If you're going to dive in, head for the deep water. The 8KHA+ is an excellent board, that's what I have. At this time there are three choices for you: Take an 8KHA+ w/266 DDR, get an 8K3A+ w/333DDR, or wait for DDR400 mem to arrive and get the 8K3A+. DDR is definitely better than SDRAM. I've got an 1.4Ghz Athlon running just under 1.6 with resonably low temps. I would recommend a good heatsink that works. Again, my personal favorite is the Millenium Glaciator II with Artic Silver II. You definately don't want to cut corners on your cooling. As a limiting factor, the temps you will see depends on cooling, fsb, multiplier setting, voltage changes to stabilize the system, and plain luck. My friends, and others that I trust, suggest that you should try to keep your loaded temps in the mid to upper 40 c's. Though it is withing specs to go higher, it will generally lower the life expectance of the processor and memory. If you want to overlock 24/7 I am sure that some of the good folks running Seti or Folding can also provide some excellent advice. As an added hint (no charge for this one) Get the Crucial DDR memory. You won't regret it. Good Luck!