Motherboard Replaced, New issues

[austin835]

Well, a friend of mine built an AMD FX-8120 computer (other specs listed below) and got it working. well, after a while, one day he decides to turn it on one day and it would not turn on (working the previous day) so he was like "what the heck?!" anyways, we found out that the motherboard was bad and needed to be replaced (we tried parts in another computer and they worked fine) so we contacted ASROCK and got a replacement, upon hooking the replacement up with all of the parts, pressing the power button yields no effect whatsoever, the computer acts as if it is getting No power. (again PSU was checked, and another PSU of a lower wattage was tried to ensure that wasnt the issue) so whats going on here? do we need to complain about DOA, or is there something we are missing? any help is appreciated, thanks.

SPECS:
Processor: AMD FX 8120
Memory: 8GB G-skill ripjaws 1600Mhz
GFX Card: AMD radeon 7770 (HIS)
Motherboard: ASROCK N68C-GS FX
PSU: Apevia 750-watt (dont know model #)
Any other spec. needed, just ask, thanks.

 

[austin835]

oh also, when the first motherboard went bad, by unplugging the CPU power, we could get the computer to power, but not POST, which is different from this case, wherein the computer does absolutely nothing.

 

[MagnusTheBrewer]

You need to start at the beginning. Do NOT assemble everything and THEN try to troubleshoot. Start with the MB outside the box and one stick of ram, Make sure the one stick of ram is in the correct slot for that configuration. Do not attach anything else. Try to boot. If no joy, try another stick. Make sure the case connectors are properly oriented to pin one. Look for the embossed triangle and do not depend on the cable labels.

 

[austin835]

Thanks, i will have him try that.. he is out of town atm.. when he gets home i will have him try and get back to you.

 

[Durvelle27]

the problem is the motherboard. If you read the motherboard CPU support list you'll see it only supports a 95W CPU and the FX 8120 is 125W. I believe the board isn't powering on so the board won't fry it is most likely a safety feature.


If you look you'll see only 95W CPUS are supported
http://www.asrock.com/mb/NVIDIA/N68C-GS FX/?cat=CPU


Return the board and actually get a decent board that actually supports your chip

 

[riversend]

And make sure you have anti-static in place. If you are in the US the dry air is brutal and it takes little movement to build up a charge.

 

[Durvelle27]

also another thing is to make sure the RAM is in the right slots as the board has both DDR2 & DDR3 slots

 

[austin835]

the CPU power is not the problem -_- i had it working b4 with the same exact board.. he tried taking out everything but the ram, did not work.. no power... what next?

 

[austin835]

hey Durvelle.. it clearly states, that the 8120 bulldozer CPU is supported.. on the list u gave me.. read again..

 

[VirtualLarry]

Next time, buy a real mobo, and a real power supply, instead of toy ones.

 

[Ketchup]

Have you checked to make sure the power switch is working properly?

 

[Steltek]

Next time, buy a real mobo, and a real power supply, instead of toy ones.

I'd worry more about the power supply than the motherboard - those oddball off brand power supply units are just future misery waiting for the worst possible opportunity to happen.

OP, do you have a speaker hooked up the motherboard so you can hear any POST beep codes? Also, what specific Ripjaws memory modules do you have? I'd try booting the system without any memory installed just to see if it is trying to POST at all.

 

[Steltek]

hey Durvelle.. it clearly states, that the 8120 bulldozer CPU is supported.. on the list u gave me.. read again..

It may say it is supported, but Durvelle is right -- the FX8120 is clearly a 125w processor, while ASRock's website in the specifications section clearly shows that motherboard only supports 95w processors. I'd say its inclusion in the CPU support list is likely an error, so you might want to speak to ASRock's tech support to ask about that.


EDIT: Further research indicates that there may be two different versions of the FX-8120 - a 95w version and a 125w version, though I can only find the 125w version for sale. Can you tell which one your friend might have? If he has the 125w version, it definitely won't work with that motherboard. In fact, if he has the 125w version and given what happened with the first motherboard, I'd say you could also need to test to see if the CPU might have died with the motherboard as well.

EDIT2:
95w versions: FD8120WMW8KGU is OEM/FD8120WMGUSBX is retail boxed processor
http://www.cpu-world.com/CPUs/Bulldozer/AMD-FX-Series%20FX-8120%20FD8120WMW8KGU.html

125w versions: FD8120FRW8KGU is OEM/FD8120FRGUBOX is air-cooled retail boxed processor/FD8120FRGUWOX is liquid-cooled retail boxed processor (had never seen this one myself....)
http://www.cpu-world.com/CPUs/Bulldozer/AMD-FX-Series FX-8120.html

 

[Durvelle27]

hey Durvelle.. it clearly states, that the 8120 bulldozer CPU is supported.. on the list u gave me.. read again..

OP, If you can read it also clearly states FX 8120 95W which your FX 8120 is not as there OEM and yours is 125W

 

[austin835]

well, be that as it may, it dont matter, the motherboard is the same exact one i had before, and that one ran THIS processor fine, also, it would power without a CPU, which it did not..

 

[Steltek]

OP, If you can read it also clearly states FX 8120 95W which your FX 8120 is not as there OEM and yours is 125W

well, be that as it may, it dont matter, the motherboard is the same exact one i had before, and that one ran THIS processor fine, also, it would power without a CPU, which it did not..

I edited my last post again (the one right above both of these). There are both OEM and retail versions of the 95w and 125w versions of the FX-8120 -- I've included references including model numbers of both. There is apparently also a boxed 125w version with liquid cooling -- I'd never seen that one before, so learn something new every day. . . .

austin835, you really need to know what processor your friend has. If it is the 125w version, while it will physically fit (i.e. both versions use the same socket) it really isn't supposed to work with his motherboard which is almost certainly the reason the first motherboard failed. It is also entirely possible his CPU was fried when the board failed as well, or that the new motherboard recognizes an incompatible processor has been installed so testing will need to take these possibilities into account.

 

[T_Yamamoto]

well, be that as it may, it dont matter, the motherboard is the same exact one i had before, and that one ran THIS processor fine, also, it would power without a CPU, which it did not..

Well it could have died because your CPU isn't supported....

 

[Durvelle27]

I edited my last post again (the one right above both of these). There are both boxed and retail versions of the 95w and 125w versions of the FX-8120 -- I've included references including model numbers of both. There is apparently also a boxed 125w version with liquid cooling -- I'd never seen that one before, so learn something new every day. . . .

austin835, you really need to know what processor your friend has. If it is the 125w version, while it will physically fit (i.e. both versions use the same socket) it really isn't supposed to work with his motherboard which is almost certainly the reason the first motherboard failed. It is also entirely possible his CPU was fried when the board failed as well, or that the new motherboard recognizes an incompatible processor has been installed so testing will need to take these possibilities into account.

Yes ik there is a boxed version of the FX 8120 95W but it hasn't been sold in the US since the middle of 2012 and it was only sold for like 2 months before it stopped selling and idk about liquid cooled. As the FX 8150 was the only one i knew of that was liquid cooled

 

[VirtualLarry]

Bottom line is, running a 125W CPU in a 95W-rated mobo, is a sure recipe for disaster. Burned-out mobos are almost certain in that case, eventually.

And the TDP rating for Bulldozer is kind of a farce. Look for IDontCare 's thread in the CPU forum about him testing his 8350. It sucks down a LOT of power.

 

[Durvelle27]

Bottom line is, running a 125W CPU in a 95W-rated mobo, is a sure recipe for disaster. Burned-out mobos are almost certain in that case, eventually.

And the TDP rating for Bulldozer is kind of a farce. Look for IDontCare 's thread in the CPU forum about him testing his 8350. It sucks down a LOT of power.

so true

My FX 4100 drawed about 100-105W sometimes more when loaded at stock so when i used it in a 760GM 95W board i got throttling issues and the board died

 

[mfenn]

Bottom line is, running a 125W CPU in a 95W-rated mobo, is a sure recipe for disaster. Burned-out mobos are almost certain in that case, eventually.

And the TDP rating for Bulldozer is kind of a farce. Look for IDontCare 's thread in the CPU forum about him testing his 8350. It sucks down a LOT of power.

Yep, plus that Apevia PSU sure isn't helping!

 

[austin835]

Alright.. everyone, thanks for the replies. And I'm gonna clarify some things.. the CPU is ok.. just clearing that.. cause we tested it elsewhere.. but either way.. this computer not even attempting to power up cannot be because of the processor. Or the PSU. As another PSU was tried and the thing should still spin the fans at the very least without the processor.. but nothing at all happens.. it's as if the computer is not plugged in when u press power (it is of course) but I have no idea....

 

[mfenn]

Did you double check that the case's power switch is working? try shorting the power switch pins on the mobo with a screwdriver.

 

[Ketchup]

Make sure that if you have a power switch on the back of the PSU it is switched on. You would not be the first person to make that mistake.

 

[austin835]

I havent tried checking the switch.. i will tell him to try, and as for the PSU off/on switch, i did tell him to try that.. i know that mistake.. LOL!!!