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Socket 478 Prescott help

post #1 of 27
Thread Starter 
OK, here's what's going on. My Dad has had a Dell Poweredge 400SC for a few years now, but the 2.4ghz Celeron wasn't pulling it's weight anymore, so he decided it was time to upgrade. We went from 256mb of memory to 1 gig, and the performance difference was noticable, but some operations still timed out. (He runs massive databases.) So, we decided to purchase a better processor, and I did some research, eventualy deciding on a Prescott 3.0E. (Socket 478, same as Celeron.) It arrived, and I tried to installl it today, but after the Prescott is installed, the power LED on the mobo comes on, but the systm won't boot. No beeps, no fans, no nothing. I though maybe I fried the mobo, so I put the Celeron back in and it booted and ran Windows fine. After looking around on Dell's site, I found a newer BIOS that supported processors with 800mhz FSB and added support for Pentium 4's.(Rev. a10) Downloaded and flashed, then put the Prescott back in, but same thing as before. I put the Celeron back in and went back to an older BIOS that offered the same things (Rev. a05), but upon inserting the Prescott, still nothing. I wondered if it was a PSU problem, not being able to give the new CPU enough juice. I pulled the Aspire out of my rig, and installed it in the server to no avail.

Dell, Intel, and several third-party sites state that with the BIOS update, the motherboard should support Socket 478 Prescott's with a 800mhz FSB. It seems like there is nothing I can do to make this new CPU work, so do you guys have any ideas?

Here's a link to the system:
http://support.dell.com/support/edoc...a0.htm#1039152

EDIT:
Oh, and I did reset the CMOS. Twice.
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post #2 of 27
Which ASUS motherboard is in that Dell?
    
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250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
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post #3 of 27
i m not sure about this but r u saying there is nothing at all when u boot up the system? does the cpu fan and if there is a fan on chipset operating? maybe it is low on juice.. or could also be the ram FSB. try to reset bios to default and crank it up again.
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OS - Raptor 74GB, 2xSeagate 80GB SATA DVD Drive, CDRW XP Professional SP 2 24" Dell WFP LCD Screen 
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post #4 of 27
Thread Starter 
Quote:
Originally Posted by cyrixMII300
i m not sure about this but r u saying there is nothing at all when u boot up the system? does the cpu fan and if there is a fan on chipset operating? maybe it is low on juice.. or could also be the ram FSB. try to reset bios to default and crank it up again.
Absolutley nothing happens, no fans, no clicks, no BIOS beeps. Just that little green LED burning away. It won't boot into the BIOS.

Oh, and I did reset the CMOS. Twice.
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post #5 of 27
Sorry, meant which INTEL motherboard
    
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E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
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CPUMotherboardGraphicsRAM
E8400 @ 3.8 GHz DFI LANPARTY DK X38-T2R eVGA 8400GS 2GB Mushkin DDR2 800 (single stick) 
Hard DriveOptical DriveOSMonitor
250GB WD SATA None Windows XP Pro 32-bit HP Pavilion f1703 
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post #6 of 27
Thread Starter 
I'll look for the model number, I've got it somewhere. It's based on the 875 chipset, though.
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post #7 of 27
that seems to me very much like a juice problem. but then again, the aspire sure packs enough power there with 450Watt. how bout temps? the prescott 478 produces lots of heat. try to unplug everything except the bare essentials like ram and display card. unplug the cdrom and hdrives. see if the fan operates now. if not i would have to say its a problem with juice but then it could also be a problem with bios. this is really strange.

edit

the 875 chipset does support prescotts.
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OS - Raptor 74GB, 2xSeagate 80GB SATA DVD Drive, CDRW XP Professional SP 2 24" Dell WFP LCD Screen 
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2012 Rig
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Q6600 2.40Ghz @ 3.6GHz VID 1.2375 Lapped Asus Maximus Formula SE MSI Geforce 8800GTS Crucial Ballistix Tracer 2x1GB PC8500 
Hard DriveOptical DriveOSMonitor
OS - Raptor 74GB, 2xSeagate 80GB SATA DVD Drive, CDRW XP Professional SP 2 24" Dell WFP LCD Screen 
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post #8 of 27
Thread Starter 
Quote:
Originally Posted by cyrixMII300
edit

the 875 chipset does support prescotts.
On Dell's website, upgrade #M5270 is a 3.4Ghz Prescott with 1Mb Cache and 800mhz FSB, and you'd think they'd only sell a compatible processor. If that one will work, why wouldn't the 3.0E that has the same specs except for a lower clock speed not be comatible?

I will check the model number again, could've sworn it was 875.
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post #9 of 27
Well you have Updated your Bios which is good but did you also try Resetting your C-mos mate as that may Help. When it comes to Power are you able to test With another PSU as that PSU your Using could be causing issues.
post #10 of 27
Thread Starter 
Quote:
Originally Posted by Dell
The PowerEdge 400SC uses the Intel 875P chipset, also known as Canterwood. For more information on this chipset, you can refer to this link on Intel's website.
Quote:
Originally Posted by Intel
For use with IntelĀ® PentiumĀ® 4 Processors with 512-KB L2 Cache on 0.13 Micron Process
It's because the 3.6 on Dell's site has 512 or 1mb of cache, but the 3.0E only has 1mb, isn't it...

@Enterprise: I have used both the Dell PSU and the Aspire in my rig, both of them will the LED on the mobo, but neither will boot.
I also cleared the CMOS, but it looks like I have to boot with the changed jumper for it to take effect. I'm going to pop out the battery now.
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