The 8K7A will probably overclock slightly better than the 8KHA, but other than that the only difference is the chipset. The KT266 chipset in the 8KHA might be slightly slower than the AMD 761 based 8K7A, but nothing that should be noticeable except in benchmarks. Either board should be a good choice. If you are new to building your own system, I would choose the 8KHA just because it is completely jumperless so you would not need to mess with jumpers or dipswitches. Basically, if you are going to do some serious overclocking, than the 8K7A might be a better choice. If you just plan on building the system and not overclocking, or o/c'ing just a little, than the 8KHA should be a good choice. Either board will perform excellent..🙂