gtx670m on asus g75vw Mhz issue

[jasko_jacker]

I have a problem with a motherboard for a asus g75vw, after installing a video card gtx670m it seemed to work but after checking the performance stops 300 Mhz.
The same video card with another motherboard identical to the first, and with the same hard disk, it works perfectly at maximum speed.
What could be the component that creates this problem?
thanks

[dellxps15]

Re: gtx670m on asus g75vw Mhz issue

does it have 3 heatpipe ? is it a 100 watt dissipation system? gpu-z log with vcore, temperature and so on ?

[jasko_jacker]

Re: gtx670m on asus g75vw Mhz issue

The gpu temp is ok (40 C to 50 C too low ?) , video card work well in another mobo with the same heatsink and bios chip, power adaptor is original with correct watt, the cpu is the same. Only difference is about mobo version:
Mobo ok is asus g75vw rev 2.1 mobo with Mhz stuck is g75vw rev 2.4.
It's possible a power problem, low amperage on mxm socket ?