Upgrade problem ASUS M4A78 pro, AMD Phenom 550

**brendin44** · 08-13-2009, 10:20 AM

I have this weird trouble with the M4A78 pro board. Presently it runs lacking a trouble fair an AMD 6400 x2, 4GB of 800 MHz RAM (Kingston of 2 GB). Now I acquire the AMD Phenom 550 x2, but when I fix it in, it doesn't post (no video signal, no beep. I do notice the CD-ROM responding as well as my hard disk spins up although) I think the CPU is a bit more power starving, I separated my PCI-E card (Asus 3400) as well as all of the none necessary HDD’s (had 6 running in there) moreover left only my OS disk. Alas no go. Did someone meet any related problems, as well as if so, what was the resolution?

I think it will only run with 1066 MHz memory, but before I run of and go get it, I’d like to make in no doubt.

Any thoughts will be very much respected.

**allister fisher** · 08-13-2009, 10:23 AM

Go to Asus website as well as glance at the CPU compatibility list, you should have done that before you purchase. See if your motherboard supports Phenom 2 550's. If it does then you must have the wrong bios. You don’t require new memory.

**harddisk6564** · 08-13-2009, 10:25 AM

That motherboard definitely supports your Phenom 550 x2 as well as I believe the Phenom utilize less power than the 6400 (125W, I believe).

I think you're right about a memory upgrade. AMD shows the M4A78T-E as being well-matched with the Phenom 550 as well as that MB takes a least amount of 1066 MHz memory.