11-07-2019 05:46 PM
I recently bought a D20 (4155) CTO that has a single Xeon E5502. The hardware manuals lists various CPUs for the D20 series. I want to fill both sockets and have found plenty of them on eBay.
My main question is will this specific model work with 6 core CPUs or will I max out with quad cores.
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11-08-2019 07:13 AM
You could get to dual 6-core Xeons on D20, but you'd have to utilize Westmere-EP class CPUs to do it.
Here's a quick list of the 6-core parts that are qualified on the platform:
E 5640, E-5645, E-5649
X-5650, X-5660, X-5670, X-5675, X-5680, X-5690.
Note that if you choose to go this route, you'll want to make sure you update your system BIOS before installing the new CPUs. This will ensure the proper CPU microcode patches are there to support the Westmere CPU as you currently have a Nehalem based CPU. You'll also want to make sure the CPUs you're purchasing are the latest stepping level, and that both parts are the same stepping level. The latest qualified stepping for the parts above is B-1.
You also might need to upgrade your heatsink(s) depending on which CPU you pick. There are two supported heatsinks on D20:
FRU 41R5578 - supports CPUs with TDP up to 95W
FRU 41R5580 - supports CPUs with TDP up to 130W
It's probably easiest if you simply go with dual 130W heatsinks to make sure it would handle any supported CPU combination you would throw at it.
Also note that dual CPU configs in D20 must use the same exact CPU for both sockets. You cannot mix CPUs between the two sockets.
11-08-2019 12:06 PM
No worries .
The 20 series platforms are nostalgic for me for many reasons. And even with some of their drawbacks, they were solid as a rock too, so I'm glad to see people still using them out in the field.