taking off 10 mins in but temps are acceptable, dont really see myself straining the cards to that extent anyway Thanks alot for helping me squeeze the last bit of juice out of this awsome machine!

 

I'm glad to hear the good news.. you can always use Nvidia System Tools, to overclock only with certain games, using profiles.

 

Yup, thats what I"ve been doing, those clocks are for BF3 and benching only nothing else i play requires that kind of boost