XFX 9800GX2 Quad SLI

Installation & Test Setup

I don't normally endeavour to go into the specifics of 'how to' concerning installations but I feel this may be of some use to anyone wishing to go SLI or indeed Quad SLI.
The installation was really very easy. I was actually quite surprised at how simple it was considering the headaches I have had in the past with the 7950 GX2 Quad SLI. I simply installed Windows Vista with one card, installed the relevent updates and chipset drivers and the latest graphics driver from NVidia, when prompted to reboot I did so. Next I shutdown the system, inserted the 2nd 9800GX2, attached the SLI bridge and PCIe cables and booted back up. SLI capability was detected straight away.
Enabling SLI was again straightforward. The Installed Nvidia control panel with the 175.16 driver release from NVidia was a breeze to use and after applying the change from do not use SLI to Enable SLI the screen went blank a few times as the drivers were installed for the second card. I should note that when the first driver is installed it actually installs the driver twice, once for each GPU and so it seemed the same thing was happening when the second card was installed. So after the snap crackle and pop installation procedure I enabled the SLI visual indicator to check all was well and sure enough Quad SLI was working!
Test setup
As we will be benchmarking a 'top of the range' GPU setup it's only right that the rest of the components should be specced to match. The Q6600 was overclocked to 3.8ghz in order to erradicate any CPU bottlenecks allowing both test rigs to 'breathe more easily' as it were. Unfortunately we didn't have a DDR3 Intel motherboard capable of PCIe 16x and crossfire, however the Crucial ballistix 8500 were overclocked to compensate and with lower timings than DDR3 so the differences would be negligable but this should be taken into consideration when comparing the results of both systems. Other than that the systems are identical to one another and should make for quite a pairing when the two go head-to-head.
As you can see below the cards are very closely matched on paper with the 3870x2 having a higher core clockspeed and the 9800GX2 having a higher memory clockspeed. The 3870x2 is however £80 cheaper at the time of writing so ATI have a clear advantage in the price war.
Lets take a look at how the benchmarks went....
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Most Recent Comments

22-06-2008, 11:31:57

nice review mate,and very impressive results.However I can safely say that there is no way I could justify spending that amount on gfx cards,but would love to try it outQuote

22-06-2008, 11:49:45

Yeah it's alot of money to fork out on GPU's and I don't think I could justify paying that much but before doing the review I was more than content with my quadfire setup...now I have my doubts after playing with the Quad SLI setup.Quote

22-06-2008, 12:01:34

Very nice mate very in depth

whens the 4870 crossfire and 280gtx reviews?Quote

22-06-2008, 12:07:58

nice review... shows everything i wanted to see here.. too bad i cant afford the gx2's. 48*0's should be good though. wouldnt mind seeing a review comparing these to the G260/280


22-06-2008, 12:09:30

looks good

but yea, a 4870 in crossfire also would have added nicely to the comparison

but i'm guessing you can only do so much Quote

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