Guide on how to fix the clocks on your MXM Upgrade HD4670.
Kris Verbeeck
For some reason, the manufacturer of our HD4670 chose a slightly different arrangement of power states compared to a number of other cards we've seen. This means that, out of the box, it is limited to 400MHz core speeds instead of 675. Major difference, obviously. Not all is bad though: when clocked this low, the thermal output of the card is greatly decreased so it's great for initial trials or even if you prefer your notebook to be a bit cooler.
However, most folks will have invested in a gaming card by purchasing this module and will want to run at full speed. Luckily , there's a simple tool to do just that. Firstly, get yourself a copy of RBE (Radeon Bios Editor). Then, get the latest revision of ATIWinFlash.
Startup RBE. Click the Acquire/Flash button.
Click "Browse" to navigate to the location of your extracted ATIWinFlash files.
If RBE doesn't display the graphics adapter right away, hit "Analyze"
Hit "Acquire Bios" after which you should see something like this:
Click on the "Clock Settings" tab. You should get this:
The notebook reverts to the settings in the red rectangle for it's maximum performance while the maximum settings from the card are in the green rectangle. To remedy this, copy the settings from the green in to the red. We actually apply a modest undervolt when we do it, from 1,2 to 1,15V which helps reducing the temperature. 1,15V seems safe enough. Undervolting it further is at your own risk. You may run into instability or even inability to boot at all. Failures due to extreme undervolting or overclocking are not accepted for refunds or repairs. Anyway, you should have this:
When you do, hit "Acquire/Flash" again and hit the "Flash Bios" option.
*BEFORE YOU DO, MAKE SURE YOUR NOTEBOOK IS NOT OVERHEATING, HAS A CHARGED BATTERY AND IS CONNECTED TO MAINS!!*