ATI HD4800 Review Thread

[halo112358]

Then I'll ask you two things if you don't mind

1 - Have you tried the 160MHz clocks at idle?
2 - When UVD is active, the card uses 750MHz? If so, I'd try to lower it to 160MHz too. The 3870 uses 700MHz when UVD is in use, but it works just fine with the standard 2D clocks of 300MHz, so I lowered them via BIOS.

I'd do this myself but I don't have my card yet

I haven't messed with bios clock changes, I'm still playing with the card through CCC. I have a feeling it's going to take water to really push the core (lotsa heat) so I'm just using it normally for now.

Here are the clock state profiles (UVD is using 4/5/6 for low/med/high)



From this you can see that the card doesn't ever clock down below 500 on the core and the ram doesn't clock below 900 ever. I kinda wonder if they had issues with the ram during power state changes. I also heard rumors about one of the manufacturers having a fixed bios out that enabled better powerplay functionality, so I'll see if I can find it and try it out.

[bill_d]

I haven't messed with bios clock changes, I'm still playing with the card through CCC. I have a feeling it's going to take water to really push the core (lotsa heat) so I'm just using it normally for now.

Here are the clock state profiles (UVD is using 4/5/6 for low/med/high)




From this you can see that the card doesn't ever clock down below 500 on the core and the ram doesn't clock below 900 ever. I kinda wonder if they had issues with the ram during power state changes. I also heard rumors about one of the manufacturers having a fixed bios out that enabled better powerplay functionality, so I'll see if I can find it and try it out.

it's just powerplay not working yet read someware it will be fixed with drivers

[STaRGaZeR]

I haven't messed with bios clock changes, I'm still playing with the card through CCC. I have a feeling it's going to take water to really push the core (lotsa heat) so I'm just using it normally for now.

Here are the clock state profiles (UVD is using 4/5/6 for low/med/high)



From this you can see that the card doesn't ever clock down below 500 on the core and the ram doesn't clock below 900 ever. I kinda wonder if they had issues with the ram during power state changes. I also heard rumors about one of the manufacturers having a fixed bios out that enabled better powerplay functionality, so I'll see if I can find it and try it out.

Looking at that pic the only thing you have to do to have proper PowerPlay is change clock 1 to 160MHz and 1.04v, and about UVD it only has on/off (using/not using), only two power states, so you can discard clock 5. Off is 2D clocks (500 in this BIOS), so I guess it will use 750MHz when decoding.