It's very likely an issue of the memory or maybe the fsb limits of the northbridge chipset . I don't know what's the highest chipset fsb most EPOX 8K7A reaches but if it's common for other user to get 160Mhz than you'll just have to fiqure out the limit of the memory. Not many ram can handle 160Mhz Cas3, let alone Cas2. Even my PC150 Cas2 ram can't go higher than 154MHz Cas2 and can't reach 166MHz Cas3. All memory are not the same, some are very fast and some are not, all depends on your luck. I have to say 150MHz is not bad for a ram that is rated at 133MHz DDR. If you really want to get to 160Mhz fsb, make sure the chipset can take it. The only way is to buy some tested 160MHz+ Cas2 ram. Why waste more money on an already awfully fast PC, so just forget about it.