MooNiSLe

Hi Prema, thanks for doing all these great job for us! I'm a W350ETQ user and using v3 OV 900P Edition now, I've noticed that the maximum voltage for GTX 660M in this version is 1.1125V and that's a relatively low voltage if you have a good cooler condition. So I tried to improve it by myself, I extracted the BIOS and got a file named C5D7EAAD-B218-482C-A909-E3B8CDB00E94_648.ROM (86.5KB) which contains complete VBIOS of GTX 660M and modified it by using WinHex. But when I tried to replace the modified file then repack all the ROM files together through using PhoenixTool I got a error message "module count mismatch". I also tried MMTool Aptio to replace 10de, fd4 device and it only changed the VBIOS in A062CF1F-8473-4AA3-8793-600BC4FFE9A8_693.ROM (a 411KB file) and after flashing there are no change about the voltage. Seems like there are two 660M VBIOS in the BIOS and only the one whose name is C5D7... have effect on the real voltage? Could you kindly tell me how to modify the voltage without getting the error message? thx!

Ah yeah you see that? That's very unstable frequency and I've tried many times to past the 3DMark 11, also it can not work perfectly with the i7-920XM @ 3.33GHz. And that's on the tweaked driver 310.70 WHQL which all the settings are for benchmark. Now I roll back to 306.02 for better image quality in game and downclock much from that crazy frequency cause I'm satisfied with a 680M-like 670MX If switch to another driver the Graphic Score should be higher than this.

Of course Overvolted to 1.1V, it seems to be the maximum voltage the Kepler card can achieve, I try to modify it higher but only the sensor changed the actual voltage stayed on 1.1V. Not recommend you to try this voltage because it may burn your card, I use special way to solve the heat problem

@svl7 Since you are busy to tweak the GTX 680M VBIOS I decide to modify my GTX 670MX VBIOS by myself Read the thread from the first floor to the last one and finally I succeed! Very thanks for your contribution to the 680M VBIOS! See what I've done All based on my ALIENWARE M15x! Stock Frequency: 600MHz/2800MHz and this one got 1006MHz/4010MHz!

I've got a GTX 670MX for my ALIENWARE M15x and it's amazing cooler than the GTX 260M, full load under 40℃ when I set the fan maximum! But I don't know how to use WinHex to modify the voltage and the max frequency of the card so I upload the VBIOS here if you could kindly help me modify it, thx The default voltage should be 0.9375V if I remembered correct and the max frequency can only be pulled 135MHz higher based on the default. Could you please modify it to 1.0V or 1.05V and unlock the max frequency to 1300MHz? If possible pls provide both 1.0V and 1.05V VBIOS because I really want to know what the GTX 670MX could achieve Here's the VBIOS: 670MX.ZIP