First a disclaimer:
I am offering this info to help, there is alot of risk involved with the solution I have found.
OK where to start, I have been searching high and low for a way to get past the 700mhz "wall" that is imposed by CCC. currently there is only 1 known tool that can clock a 4XXX series GPU beyond 700mhz it is the AMD GPU TOOL, however the edition that is needed for HD48XX's is not publicly available ..yet.
I have been in contact with lots of people who have worked very hard on this issue, and most don't even have a card to test with , so I have been their Guinnea pig , so to speak.
I tried all of the usual suspects and found none able to raise the speeds properly. I even flashed bios's repeatedly with no change.Then W1zzard put me in contact with BAGZZlash, who is an author of RBE. or Radeon Bios Editor. I had tried it several times and while it could identify and modify the bios's it would not take effect once flashed to the card.
Today BAGZZlash and I chatted on MSN Messenger and he asked me to change all of the clockss in the settings tab, which I did (2-d as well as 3-d). and It worked!!! I have had many issues throughout the day with it but the flashing and changing has been easy. the hard part is the fact that once you raise the voltage the lack of powerplay rears it's head. I was experiencing graphics corruption, reboots etc. all after sucessfully completing a bench. when it is time for the driver to drop back to 2-d it doesn't like the core being so high.
750mhz needs about 1.35v or more to pass crysis bench, also the 3DMark stuff. but Grid was fine with less voltage. at 800 it can run the benches but when it ends the screen gets corrupted......scary, if you've ever lost a card you'll know what I mean. and to get 800 I needed 1.5v which I believe is the reason for the 4870 using a higher quality power circuit.
Water cooling is a must for this procedure. these little buggers get hot, and increasing the voltage makes them immediately unstable unless you can keep them cool. I am using Danger Den Maze 4's and a d-5 pump along with a 120.2 rad all in my case. they fit fine just like the 3850's, the shim is not an issue for these and most common blocks.
I'd like to keep this thread for people to post up their findings. we will soon have software to clock with but in the mean time this is it. and it has risks involved. make sure you have a way to flash back in case you get a corrupted flash or something is set too high.
this thread is useless without pics so here is one, keep in mind this is not a great score, no tweaks just raw clocks. I am on a very bloated install of XP while I do my testing,The best I will save for HWBOT..
[IMG][/IMG]
so basically here is the procedure:
1. save your original bios. GPU-Z is what I used to extract the bios. I make several copies including 1 I saved on a flashdrive.
2. open the bios file with RBE. then mod all of the clocks in the clocks tab (obviously not all need modded but it is what it took for mine to work.) this thread is to find out which ones will need to be changed and which won't!. I CAN ONLY TEST SO FAST BUT WITH SEVERAL OF US WE SHOULD BE ABLE TO NAIL THIS DOWN SOON.
3. save the file after it is modded.
4. Use winflash to flash the newly modded bios, reboot and test.
This is still in the trial and error stage, please don't flash unless you are aware of the risks. I appologize in advance if anyone damages their card attempting this.
I debated on wether or not to post this without having the bugs ironed out, but I knew that many testers would be better than just one.
Here is what you will need:
GPU-Z 0.2.4 : http://www.techpowerup.com/downloads/SysInfo/GPU-Z/
K404's volt mod thread: http://www.xtremesystems.org/forums/...d.php?t=190990
RBE , latest: http://www.techpowerup.com/downloads/Utilities/RBE/old/
winflash latest : http://www.techpowerup.com/downloads...h_2.0.1.1.html
Many thanks to W1zzard , Crackerjack, BAGZZlash, K404 and I know I am forgetting some but I can edit them in later
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Originally Posted by Miwo
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