MSI R6850 Cyclone PE / OC Graphics Card
Author: Shawn Knight
Editor: Zahn Funk
Date: 06-27-2011
Provided by: MSI
Installation / Overclocking

I installed the R6850 in a system with the following hardware configuration:

Intel Core i5-2500K Sandy Bridge
Corsair Hydro H70 Liquid CPU Cooler
Corsair 2x 2GB XMS3 DDR3
Seagate 400GB HDD
FSP Group Aurum Gold 500
Corsair Obsidian 650D Chassis
Optical drive
Windows 7 Home Premium 64-bit

Everything in GPU-Z looks on target for the rated specs. Here we see a GPU clock of 860 MHz and the memory clocked at 1100 MHz with 960 shaders, all on a 40nm process.

This card is already factory overclocked but I will be using MSI Afterburner to push it even further. Normally I would just grab the latest version from MSI's website and use that, but in order to adjust all three voltage settings (Core Voltage, Memory Voltage, Aux Voltage), you need to use a newer Beta version. I found version 2.2.0 Beta 3 on RivaTuner's website so that is what I will be using today.

I will be testing at three different settings: stock 860 / 1100 MHz, the maximum stable overclock I could obtain without voltage modification (960 / 1135 MHz) and the maximum with voltage mods (999 / 1200 MHz). To obtain the max overclock, I had to max out each of the three voltage sliders (1300 / +50 / +30).

I also measured idle and load temperatures at all of the above settings with a constant room temperature of 75F. The fan controller on the Obsidian 650D chassis was set to low. Below are the results.

Note that I left the cooling fan set to Performance mode throughout testing.

Benchmarking is just ahead.

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