Mac pro disables 1 CPU and half RAM slot

lebowskiguy · Nov 1, 2012, 06:46 PM

Hello people, I have an 8 core mac pro 2009 with 16 gb ram, i have not used it for a while and today i've turned it on, mac recognizes only 1 cpu and 8 gb of ram, ive tried reistalling OS, Reset NVRAM. actually CPU and RAM which is unseen by mac are properly working, i took the parts and swaped, i can tell which works cause one cooler is cold and second goin hot so nothing helps please help

MacVidCards · Nov 1, 2012, 07:54 PM

reset NVRAM to start, then start looking for burned stuff

lebowskiguy · Nov 1, 2012, 08:25 PM

Quote:

Originally Posted by MacVidCards

reset NVRAM to start, then start looking for burned stuff

Thank u for reply

ive reseted NVRAM , startup option comand p r . do u mean that?
but still the same( can motherboard might just burned some connections for the bridge which supplies power for one half of a socket and PINs?

masfet · Nov 1, 2012, 08:38 PM

Normally, a Mac Pro will not even boot with a failed CPU. Thus, maybe you have a single CPU, 8Gb installed?

lebowskiguy · Nov 1, 2012, 08:45 PM

Quote:

Originally Posted by masfet

Normally, a Mac Pro will not even boot with a failed CPU. Thus, maybe you have a single CPU, 8Gb installed?

No no its a 2 xeons, ive dispanded and swaped cpus to the sockets , i also swaped rams everything seems to work fine

lebowskiguy · Nov 3, 2012, 11:21 AM

Ive sorted it out , CPU released some kind of a acid... thats what she said

so i cleaned my CPU with Ethanol and it works !!!!

beyond · Nov 3, 2012, 11:49 AM

Quote:

Originally Posted by lebowskiguy

No no its a 2 xeons, ive dispanded and swaped cpus to the sockets , i also swaped rams everything seems to work fine

Dispanded and swaped???

DanielCoffey · Nov 3, 2012, 12:31 PM

I hope you replaced any thermal compound if you removed it from the CPUs and heatsinks...

lebowskiguy · Nov 3, 2012, 04:27 PM

Quote:

Originally Posted by DanielCoffey

I hope you replaced any thermal compound if you removed it from the CPUs and heatsinks...

of Course !!!! thank u

Nov 1, 2012, 06:46 PM	#1
lebowskiguy macrumors newbie Join Date: Nov 2012	Mac pro disables 1 CPU and half RAM slot Hello people, I have an 8 core mac pro 2009 with 16 gb ram, i have not used it for a while and today i've turned it on, mac recognizes only 1 cpu and 8 gb of ram, ive tried reistalling OS, Reset NVRAM. actually CPU and RAM which is unseen by mac are properly working, i took the parts and swaped, i can tell which works cause one cooler is cold and second goin hot so nothing helps please help
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Nov 3, 2012, 12:31 PM	#8
DanielCoffey macrumors 6502a Join Date: Nov 2010 Location: Edinburgh, UK	I hope you replaced any thermal compound if you removed it from the CPUs and heatsinks... __________________ MacPro 5,1: 6 x 3.33 GHz / 12 GB RAM / AMD 7950 3Gb / 120Gb SSD, 240Gb SSD, 500Gb HDD / ACD 27" / APC SMT1000I iPhone 5: 32Gb White / O2 3G / TwigCase Bamboo / BodyGuardz Pure
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Nov 1, 2012, 07:54 PM	#2
MacVidCards macrumors 65816 Join Date: Jul 2011 Location: Hollywood, CA	reset NVRAM to start, then start looking for burned stuff
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Nov 1, 2012, 08:38 PM	#4
masfet macrumors newbie Join Date: Feb 2009	Normally, a Mac Pro will not even boot with a failed CPU. Thus, maybe you have a single CPU, 8Gb installed?
	0

Nov 3, 2012, 11:21 AM	#6
lebowskiguy Thread Starter macrumors newbie Join Date: Nov 2012	Ive sorted it out , CPU released some kind of a acid... thats what she said so i cleaned my CPU with Ethanol and it works !!!!
	0