How to lock a Radeon HD's clock speed?

[davidgolani11]

I have a flicker problem, apparently a common one. When my HD6670 video card switches between 100Mhz and 800Mhz I get a full screen flicker, it happens very often and is extremely annoying. It has happened since I installed it and no driver update to far has fixed it.
I've tried MSI Afterburner, set 2 profiles to 800Mhz but it still clocks down to lower speed / low power mode.

Sapphire is of course no help, and no amount of driver tweaking fixes it. I tried the HDMI output, the DVI output, both have the flicker.

So is there a way to lock the clock at maximum? Can the firmware be patched?

Thanks

 

[Tweak155]

Is this a power savers setting in Windows (assuming you're using windows)?

 

[Kenmitch]

Welcome to the forum

I'm not sure if it'll work or not on the HD6670 card or not but in the past a person would use Radion Bios Editor to modify the bios file and then flash it back to the card.

Cards shown compatable are the HD6850/HD6870 so I'd think it would also work on the HD6670.

Quote from the author

If you have a video card which is not officially supported, just give it a shot nevertheless

You cand find RBE here http://www.techpowerup.com/rbe/

You can extract your cards bios using Gpu-Z found here. http://www.techpowerup.com/gpuz/

Some instructions if you decide it's worth a shot http://www.techpowerup.com/articles/overclocking/vidcard/154

I used the above on my HD 5850 back in the day to flash a modified Asus bios that I modified the 2d, 3d clocks and voltages on.

 

[jamudin1]

power savers

 

[KingFatty]

That does sound like you can fix it by adjusting the speeds by editing the BIOS.

It's rather easy, and you can find a sweet spot where you keep the card from dropping below, so you still save power but don't let it go low enough where you get the flickering. It will still save power, but just go from 800 down to 300 (or whatever threshold you find that avoids flickering).

I'd suggest you follow the suggestion above, and what you could do is save your original BIOS, and then try something like 500 MHz and see if that fixes it. If so, then try 250 MHz. If that's too low, then try 350 MHz.

Essentially you may find that it's a simple matter of changing the lowest frequency to something like 300 MHz. Yeah that will use more power when idling, but who cares, it's worth the extra power consumption to avoid the flicker.

 

[davidgolani11]

Thanks for the links, I'm angry enough to risk bricking this POS card by trying to hack the bios. I have no interest in power savings, and frankly the HD6670 consumes so little power having a low clock speed mode is of little benefit.

I tried Sapphire Trixx but it has no effect either despite claims it can fix the clock speed and voltages. Trixx also has a rather bizarre bios export option but no options to edit or reflash the bios. Why export your bios if you can't do anything with it?

 

[Dravonic]

Try MSI Afterburner with the Disable ULPS option checked.

 

[notty22]

If you hook up 2 monitors, the card will not drop to the lowest power states. It keeps the memory running faster to stop flicker.