Hi, I'm having a problem with this mod.
I bought a modded Xeon E5450 from eBay and I followed all the instructions to inject the microcode in the BIOS (the first time before doing the BIOS modification step, Windows 10 wouldn't boot, but after that, boots and CPU-Z recognices the Xeon CPU). The problem is that my system reboots itself randomly after the modification and I don't seem to find the cause.
My system specs:Xeon E5450
Radeon HD 7850 1GB
4GB RAM Kingston PC-6400 DDR2 800MHz
Nox Urano 500W PSU
I've read in some forums that it could be a problem with the PSU, but after the modification it worked. I've tried reinstalling the modded BIOS and reinstalling Windows 10, but problem persists.
Now I'm trying overvolting CPU to 1.3V and see if it solves the problem.
(Usually, the random reboot occurs while doing heavy stuff like a stress test or gaming, but also sometimes when doing regular stuff).UPDATE 1:
Overvolting didn't solve the problem, I've just run a stress test and the PC just rebooted.Warning: Spoiler! (Click to show)
Stock CPU voltage (1.2V) and disabled CPU Enhanced Halt (C1E), CPU EIST Function and Virtualization in BIOS. CPU crashed with BSOD (KMODE_EXCEPTION_NOT_HANDLED)
(This is new).UPDATE 3:
Tried with CPU voltage 1.25V, RAM voltage +0.075V, MCH voltage +0.10V. PCIe frecuency set to 100Mhz and the rest of settings on stock values. PC reboot when doing stress test.UPDATE 4:
Trying stock settings but now I plugged the PSU cable in a different plug. PC reboot while doing stress test.UPDATE 5:
Xeon E5450 working on ArchLinux. Runs Mprime + GPUTest and no random reboot. I think that the problem is related to Windows 10 or the BIOS microcode. Now I'm gonna try with my Core 2 Duo E8400 on Windows 10 and see if it reboots.Warning: Spoiler! (Click to show)
Core 2 Duo E8400 seems to work fine for the moment.UPDATE 6:
Something weird happened. After testing the Core 2 Duo and checking that worked fine, I put back in the socket my Xeon E5450. Now the PC doesn't reboot (after +20 minutes in stress test) but only 2 cores are detected and runs only at 2.66Ghz. It performs like the Core 2 Duo.Warning: Spoiler! (Click to show)
I forced Windows to recongnize all 4 cores with this method: https://www.youtube.com/watch?v=bXLDhR1FMqQ
But now my PC reboots again. No solution for now.UPDATE 7:
I've overvolted the CPU over 1.4V. Seems stable but it runs pretty hot. PC REBOOTSWarning: Spoiler! (Click to show)
CPU voltage set to 1.375V, the rest of configuration in stock settings. System not rebooting for now. Seems stable. I'll try to keep lowing the voltage until it gets unstable again. PC REBOOTSUPDATE 9:
Minimun voltage archived without rebooting was 1.35625V but CPU still hot (over 80ºC). Now trying lower voltages and changing other MOBO voltages like MCH and FSB. PC REBOOTSUPDATE 10:
CPU running at 2.66GHz, no reboots, voltages set to AUTO in BIOS. PC REBOOTSWarning: Spoiler! (Click to show)
At the end, CPU not stable even at 2.66Ghz, PC just rebooted after some time gaming.UPDATE 11:
After getting some BSOD and reboots, I've decided to reinstall Windows 10 and reset the BIOS. After that I've tried different voltages without success. The most stable configuration by now is (1.225V, PCIe 100MHz, 320MHz Bus Speed, SPD 2.5)
but I'm getting low performance in games, a lot of stuttering and frame drops. The CPU is running at 2.7GHz.UPDATE 12:
I think I've fixed my performance issue with the Xeon E5450, I followed this steps:1) Swaped RAM modules.2) Mod the BIOS again and install it.3) Also I've followed this tutorial and used this program to use microcode in case BIOS microcode didn't work: https://labs.vmware.com/flings/vmware-cpu-microcode-update-driver#summary
*4) Set BIOS settings to most stable setup.
No FPS drops, no reboots. Smooth 60 ~ 50 FPS gameplay.
point I think it works if you DON'T want to mod your BIOS.Edited by HaleyBang - 6/2/16 at 12:46pm