I have an IP35 Pro that I've been running with 4GB (4X1GB) of mixed ram for some time. I want to upgrade to 8GB (4x2GB), but I can't get the system to post with any combination of ram over 4GB. I bought 4 new 2GB matching DIMMS, but any time I try to boot with 3 or 4 sticks, the system hangs on boot with a 4E error. Any ideas I should try? I've tried manual timings, lowering the ram speed, increasing ram and NB voltage, but am willing to try other things before I send the RAM back.