UDIMM vs DIMM question

Tashikie · Mar 17, 2014

Hey, I was looking to upgrade my RAM, and I was doing a lot of reading and such, and I eventually found Crucial's system scanner to give me more of a definite answer on what I can upgrade to. It told me that a 8GB Kit (4GBx2), 240-pin DIMM, DDR3 PC3-12800 was compatible, but I was looking to get it for a little cheaper, so I went to amazon. I copied it word for word and ended up with this search result: Crucial 8GB Kit (4GBx2) DDR3 1600 MT/s (PC3-12800) CL11 Unbuffered UDIMM 240-Pin Desktop Memory Modules. Both descriptions look pretty identical, minus that UDIMM part. Is it really the same thing? I read that UDIMMs are usually for workstations, and I have a N-Alvorix-RS880-uATX (Alvorix) motherboard. Any assistance would be much appreciated.

Ahmadjon · Mar 17, 2014

It's not good RAM it has higher CAS Latency than unbuffered RAM
You can get regular 2x4GB RAM with CL9 1600MHz (PC3-12800)

Someone Somewhere · Mar 17, 2014

I beleive UDIMM simply means Unregistered, which is standard for 99% of RAM (including what you already have).

However, I suggest getting something with a CAS latency of 9 or lower.

What's the board/CPU?

EDIT: Ninja'd, and I didn't read the post fully.

Ahmadjon · Mar 17, 2014

Someone Somewhere :

I think this motherboard http://h20566.www2.hp.com/portal/site/hpsc/template.PAGE/public/kb/docDisplay/?spf_p.tpst=kbDocDisplay&spf_p.prp_kbDocDisplay=wsrp-navigationalState%3DdocId%253Demr_na-c02560084-8%257CdocLocale%253D%257CcalledBy%253D&javax.portlet.begCacheTok=com.vignette.cachetoken&javax.portlet.endCacheTok=com.vignette.cachetoken

Tashikie · Mar 17, 2014

I'm guessing the "CL11" part is the latency you guys are talking about? Ok, so I'm looking for something a little lower. I have a N-Alvorix-RS880-uATX motherboard, and a AMD Athlon II X4 640 processor. Will something like this work? http://www.amazon.com/Kingston-Modules-1600MHz-Non-ECC-Desktop/dp/B0057Q4ADU/

Someone Somewhere · Mar 17, 2014

That link's not loading for me (EDIT: Referring to the HP one), but it's an AM3 board, with up to DDR3-1333 support. There's no point in getting DDR3-1600.

I'd get these: http://www.amazon.com/dp/B004DDI0IE/

Tashikie · Mar 17, 2014

Perfect, thank you!

Tashikie · Mar 17, 2014

I'm sorry, last question. I already have the stock 4 gigs of RAM installed, so I can add these 2 sticks in addition to those and there won't be any problems? I don't want to get my hopes up yet of having 12 gigs of RAM

Someone Somewhere · Mar 17, 2014

You can, but it might break dual channel support - won't be as fast.

It's generally better not to mix RAM.

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UDIMM vs DIMM question

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