LGA 711 to 775 boot loop (E5472 on P35-DS3P)

[bjarke15]

So, I decided to repurpose my old Gigabyte P35-DS3P (rev. 1.1) using a Xeon E5472 and an adapter I found online. The adapter application went smoothly, but now I just can't get the darn thing to boot. It keeps looping with no monitor output. I have updated BIOS to latest revision, cleared CMOS and reseated RAM, all to no avail. It still works with the original Core 2 Duo (E8400) though.

I would appreciate any ideas on how to fix this. Do I have to install a microcode-injected BIOS from the get go? I've seen 771 CPUs on P35-DS3P rev 2.0, but maybe my rev 1.1 isn't as willing to accept LGA 771.

EDIT: Flashed BIOS with 771 microcode, still boot looping!

 

[RememberThe5th]

https://www.delidded.com/lga-771-xeon-microcode/

Yes you have to.

 

[bjarke15]

Yes you have to.

Thanks for your input Robert. Today, I reflashed the BIOS with 771 microcode but it still boot loops. I have a feeling the E5472 might be on the fritz, but it was comfirmed working before it was sent to me. I've also checked that the adapter is in place and that the CPU sits snugly in the socket.

 

[RememberThe5th]

The other tought , does it beep without ram stick?
Did you flash all the codes or your CPU code? I flashed all codes and risked that Q6600 wouldn't be loaded but luckly it was there same as E5800 which didn't work for some reason, but P4 520J works fine.

 

[bjarke15]

I flashed all 45 nmm 775 and 771 CPUs. I doesn't beep without RAM. Actually, I don't think the mobo even has a buzzer.

 

[RememberThe5th]

What are the ram sticks you have? With both sides chips or one side?

 

[bjarke15]

What are the ram sticks you have? With both sides chips or one side?

So far, I've been using RAM sticks with chips on one side. I have some two-sided DDR2 lying around that I could test with, if that could make a difference.

 

[bjarke15]

I tested with a two-side-chips stick and it goes to BIOS just fine now! Thank you Robert! Tell me, how did you come by this sorcery?

 

[RememberThe5th]

I know that there is high density and low density memory, high is more supported than lower (double sided vs single sided).

Sorry if didnt give you much information with this answer but this is only in 775 sockets.