E8400 on P5B - No POST

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Morrandir

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Mar 23, 2013
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10,510
Hello there!

I just tried to upgrade my CPU from Intel 6300 to E8400 on P5B and have no POST.

Before the upgrade my system was running fine with BIOS revision 0509. What I've done so far:


As mentioned, nothing happens on reboot. Black screen, no POST, no beeping. CPU and GPU fans are blowing.

I'm running 2 modules of Kingston DDR2 800MHz 2GB (KVR800D2N6/2G). I tested with 1 module of Kingston DDR2 667MHz 1GB (kvr667d2n5/1g). Same result.

I'm quite new to all the BIOS, overclocking, CPU upgrading hardware stuff... and I'm stuck now.

Any ideas?
 
Solution
atomicWAR
it does only state beta support for 1333mhz FSB on the support page. you may be able to run it on a 1066 fsb but you'll lose CPU speed increase and the point of the upgrade unless it lets you set a different multiplier for the cpu in bios. however you would be limited on how much you can crank up the multiplier since your cpu is not an extreme edition.

you may be better off with the old cpu.
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atomicWAR

atomicWAR

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Sep 4, 2007
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try reseating all your ram, power connectors, add in cards, etc. if that doesn't help try putting the old cpu back in...if it doesn't work then you likely killed your motherboard with static when you were working on it or your psu died. if it does work then the new cpu is faulty likely faulty.
 
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M

Morrandir

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Mar 23, 2013
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10,510

What exactly do you mean here?


I already switched back to my old CPU... works like a charm.
 
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Morrandir

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Mar 23, 2013
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The "new" CPU isn't actually new but was running in a friends machine before.

So the RAM couldn't be a problem there? I heard about compatibility issues.

Did I understand correctly that the BIOs automatically switches to FSB 1300? Or do I need to something manually (with the old CPU installed)?
 
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atomicWAR

atomicWAR

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Sep 4, 2007
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you shouldn't need to clock the bus on the other cpu...when u flashed the new bios it should have brought that support to it....same with the ram. you (or your friend) may have fried just the cpu with static. your friend still have his board so you can test it in something else?
 
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atomicWAR

atomicWAR

Glorious
Ambassador
Sep 4, 2007
6,590
795
44,490
it does only state beta support for 1333mhz FSB on the support page. you may be able to run it on a 1066 fsb but you'll lose CPU speed increase and the point of the upgrade unless it lets you set a different multiplier for the cpu in bios. however you would be limited on how much you can crank up the multiplier since your cpu is not an extreme edition.

you may be better off with the old cpu.
 
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Solution
M

Morrandir

Honorable
Mar 23, 2013
5
0
10,510
Ok, happy end: I just gave it a last try, reinstalled my old CPU, took out the mainboard battery for some minutes, did a cmos reset and reinstalled the new CPU.

Works fine now. Don't know why... but I don't care right now. ;)
 
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