Memory upgrade question

Hello Tomshardware :)

I've noticed the prices on RAM are pretty low and I thought I'd buy some. I just need a little help on choosing.

I have this setup:
MB: ASUS P6X58D-E X58 S-1366 ATX
CPU: INTEL CORE I7 950 3.06GHZ 8MB S-1366

Now I never really got my ram to run stable at 2000 MHZ so I set them to around 1600 or 1866.

Anyway. I can't find this ram anymore so I thought I'd just buy something else and perhaps just get 1600 MHZ ram instead.

According to ASUS's website the motherboard I have supports 24GB ram and according to the QVL list from there isn't any 24GB solution but there is a 12GB solution with 3 modules in a pack.

Would adding 2 x 12 GB packs be alright? So I could get 2 of these:
KHX1600C9D3K3/12GX. Would there be room enough with the coolers to have them side by side?

My other choice is to go for a complete set like this:
KHX1600C9D3T1BK6/24GX even though it's not on the QVL list.

I also found some Cosair: CMP24GX3M6A1333C9. They are a bit more expensive and only run 1333MHZ. Would it make any difference compared to the Kingston I found? Also, this kit is not on the QVL as well.

What are your recommendations?

Thanks! :D
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More about memory upgrade question
  1. First, what do you use your system for? 6 gb may be plenty for your applications. For any ram you choose, just get some name brand like the ones you mentioned with a lifetime warranty and look for lower numbers for the timings, such as 9-9-9-24 for cl9 spec ram. These are the brands I've used: corsair, crucial, kingston, pny, patriot, samsung, and gskill (my current brand). I've never had any serious issues with these brands.
  2. My PC is my gaming rig. I'm starting to use VirtualBox more and I need more memory. Also it does help having more ram so I thought I might as well buy some since it's pretty cheap.

    I can't find that many pieces of ram like these so there isn't really any other choice than the ones I found (can't find any with lower timings).
  3. Most CL9 ram will work on your board. One unlucky guy said Intel voided his cpu warranty for using 1333 ram with his 1366 cpu; I think it was a 950. The default setting is only 1066 fsb for most boards, so you can get the lower priced ram. Intel claimed his memory controller only runs correctly at 1066; go figure. I didn't realize they were so picky about ram speeds.
  4. Usually when you try and get more speed with your ram it affects the CPU - at least from what I can tell when I tried out different settings to make my current ram go 2000 MHZ. So I'm already "overclocking" I guess.

    Default bios settings sets my ram speeds to 1066 MHZ.

    I guess I need to find some performance charts for 1066 vs. 1333 ram :) tnx!
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