HD 4670 downclocks automatically

B

Bobbarker

n00b
Joined
Sep 17, 2008
Messages
43
I used GPU-Z and at idle, my HD4670 core was at 165MHz while the memory was at 249.8MHz. At load, it was 750MHz for the core and 999MHz for the memory (actually, I think the memory speed is double that in reality).

Anyway, it also does that during games like when viewing a menu in UT3, it will actually go down to like 2fps. And GPU-Z shows the video cards alternating speeds while I have a game running.

From what I can see, this causes lag during the installation of UT2004 (bitmap images being refreshed block by block) and microscopic lag during Quicktime HD movie trailers. I don't want any lag at all and any slowdowns.
 
What brand card do you have?

I have a Sapphire and mine idles at 300/1000MHz. Under load it'll go up to 750/1000MHz but I haven't noticed any lag when it does this. My idle clock is a lot higher than yours, though, wonder why that is.
 
I have a HIS. I hope my choice of brand is not the cause.

I tried the solution from:
http://www.gamereplays.org/community/index.php?showtopic=348152&pid=4198980&st=0&#entry4198980

and I was still able to see the microscopic lag when looking at the images changing during the UT2004 installation. (Yes, I did use GPU-Z to see the speeds.) I can’t easily go back to an X1000 series card so I might just consider Nvidia next. I don’t know if it’s the chipset doing that with new generation ATI cards or if it’s just some feature of the new ATI cards.

When I’ll have more money I might just try out a Geforce 8800 GT or 9800 GT. I’m pretty sure if there’s some microscopic lag when someone moves their arm in a 1080p video that it might be still due to that little oddity whatever that I can’t put my finger on. It might be that the drivers are immature or that I did not install a valid copy of WinXP yet. I’m only going to install a valid copy once CAT 8.10 arrives.

If you wanted to see what you need to click on to do the same modification:
http://img136.imageshack.us/my.php?image=cccscreenme4.png

Here’s one screenshot of the default settings and then one with the modification (although I don’t know if that’s the right way to do it, I had video corruption for a second before it clicked back to normal).

http://img136.imageshack.us/my.php?image=profilescreen2bq3.png

http://img385.imageshack.us/my.php?image=profilescreen3hu4.png
 
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