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Doing ATI's Crossfire with DFI, HIS and Crucial

By: Shawn Baker | AMD CrossFire Articles in Video Cards | Posted: Dec 2, 2005 5:00 am

Overclocking the System


Overclocking of our system is done in two parts; firstly we overclocked the processor which also overclocked the memory. Once we found a stable setting in Windows and we are able to run some of the more strenuous benchmarks without any trouble, we then move onto overclocking the HIS graphics cards.


ATI RADEON X850 CrossFire Edition, (256 MB) Graphic Card

The DFI BOS is absolutely full of different settings and just about everything can be adjusted down to the tee. While we have been able to see our X2 achieve clocks of around the 2.6GHz mark today we didn't have that kind of luck.


The maximum stable overclock we found with the DFI Crossfire motherboard was 2.35GHz. This was achieved at a front side bus of 235MHz which is nothing to sneeze at. This is almost a 20% increase in CPU speed and considering we still find ourselves quite new to the BIOS on offer from DFI, we have no doubt that the board is able to achieve more with some tinkering. At this speed we also ran the memory at 1:1 which is still under spec for the Crucial modules so we would be a bit worried if we ran into troubles with the memory.


Moving on to the HIS graphics cards we find ourselves loading up old faithful ATI Tool to see what we can do. As far as we can tell when it came to overclocking it would seem that we are only overclocking the master card which comes stock at 520MHz on the core and 540MHz on the memory. We were able to increase this to what was a quite impressive 586MHz on the core and 609MHz on the memory or in DDR this is 1218MHz which is quite a nice memory speed.


A quick run down shows that @ stock speeds our X2 3800+ runs at 2GHz and the X850XT Master Card runs at a stock core speed of 520MHz and memory speed of 540MHz or 1080MHz DDR. The overclocked setup finds our X2 3800+ running at an increased rate of 2.35GHz and our X850XT Master Card being increased to 586MHz on the core and 609MHz or 1218MHz DDR on the memory.


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