I'm looking to overclock my 128mb ATI Radeon 9800 Pro.The GPU will be cooled via Arctic Cooling VGA Silencer. My question is, while looking into RAM sinks for it I've come across many different brands with varying prices depending on manufacturer and material. Does a name brand such as Vantec produce lower temperatures than say a Thermaltake sink? I'm looking into copper and and a pack of 8 Vantec costs 14.99 versus TT's 7.99.