Matching for compatibility with particular models is only strictly necessary when running servers with huge amounts of memory. The interface for DRAM is the same across the board and when standard values are used compatibility issues are almost non-existent. The kit that you linked will of course work just fine. Alternatively, you can get a DDR3-1600 RDIMM set with ECC for a few dollars more. You can easily get a DDR3-1600H UDIMM set from Kingston which will work wonderfully. Your existing kit is DDR3-1600K but most DDR3-1600 modules are DDR3-1600H or better. If you're planning on replacing the existing memory modules entirely (which is highly advised) then there's no need to match the existing memory module's timing profiles exactly.
So my question is do I need to match the CL to what I have ? How close do I have to get? I do have the option of using eec or non-ecc as well which allows for more choices in the search but I think I'd be better off with ECC. I found for example a Corsair stick that had a CL of 11-11-11-30 and of course others. This last item is what I am unsure about. The HP specs are PC3-12800E 1600MHz DDR3 Unbuffered ECC 1.5v. So I have been trying to find any other alternatives but am running into the problem of knowing what specs have to be followed and what others you can cheat on. Axiom apears to be a OEM supplier and they sell for $78 while the rebranded sticks are $160. For example Kingston makes : KTH-P元16EK4/16G for the Z220 which sells for about $70 verses $150+ for the HP stick. So I have been trying to find compatable ram that will not break the bank. HP of course sell ram at a sligthly higher price oh say about 2.5x what everyone else wants. I just upgraded my i3 to a Xeon e3-1240v2 and a AMD W5000 video card which have really sped things up. Right now I have the oem 4gb (2x 2gb) and I want to upgrade to 16gb (4x 4gb).
I have been trying to find ram for my HP Z220 workstation.
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