Is a bad DOA CPU that common?

[keakar]

I just got a bad CPU (my first one ever) so I was just wondering if this (getting a bad one) was rare and not all that common or it happens just as often as with video cards, mobo, and PSU like everything else?

I always thought CPUs were one of those things that are such detailed and expensive parts that every one gets tested to work before it is sent out. im not talking boot up and benchmarks but basic power up so you know it work kind of testing.

Don't they run basic power up tests on every one before its packaged?

(I upgraded my i5 to an i7 and it would not power up, it kept tripping my PSU and going into a power on/off loop and wouldn't even complete the computer startup)

 

[FordGT90Concept]

Very rare but possible. Pretty much everything in a computer is more likely to die than the CPU.

Addendum: did you upgrade the motherboard BIOS before switching processors?

 

[Jetster]

Check your CPU pins. Or rather socket pins

 

[keakar]

mobo has the latest bios and I reset the mobo pins and I pulled it and dropped the i5 back in and all is good so put the i7 back in (just in case it wasn't seated right somehow) and its back in the instant power on-power off cycle so its something wrong with the i7 (internally shorted I'm guessing) and I think its tripping my PSU short circuit breaker protection.

the cpu and computer is the one in my specs so its definitely enough power and its all compatible

for now im back to my old i5 4430

probably take newegg a month to test it and send me a replacement cpu, they are going down hill fast for customer service involving any returns or warranty stuff

 

[Jetster]

Going from an Haswell to the Haswell refresh requires a bios update. What BIOS do you have installed?

 

[Mathragh]

Happened to me once, CPU died within 3 days after arriving. Could hardly believe it myself but sent it back and their testing confirmed it also.

Of the 20-30 PC's I've built for people it happened just that once.

 

[qubit]

Yeah, CPUs can be faulty all right, but it is indeed rare.

My friend once was unable to read floppy discs on a PC (Pentium 3 days) which turned out to be a bad CPU, confirmed by Intel. Weird thing is everything else worked fine.

 

[95Viper]

Did you reset the BIOS?
Is the cpu power connected correctly and did you check your other power connections to the MB?
Try with different memory or one stick at a time.

However, it is a mute point now, since you sent it back...

Hope you get it worked out.

I have been lucky, I guess; I have never gotten a cpu doa since ordering my first cpu... an 8088 for a computer build.

 

[rtwjunkie]

Just as with any part they can be DOA, but CPU's are one of the rarest parts to arrive dead.

 

[keakar]

Going from an Haswell to the Haswell refresh requires a bios update. What BIOS do you have installed?

never heard of this before, a bios update is your mobo firmware and is what it is, there is no different version based on the cpu you use.

now if you mean did I reset the bios, then yes I reset the mobo to auto detect everything and set voltages and things accordingly

Did you reset the BIOS?
Is the cpu power connected correctly and did you check your other power connections to the MB?
Try with different memory or one stick at a time.
However, it is a mute point now, since you sent it back...
Hope you get it worked out.
I have been lucky, I guess; I have never gotten a cpu doa since ordering my first cpu... an 8088 for a computer build.

no this is not a new system or one I did a major upgrade on with a lot of new parts or any other changes made to it.

it is a system in regular daily use, it was shut down, bios pins shorted to reset the auto detect and then cpu were swapped out.

cpu were switched out twice to confirm everything works with the i5 but not with the i7

it would not even power on enough for bios to auto detect anything, it literally was an instant trip off as soon as the fans kicked on

 

[OneMoar]

never heard of this before, bios is your mobo firmware and is what it is, there is no different version based on the cpu you use.

now if you mean did I reset the bios, then yes I reset the mobo to auto detect everything and set voltages and things accordingly



this is not a new system just built or wuith any other changes made to it. it is a functioning system still in use, it was shut down, bios pins shorted to reset the auto detect and then cpu were swapped out.

cpu were switched out twice to confirm everything works with the i5 but not with the i7

Then you are pretty dam clueless
you need to update the bios to use a haswell refresh cpu
you need to update to bios version F8 OR F9
which you can get from here http://www.gigabyte.com/products/product-page.aspx?pid=4491#

 

[m0nt3]

My Phenom X4 9850 was bad, it would just cause BSOD every 15min or so. Got a replacement no more problems since.

 

[ChevyOwner]

If the bios does not support the CPU it will do exactly what you are describing. If you don't believe me ask me how I know...

 

[keakar]

Then you are pretty dam clueless
you need to update the bios to use a haswell refresh cpu
you need to update to bios version F8 OR F9
which you can get from here http://www.gigabyte.com/products/product-page.aspx?pid=4491#

clueless, not hardly, but I do forget things sometimes and this is an easy one to forget about sometimes but I never use mobo out of the box. the first thing I always do is update the bios on them and try to remember to recheck for new updates at least once a year

If the bios does not support the CPU it will do exactly what you are describing. If you don't believe me ask me how I know...

well I confirmed by bios version is F8 and F8 is "supposed" to fully support the i7-4790 so I don't see how that could be the problem but I upped it to F9 anyway. even though that's said to be just updated for "k" processors, perhaps that was my issue but I highly doubt it.

@ ChevyOwner - you asked me to ask you, so I will, how do you know this?

did you RMA one because you had the wrong bios?

 

[ChevyOwner]

No, in my case I was upgrading from a 3820 to the 4930K I have now. I forgot to update the bios before removing and selling the 3820 to a friend, but the motherboard has USB BIOS Flashback. So I used that to update the bios solving the problem.

 

[keakar]

No, in my case I was upgrading from a 3820 to the 4930K I have now. I forgot to update the bios before removing and selling the 3820 to a friend, but the motherboard has USB BIOS Flashback. So I used that to update the bios solving the problem.

lol, I bet you said a few choice words before figuring it out

I didn't notice the i7-4790 was a "refresh cpu" when I bought it, I just went with the best i7 I saw at a good price for my final upgrade option that was left to do for my old system.

what the hell does "refresh cpu" mean anyway? and what makes it need a more advanced bios then the i5 or a regular i7?

 

[rtwjunkie]

what the hell does "refresh cpu" mean anyway? and what makes it need a more advanced bios thde the i5 or a regular i7?

It means it's the 2nd Generation Haswell. Basically, Intel needed/wanted to keep moving forward, and needed a means to sell the Z97's and such. That's my cynical view, of course.

 

[Schmuckley]

No..
Bad mobo is like 90% more common.

 

[keakar]

It means it's the 2nd Generation Haswell. Basically, Intel needed/wanted to keep moving forward, and needed a means to sell the Z97's and such. That's my cynical view, of course.

my motherboard was designed to use i3, i5, or i7 cpu but could it be possible my motherboard isn't capable of using a newer second gen haswell i7?

 

[rtwjunkie]

my motherboard was designed to use i3, i5, or i7 cpu but could it be possible my motherboard isn't capable of using a newer second gen haswell i7?

You're referring to the H87? You'll have to check the cpu list on the motherboard website, and if it's listed, it will say which BIOS you need to run it. Then download that BIOS from the download section there.

 

[xfia]

any lga 1150 can support a second gen haswell (devil's canyon) with a bios update.. just left to manufactures to update the bios. the biggest difference is the thermal interface is better and of course there is different clocks on some models but no real architectural changes.

 

[OneMoar]

any lga 1150 can support a second gen haswell (devil's canyon) with a bios update.. just left to manufactures to update the bios. the biggest difference is the thermal interface is better and of course there is different clocks on some models but no real architectural changes.

there is how-ever changes to the power delivery "signaling" which is why you need the bios update

 

[xfia]

did not know that.. would that be how they kept a low tdp for the 4790k?

 

[keakar]

You're referring to the H87? You'll have to check the cpu list on the motherboard website, and if it's listed, it will say which BIOS you need to run it. Then download that BIOS from the download section there.

it comes out of the box rated to run the latest i3, i5, or i7 cpu but at that time there was no such thing ads the refresh haswells so its hard to say.

it comes boxed from the factory with the F5 bios which I upgraded to the F6 or F7 back in 2011 "I think" and last year I upped it to the F8

I have gigabyte @bios that finds and installs the latest bios for your mobo so I took what it told me was the latest greatest bios at the time as I always do

 

[Jetster]

Well as long as your have the latest BIOS it should work. RMA the CPU.

And I checked the CPU support list. Haswell Refresh requires F8