Issues with LGA 771 to 775
Issues with LGA 771 to 775
Hello there, I’m just starting out here and understand that what I’m sharing might feel a bit outdated. Still, it’s really important to me because I want all my saved OS and data backed up in the best way possible. My LGA 775 PC has been running smoothly for some time now, but I recently upgraded it to get a better temporary setup until I can build a gaming rig with a modern, powerful system. I began by adding RAM—DDR2 type, but only 2GB. To reach 8GB, I bought two unbuffered sticks, which worked fine at first.
However, problems started after the CPU upgrade. I didn’t prepare myself properly for this change. I got a modified Xeon E5450, but it didn’t receive any BIOS updates. The sticker adapter converted the socket from 771 to 775, and everything seemed okay until then. But then my PC began spinning without any display. I tried everything: reset CMOS, swapped the battery, replaced the fans, even used a different processor. Still nothing.
Now I’m stuck with a DC 7800p Convertible Minitower. The strange thing is that I’ve tried almost anything—error codes popped up, lights flickered, and the system would just shut down or keep looping. My motherboard appears to be functional, but it’s not displaying properly. I even tried a Quad Q9300 processor, which also didn’t help much.
I’m really unsure what to do next. Can anyone suggest a solution to get my original LGA 775 CPU working again? Any advice would mean a lot to me!
The sticker adapter exchanges two pins on an LGA 771 Xeon, allowing it to function on a standard LGA 775 board. Previously, it was a popular way to upgrade older C2D systems. A detailed guide is available.
The modified 771 Xeon uses only specific SERTEN chip packages. I believed the sticker allows updates and that the 771 to 775 version was a file-based change.
The issue involves a Q35 chipset with an Xeon E5450 that isn’t compatible out of the box, even after modifications. It doesn’t support overclocking and only allows basic changes. You mentioned you already received a refund and have a Core 2 Quad Q9300, which you own alongside your older Core 2 Duo. The problem seems to be that neither CPU is working properly, causing the PC to restart repeatedly and behave oddly when the Xeon is reinstalled. There’s some light and fans, but no display. You’re wondering how to fix it.
The sticker is meant to enable contact with various socket pins, and I already have it installed. The issue lies in my late realization that it wasn’t compatible with my chipset—there were problems from the start. I’m curious why simply swapping other processors from the same socket didn’t fix the problem. This is what I need clarified.
If it's an MB, it might not be safe to use, which could cause harm to the device. Just a guess.
But why or how exactly? This problem should be solvable, especially after running several tests and seeing an old forum post where someone swapped their old CPU and it worked perfectly. I just want to understand how an incompatible processor might cause damage. That seems almost impossible—my motherboard, even though it’s old, still beeps error codes and behaves strangely. The BIOS should have fixed it by itself, but maybe I misaligned some socket pins or something. If you have any suggestions, please let me know. Otherwise, I’d like to ask if buying a new LGA 775 motherboard and reinstalling all my hardware would let me boot into Windows 10 with everything restored. I know Windows can be tricky, so I’m reaching out for guidance.
If it mostly functions well, I might try it only as a backup option. I’m okay with some small mistakes or restarts, but I require at least 90% of the system to run smoothly right out of the box. I hope Microsoft handles Windows better.