Best 5500/5600 Dual CPU Config for X8 boards

Best CPU Selection for x8 Motherboard in 2018?


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aftereffectsmagic

New Member
May 1, 2018
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Hi there,

Just picked up a SC847 chassis with a X8DTU-F motherboard included (Revision 2.01) for $175. It also came with an L5520. I planned to get a x9DRi-LN4F but I got the motherboard as a bonus with the chassis and I figured since this was my first NAS build I would try the x8 motherboard first to see if I could get some use out of it for a low budget approach.

Primary purpose: ESXi with FreeNAS as a VM, so AES-NI is a must. I already have 28 x 4GB of DDR3 1333 RDIMMs- plan to populate all of the DIMM slots on this X8DTU-F motherboard and have a bit left over.

I've been looking at ARK for the Westmere and Nehalem processors and have been trying to figure out:

1) Do I get another L5520 ($3.24 for one) to complete my dual CPU setup?
or
2) Do I get dual L5640s ($15 each) and scrap the L5520?
or
3) Do I choose a different 5500 / 5600 option altogether? If so, I'd like to spend no more than $20ish each CPU (and that expense would have to be justified, as I would be putting money in an aging x8 system).

Planning to pick up a Dynatron G666 cooler to match the existing cooler already in the chassis. Most of the recs here seem to be older comparatively, so posting this for an updated 2018 look at this issue.

Thanks!
 

BlueFox

Legendary Member Spam Hunter Extraordinaire
Oct 26, 2015
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AES-NI was not included until Westmere-EP, so you'll want a 56xx CPU. The L5520 doesn't support it.
 
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aftereffectsmagic

New Member
May 1, 2018
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That's very helpful, thanks. I looked into ESXi 6.7 - the most recent release- and found this:

Upgrades and Installations Disallowed for Unsupported CPUs
Comparing the processors supported by vSphere 6.5, vSphere 6.7 no longer supports the following processors:
  • AMD Opteron 13xx Series
  • AMD Opteron 23xx Series
  • AMD Opteron 24xx Series
  • AMD Opteron 41xx Series
  • AMD Opteron 61xx Series
  • AMD Opteron 83xx Series
  • AMD Opteron 84xx Series
  • Intel Core i7-620LE Processor
  • Intel i3/i5 Clarkdale Series
  • Intel Xeon 31xx Series
  • Intel Xeon 33xx Series
  • Intel Xeon 34xx Clarkdale Series
  • Intel Xeon 34xx Lynnfield Series
  • Intel Xeon 35xx Series
  • Intel Xeon 36xx Series
  • Intel Xeon 52xx Series
  • Intel Xeon 54xx Series
  • Intel Xeon 55xx Series
  • Intel Xeon 56xx Series
  • Intel Xeon 65xx Series
  • Intel Xeon 74xx Series
  • Intel Xeon 75xx Series
During an installation or upgrade, the installer checks the compatibility of the host CPU with vSphere 6.7. If your host hardware is not compatible, a purple screen appears with an incompatibility information message, and the vSphere 6.7 installation process stops.

The following CPUs are supported in the vSphere 6.7 release, but they may not be supported in future vSphere releases. Please plan accordingly:
  • Intel Xeon E3-1200 (SNB-DT)
  • Intel Xeon E7-2800/4800/8800 (WSM-EX)
Based on this, I will have to go with an ESXi 6.5 build if I proceed with the X8 motherboard. Out of the possible 6 core 56xx options is L5640 the best bang for the buck in 2018, or should I be looking at a different CPU?