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DOA CPU

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February 24, 2010 8:25:10 PM

I get no beeps on start up and I'm down to Mobo and CPU w/HSF. Could my CPU be DOA? I already thought it was my mobo and did a RMA on the first one. This is my second mobo and it is doing exactly the same thing as the first one. PSU has been checked and both 24pin and 4pin are send juice.

More about : doa cpu

a c 159 à CPUs
February 24, 2010 8:57:37 PM

Does your board require a bios flash to work with your new cpu? You need to check the "cpu support" section for bios versions required for each cpu. I've never had a doa cpu in 19 years of building.
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a b à CPUs
February 24, 2010 9:01:25 PM

The absense of beeps is not always indicative of mobo or cpu failure. RAM is more commonly the failure, but that doesn't mean your deductions have no merit.
Please post the components of your build with their respective manufacturer specs.

For example,

Mobo: Gigabyte TA790GX AM2+ (Supports AM - AM3 45 nm CPU)
RAM: OCZ Fatality PC2 - 1600 (latency 7-7-7-15, 1.8v)
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a c 207 à CPUs
February 24, 2010 9:07:51 PM

First check, while it may seem obvious, does your motherboard have a speaker built in? Many dont these days.

Go through the boot check list from the homebuilt section, it covers the majority of issues and has a link to a site that sells case speakers if you need one
http://www.tomshardware.com/forum/261145-31-read-postin...

Also please post your full system specs.

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February 24, 2010 9:21:21 PM

Parts:
CPU: AMD Athlon II x4 620 2.6GHz Socket AM3, 95W
Mobo: Asus M4A79XTD EVO ATX AM3, DDR3, PCIe x 16, 140W CPU Support
Memory: Corsair DDR3 1333 (2x2gb)
Graphics Card: Sapphire Radeon HD 4670 PCIe x 16
PSU: Raidmax 530W

Asus manual says I should hear beeps if no memory is installed. Mobo has speaker and I also attached case speaker.

Other things I tried swapping memory one stick at a time in all 4 memory slots.
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February 24, 2010 9:24:30 PM

o1die said:
Does your board require a bios flash to work with your new cpu? You need to check the "cpu support" section for bios versions required for each cpu. I've never had a doa cpu in 19 years of building.



How do I do a bios flash if I can't get bios to display on monitor?
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a b à CPUs
February 24, 2010 9:29:10 PM

Your board should allow you to update the BIOS using USB.
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February 24, 2010 9:40:36 PM

hunter315 said:
First check, while it may seem obvious, does your motherboard have a speaker built in? Many dont these days.

Go through the boot check list from the homebuilt section, it covers the majority of issues and has a link to a site that sells case speakers if you need one
http://www.tomshardware.com/forum/261145-31-read-postin...

Also please post your full system specs.


I've have gone thru that checklist and was actually at the bottom of the list where he recommends pulling everything out and just running the mobo, cpu w/hsf, and psu and listening for beeps.
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February 24, 2010 9:53:01 PM

Asus.com says my mobo's bios does not need updating. Mobo is 1.01G and CPU only needs 1.00G. As long as CPU number is smaller or equal to current bios version than no updating necessary.
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Best solution

February 24, 2010 10:09:25 PM

Make sure you have your heatsink on properly. You could try seating it again but make sure you clean the old thermal paste off the cpu and heatsink and reapply new thermal paste. Also inspect the CPU for bent pins.

you could also try resetting the CMOS.

Another thing you should really think of doing is getting a new power supply. I don't think Raidmax has a good reputation for quality when it comes to power supplies. You may want to consider getting a power supply from reputable brands such as Corsair, Seasonic, PC Power & Cooling or Antec.
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February 24, 2010 10:49:57 PM

Checked and recheck CPU and HSF, pins look straight and drops in nicely into mobo cpu socket. Reset CMOS according to Asus manual, still nothing. Although I appreciate your opinion regarding the raidmax psu I'm using, it has been tested with a power meter and mine is working and does not seem to be the reason for my current dilemma.
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February 25, 2010 2:18:44 AM

Maybe there is a short somewhere in the case. Have you tried breadboading your system components? If that doesn't work maybe you should RMA your CPU?

I would still get a better PSU even though it might not be the problem now because an inferior PSU can cause problems in the future. It might be working but that does not mean it is supplying clean and stable power to your system. Hope things work out.
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February 25, 2010 8:22:36 PM

lol, no one seems to like my psu (I also started a thread under the new build forum). Someone else said that checking with power meter wouldn't tell me if my PSU can handle the load. I don't know how to check that so I asked him (still waiting for response). I am a little confused about the exact definition of breadboarding (seems to be thrown around alot with differing definitions). This is what I am doing. Minimal components just to get a POST response (cpu, hsf, mobo, psu, case power switch, and case speaker). Mobo is on a wooden block (old wooden cutting board (got that idea from another thread). I grounded myself and plugged surge protector into outlet (grounded and getting power). Does anyone know how to check if my PSU can "handle the load"

Numbers on the side of PSU:

AC Input: 110V/230 Vac ~ 10-6A 47-63Hz
DC Output: +3.3V +5V +12V1 +12V2 -12V +5Vsb
Max Output Current: 28A 34A 20A 17A 0. 8A 2.5A
Max Combined Power: 514W 16W
Total Power: 530W
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February 26, 2010 11:56:58 PM

Update: RMA ok'd by AMD. I told them everything I tried and I guess that was good enough for them. I will keep thread updated as I hear more from AMD. Thanks.
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March 9, 2010 6:47:38 PM

Update: AMD has shipped out new CPU, just waiting for it to arrive.
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March 9, 2010 7:13:15 PM

can't wait for the results, hope it solves your problem!
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March 11, 2010 2:36:01 PM

Great News! New CPU did the trick. Although frustrating, I learned a ton of troubleshooting techniques from this experience. Thanks for your help everyone. DOA CPU's do exist :p 
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March 11, 2010 2:38:01 PM

Best answer selected by iankorean.
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March 11, 2010 7:06:58 PM

Nice work! :) 
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