GTX 675MX core clock anomalies

[Flagman]

Hey, I have MSI GT70 with GTX 675MX and there is a problem with its core clock. My problem is kind of similar to one in this thread http://forum.techinferno.com/msi/3792-675mx-clock-stuck-stock-msi-afterburner-enabled.html is but there is more stuff that's unexplainable. I have stock 10U BIOS, vBIOS is also stock http://gpuz.techpowerup.com/14/06/25/bkw.png

As most of you know MSI GTX 675MX standart core clock is 666 Mhz. The problem is that pc boots with 675MX clock as 653 for no apparent reason or explanation. I now have 2 OSes in my pc, and while with my old OS in old HDD the chance to boot with 666 was about 20%, with my new OS in new SSD that chance is absoliutely gone, and it never boots into 666. If it boots with core clock as 653, there is no way to overclock it. MSI afterburner doesn't work, Nvidia Inspector doesn't work, targeting different pstates doesn't work above 653, while down-clocking works as it should. I can turn my pc with new OS, see 675MX clock as 653, restart with old OS, core clock magically is 666, overclocking works to vBIOS limited +135 without problems, then I restart pc to new OS and its back to 653 which doesn't let me OC VGA in any way I tried. I had most drivers from OEM 306 to 340 but none of them had any effect on this behavior.

I wonder what are the chances that modified vBIOS would fix this problem, and/or is there anything else that might change these anomalies.

[svl7]

Does the GT70 officially support this card? If not, chances are that the modified vbios you find on T|I will fix this.

Also, can I get a copy of your vbios?

[Flagman]

My GT70 came with this GTX 675MX, so yea its officially supported. I have seen few treads online from GT70 with GTX 675MX owners that have the same 653 problem, but there were either no solution or it did nothing in my case.

Here's my vBIOS 675MX.zip

[svl7]

Thanks. Yeah, well, I'd say try the mod and see whether it helps.

[cresterk]

Hey, I have an msi gt70 with the 675mx too. Now, this model doesn't seem to be much popular for some reason and its pretty hard to find guides, faq etc for it online so I got most of my info through experimentation. But the core clock being stuck at 653Mhz is because you have not activated your turbo button. Just click the button on top called "Turbo" and it will light up orange. This will force your core clock to stay at 666mhz and also increases your voltage to 1.012V. If you have OCed through afterburner, then this will make it run at whatever core you set. If, touching the turbo button does nothing, make sure MSI's "VGA overclock tool" is running.

If you flash svl7's vbios, along with the other changes, it will also behave like turbo button is always on. Activating/deactivating the turbo button or VGA overclock tool does nothing and therefore I have it uninstalled.

[Flagman]

But the core clock being stuck at 653Mhz is because you have not activated your turbo button. Just click the button on top called "Turbo" and it will light up orange. This will force your core clock to stay at 666mhz and also increases your voltage to 1.012V. If you have OCed through afterburner, then this will make it run at whatever core you set. If, touching the turbo button does nothing, make sure MSI's "VGA overclock tool" is running.

If you flash svl7's vbios, along with the other changes, it will also behave like turbo button is always on. Activating/deactivating the turbo button or VGA overclock tool does nothing and therefore I have it uninstalled.

Turbo button is just a relic from older MSI notebooks where it actually did something. In my GT70(Win7 + S-Bar) Turbo button acts as P1 button, so I can set other program to turn on after I press it, but it does nothing else. It lights up for a sec and that's it, doesn't matter if MSI VGA OC is running, with it running with admin privileges, with it set to run in P1, without it etc. As I said, there is no pattern AFAIK as to why sometimes it starts with 666 and most of the time(always with new OS) with 653.

The only difference I see is in VDDC. GPUZ reports it while playing like this:

1.0375 with old OS that started with 666Mhz, stays the same after OCing to +135.

1.0250 with new OS that has started with 653Mhz.

0.9750 with new OS after I set Afterburner to +135( it stays at 653). The more I OC in new OS the more it drops from 1.0250 to 0.9750. If I downclock few Mhz VDDC jumps to 1.0375.

[cresterk]

Turbo button is just a relic from older MSI notebooks where it actually did something. In my GT70(Win7 + S-Bar) Turbo button acts as P1 button, so I can set other program to turn on after I press it, but it does nothing else. It lights up for a sec and that's it, doesn't matter if MSI VGA OC is running, with it running with admin privileges, with it set to run in P1, without it etc. As I said, there is no pattern AFAIK as to why sometimes it starts with 666 and most of the time(always with new OS) with 653.

The only difference I see is in VDDC. GPUZ reports it while playing like this:

1.0375 with old OS that started with 666Mhz, stays the same after OCing to +135.

1.0250 with new OS that has started with 653Mhz.

0.9750 with new OS after I set Afterburner to +135( it stays at 653). The more I OC in new OS the more it drops from 1.0250 to 0.9750. If I downclock few Mhz VDDC jumps to 1.0375.

Are you sure that you have the retail version of gt70 from msi? Or do you have a barebones version? Mine works properly:

[Flagman]

Ofc its retail GT70 Anyway, after flashing svl7 vBIOS it looks like everything works as intended. Now it boots with proper 666 clock, and overclocking works like a charm. Didn't do a lot of testing, but no problems so far.

[cresterk]

No idea why the turbo button doesn't work for you. Anyway, it looks like your problem is solved. Good luck.

[theurden]

Hi,

I have the same problem with my MSI GT70 0ND... I'm using MSI vbios modified 675mx (2GB) - 80.04.58.00.14_'OCedition'_rev00.

Playing Diablo 3

With stock clocks 1.0370 VDDC

When I use nvidia inspector and overclock to 950mhz, voltage come down to 0.9750 VDDC and clocks as 666.

With 3DMark11: voltage 1.0370 and clocks 950mhz. I get a score +6000 in performance

Some bios to solve it? thx

[joe.ibrahim]

Ofc its retail GT70 Anyway, after flashing svl7 vBIOS it looks like everything works as intended. Now it boots with proper 666 clock, and overclocking works like a charm. Didn't do a lot of testing, but no problems so far.

Hey, Flagman, Im having the same issue, can you tell me how you solved yours? Thanks a lot in advance!