I have an Intel server with an SE7520BD2 motherboard. It has 2 GB RAM, Intel SRCS28X Raid controller, 5x250GB drives in RAID5 Array, plus one hot spare. OS is Server 2003 SBS. This server is very slow and it's doing a lot of work - Exchange server, file server, OWA server, TrendMicro antivirus, backups, etc. I would like to increase the RAM to 4GB to improve performance. I ordered RAM from Crucial and installed. The server would pass post settings, begin loading Windows, then reboot. Crucial replaced the RAM - same problem. Since the original two sticks are Kingston KVR333S4R25 / 1G, I decided to order the same part for the additional RAM. But I get the same problem. Do I have a defective motherboard? I'm currently running Memtest 86 and have not found any errors yet. Any ideas???