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Maximum PC Guide to Extreme PC Mods (Maximum PC Guide To...)
By Jon Phillips
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Home » Video
XFX Overclocked GeForce 7950 GX2 (PV-T71U-ZDD9) Review
Author: Gabriel Torres and Cássio Lima
Type: Reviews Last Updated: June 28, 2006
Page: 2 of 10
$ Check REAL-TIME pricing for VisionTek RADEON HD 4850, (512 MB) PCI Express Video Card $
Best Buy: $179.99 Circuit City: $199.99
Dell: $179.99 TigerDirect.com: $184.99
Compuvest: $322.22 Newegg: $270.00

XFX GeForce 7950 GX2 M570 1GB DDR3 XXX (PV-T71U-ZDD9)

We disassembled this video card to take a look. On Figure 5 you can see the two printed circuit boards used by this card. A small PCB that you can see on the lower board connects them. The switch chip is located on the lower card and the video card cooler refrigerates it.

GeForce 7950 GX2
click to enlarge
Figure 5: Video card disassembled.

We removed the lower card heatsink to take a look. It is far smaller than the heatsink used on GeForce 7900 GTX and different from the heatsink used on GeForce 7900 GT, which is all copper-made, while the heatsinks available on GeForce 7950 GX2 are aluminum-made with copper-made base. They refrigerate all memory chips (the heatsink used on GeForce 7900 GT does not touch the memory chips) and also the switch chip on the lower card.

GeForce 7950 GX2
click to enlarge
Figure 6: Lower card with its heatsink detached.

Each printed circuit board has eight GDDR3 512-Mbit 1.4 ns chips from Samsung (K4J52324QC-BC14), making 512 MB for each board and 1 GB total. These chips can run up to 1.4 GHz (700 MHz DDR). On this video card the memory chips are overclocked and run at 1.55 GHz, 150 MHz (10.71%) above the maximum clock rate labeled for these memory chips.

On Figure 7 you can see the switch chip used to connect the two GeForce 7950 chips to the single x16 PCI Express slot.

GeForce 7950 GX2
click to enlarge
Figure 7: Switch chip.

On Figure 8 you can see one of the GeForce 7950 chips used on this video card. As you can see, it is internally called G71-D by nVidia.

GeForce 7950 GX2
click to enlarge
Figure 8: GeForce 7950 chip.

Pages (10): « 1 [2] 3 4 5 6 7 8 9 10 »
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