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Originally Posted by aaronspink
There is basically no point in water cooling the ram on either a 6800 GT, a 6800 Ultra, a x800 Pro or and x800 XT. The ram doesn't get hot enough to matter. It certainly isn't thermally stressed.
There appears to be no difference on ram overclocks with no cooling and with sinks with active fans. It just doesn't get hot enough to matter. You are talking maximum thermal dissapations of under 2W. DDR3 != DDR2.
You can spend the extra money for the DD block that also cools the ram, but it is all bling for no zing.
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Aaron, I have to say I agree. I just installed a used Swiftech MCW50 on my 6800 GT. That leaves the RAM exposed with no "heatsinks." I have a modest 80mm fan Vecro'd on top of my pump that points at the RAM and my RAM is overclocked to around 1070. After running RTHDRIBL, the bare RAM only gets to 52 - 55 degrees Celsius according my Compunurse probe. That doesn't seem too hot. I actually have 8 copper RAM sinks lying around, but I don't think I'm going to bother to put them on. My RAM doesn't reach the speeds others have reported, but I don't see RAM sinks performing any miracles.