ATI 4850/4870 voltmod thread

[DemonEyez]

You should take a look on the sensors tab (second tab), not on the first one.
The speed reported on the first screen is what GPU-Z reads from the bios, and does not have be the true clockspeed in some cases.

I discovered there is a gap concerning the mem speeds.
1100MHz in bios gives 1100MHz in GPU-Z
1125MHz in bios gives 1125MHz in GPU-Z
1130MHz in bios gives 1125MHz in GPU-Z
1135MHz in bios gives 1125MHz in GPU-Z
1140MHz in bios gives 1125MHz in GPU-Z
1145MHz in bios gives 1125MHz in GPU-Z
1150MHz in bios gives 1150MHz in GPU-Z

These readings are reported in the sensor tab of GPU-Z, there my true memspeed would be 1125MHz, but in the first screen it would report 1140MHz (as was edited in the bios)

The same thing happens @ 1000MHz as reported in review on Techpowerup.com:

When changing memory clocks I noticed that the step size (with the software I used) is 25 MHz, so you can only OC to 1000 MHz, 1025 MHz and 1050 MHz - quite a limitation. After 1050 MHz the steps become smaller again.

http://www.techpowerup.com/reviews/MSI/HD_4850/24.html