They do overclock alot worse than regular desktop chips, though. I ran them folding stable at 3.6GHz/1.15v for a long time (hot summer days included), but going higher was difficult - mostly because of the insane power draw (1250W, but peaks at 1300W+, causing my EPS cables to melt...). I have a feeling 4 GHz could be possible, unless something self ignites at 1.4+v :p Need a PAIR of ax1500i's for that project... Some PROPER EPS cables, and I wish I could add one more EPS connector to the board The free "slot" is not for power, someone at SM said when I asked if this was possible.