When applying thermal compound, you will get one of two outcome; It will work, or it wont. If you dont apply it right, your cpu will overheat. If you do put it on right, it wont overheat.
I have also seen one 6800GT out performing 2x 6600GT's. SLi is a dying technology. Intel has said that they do not like it, and are slowly doing away with it. It has many flaws. In theory it should work great, but it dosent. It should give you twice the performance, but it dosent. The perfomance increase is slightly noticable, but not too much. Go for the 6800GT, and if you want to go with SLi, save for another 6800GT.
The DFI Lanparty with the NF4 chipset is possibly the best mobo for an AMD you can get. Which AMD were you looking to get? The clawhammer, venice, what? If you are going to OC, go with the Venice. I would recommend the AMD 64 Venice 3200+ ( http://www.newegg.com/Product/Produc...82E16819103535
) if you look at how much of a price difference there is for any chip above that, it seems extremely superfluous.
At this point, it is not avisable to get DDR2. It is hugely overpriced, and dosent give you that much of a performance increase. Stick with DDR, Hyper Transport more than makes up for the non DDR2 memory. AMD platforms do not even yet support DDR2.
Originally posted by v6steve
Also, I'm going to uprate the cooling when I overclock the processor. Is it worth investing in watercooling or will an advanced air cooling system be enough.
It really depends on how advance. It is advisable to go with water cooling when Ocing. But if you really know what you are doing, you can totally get away with advaned air cooling. But if I were you, I would go with a really nice water cooling setup, possibly like the Aquarius III.