On Figures 2 and 3 you can see nVidia’s GeForce 6800 GS reference board.

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Figure 2: GeForce 6800 GS reference board.

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Figure 3: GeForce 6800 GS reference board, back view.

We disassembled the video card cooler to take a look and we found out that its heatsink is made of copper, as you can see on Figure 4.

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Figure 4: GeForce 6800 GS reference board heatsink.

This video card uses eight GDDR3 256-Mbit 2 ns chips from Samsung (K4J55323QF-VC20)to give it 256 MB of video memory (256 Mbits x 8 = 256 MB). These chips can run up to 1 GHz. Since this video card accesses the memory also at 1 GHz, there is no headroom for overclocking the memory inside its specs. Of course you can try overclock it over its specs.

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Figure 5: 2 ns GDDR3 memory chip used by nVidia GeForce 6800 GS reference board.