A while back I bought a case that came with a 420W PSU. The 12V rail was not good enough to handle the Athlon 64's. So I bought an Aspire PSU that would be able to handle the 64. The only problem is (and not really sure if it will be a problem) that when I installed it into the case I had to turn it upside down. That is the only way that it would fit into the case? The fan on the PSU is now on the bottom instead of the top like it should be. There is a case fan that will be blowing on it right above the PSU also. Will this be a problem at all? I did not think it would be and have not been able to try the computer out yet as I still need to get a hard drive and memory. Thank you for your help.