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GTX680 Lightning PCIe/BCLK

post #1 of 18
Thread Starter 
Hello everybody

I was making a simple overclock with my new P8Z77-V and had notice that when i activate the auto tunning, my processors BCLK rises to 103MHz. Now my question: I have a GTX680 Lightning on slot, and i cant find any references for the maximum BCLK supported by this Vcard! Can somebody help me?

Regards
post #2 of 18
Yes I can

You simply can't overclock the BCLK because that links in with everything else, if you push it further than 103 your system won't boot.

Comps
post #3 of 18
Thread Starter 
Ok thanks for your promt reply!

But this card supports more than 103MHz? Right? I see one review that they test this lightning model with 125MHZ! Can I damage my card applying this kind of BCLK speeds?

Regards
post #4 of 18
I'd go into the bios and set the overclock to XMP (that'll put the BCLK to 100) , and change the multi to what ever is needed to get the GHz you have smile.gif

My auto sets mine to 43x103 giving me 4.429GHz!
So I set my multi to 45x the XMP 100, giving me 4.5GHz
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post #5 of 18
Right, I think you're mistaken

You can't overclock the BCLK on the Z77 motherboards or any sandybridge motherboard past 103, it links in to a lot of other parts of your machine and it will BSOD on boot up or not boot at all.

If you want to overclock the GPU you need to use MSI Afterburner or EVGA Precision.
post #6 of 18
Thread Starter 
Thanks Achilee5 thats my case! Ok Compuman145, but this mobo can do this BCLK from 80 to 300MHz, as i see in manual!
So what is the best i can go without damage my Vcard?
post #7 of 18
Right, but you should only overclock your CPU by using the multiplier, if you want to overclock the GPU you need to use EVGA precision.

Comps
post #8 of 18
Thread Starter 
Ok compuman145. A agree with you! But i want to know the limits for this Vcard once this doesnt have a manual! MSI dont provide the costumer with a detailed manual to use with. Thats insane! So i want to know the absolute maximum ratings to use with this one. Anyone by the way have this manual??

Best regards everybody!
post #9 of 18
It is not down to the card. Changing the BLCK make no diff to your GPU. As other have said OC using the multi.
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post #10 of 18
I've given up trying to explain that to him, the simplest explanation doesn't seem to work
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