CPU change and now can't boot

I changed my CPU from an Athlon II x4 overclocked to 3.5GHz to a Phenom II x6 1090T and my computer will not past POST. When I turn on my PC, my motherboard displays a red light next, which is indicated DRAM_LED. I did remove the overclock and reset the voltages and RAM clock, but it seems the board keeps rebooting to display this red light.
I have listed my specs if anyone needs more information.
Is 650w enough for a 6950, 8GB's RAM and a Phenom 1090T? I hope so

My BIOS has been updated to support this CPU.

Hi,

A few simple things:

Power cable firmly clipped in to mobo? Is the CPU shown in the BIOS? Did you update to BIOS version Version 2301?

Regards,
Golden

I have BIOS 1702 but I've seen someone run this CPU on the a BIOS from last year. The first 2 updates where for CPU compatibility, and if you check the list my CPU is compatible.

Yep - I saw from this list:

ASUSTeK Computer Inc. - Motherboards- ASUS M4A89GTD PRO/USB3

By browsing down to your CPU, I followed the link to the BIOS version I mentioned.

Is it powered up at all? Fan turning?

Yes, all the fans are on as usual.

You might try reflashing the BIOS with a fresh download, sometimes they get corrupted and don't install correctly.

Hi,

I had a bit of a quick hunt around, and found this. Does it look/sound familar? How does your thermal paste look?

[Solved] First build gone wrong: NO POST - General-Homebuilt - Homebuilt-Systems

Regards,
Golden