PN for the primary heatsink in a T7500?

The ironic part is that I said that U016F was the part a year ago and then many proceeded to say No that's not it without ever having tried it.

:emotion-4:

The ironic part is that I said that U016F was the part a year ago and then many proceeded to say No that's not it without ever having tried it.

I think you are referring to wrong thread ;)

Nobody ever argued with you in THIS thread - that this part number/heatsink isn't right :)

yes,

that's what i am doing tonight.

i will try to swap them first to see if i get an error on the other memory DIMMs

and then just put them in single config.

it is just really weird a CPU would cause one DIMM slot to not function.

thanks for your reply!

I've upgraded T7500 from 2x X5570 to 2x X5650 + 12x8GB - no problem at all.

X5650 have memory controller built-in ... so it looks like something is wrong with one of the new CPUs ... can you try and swap them ?

And/or test them in single CPU configuration ??

Cheers

Like I said - memory controller is integrated inside the CPU.

You can also try to clean contacts. And maybe take a closer look at the CPU socket.

And good luck :)

Intel® Xeon® Processor E5620 (12M Cache, 2.40 GHz, 5.86 GT/s Intel® QPI) FC-LGA10: SLBV4 : BX80614E5620 : B1

Intel® Xeon® Processor X5650 (12M Cache, 2.66 GHz, 6.40 GT/s Intel® QPI) FC-LGA10, SLBV3 : AT80614004320AD : B1

Stepping and CPUID must match exactly.  They have identical CPUID

Ram speed changes for the Faster processor due to faster FSB.

X5650       LGA1366
CPUID    206C2h
Core stepping    B1
Processor core    Westmere-EP

E5620       LGA1366
CPUID    206C2h
Core stepping    B1
Processor core    Westmere-EP

Turbo Boost mode is 266 MHz for 6, 5, 4 or 3 cores, and 400 MHz for 1 or 2 cores.

Turbo Boost mode is 133 MHz for 4 or 3 cores, and 266 MHz for 1 or 2 cores.

 Which means DDR3-1066 vs DDR3-1333 memory.

SpeedStep,

not sure what your point is, i already know all that

and i do have TWO identical E5620's and TWO identical X5650s.

the problem is when both X5650s are installed 2nd DIMM on a riser board (daughter board) is reporting

error. when both E5620s are installed there is no DIMM error.

@Robinet,

I opened the machine, pull out the riser where the CPU was mounted and ran it in one cpu config
and everything seemed fine. so then I swapped the cpus and ran it in one cpu config and it ran fine.

at this point i am confused since the CPU i thought had an issue was working fine in 1st CPU socket
so i figured you must be right, it must have been a contact or piece of dust or something like that.

I installed the 1st cpu in the riser slot, which was giving me issues but this time it didn't report any problems and errors.   :emotion-21:

thanks for your input and thoughts

I installed the 1st cpu in the riser slot, which was giving me issues but this time it didn't report any problems and errors.   :emotion-21:

I often had the same problem with DELL 690/T7400 and memory risers - sometimes I had to re-insert them few times before they got good contact and started working.

thanks for your input and thoughts

You are welcome :)

How can I tell if my T5500 has the O0D883F or 0CRH6C mobo?

You should see a sticker near the CMOS battery:

(on the right, just below the memory slots)

Hello Bev. 

I have an older Dell Precision T5500 going to update the CPU with two x5680's they have 130Watt TDP,

was told to get a U402F heat sink's for the better heat dissipation.

Please confirm that I can use them for the first and second CPU  on my Dell. I have 2nd CPU riser,

current CPU's are two e5606's

Thank you in advance for your help. Paul.