UDIMM Marked 1Rx8 Vs 2Rx8

[welner]

Dell 9010, i7-3770, RAM: 2 x 2gb, Win 7 Pro 64-bit

What does the "1Rx8 PC3 Vs 2Rx8 PC3" listed on the 2 RAM kits label-specs stand for ...

1) 2 Hynix 4GB ------ 1Rx8 PC3 ------12800U -- 11 -- 12 -- A1 DDR3 1600MHZ ECC HMT451U6AFR8C-PB N0 AA 1401

2) 2 Hynix 4GB ------ 2Rx8 PC3 -------12800E -- 11 -- 12 -- E3 DDR3 1600MHZ ECC HMT351U7CFR8C-PB T0 AD 1302

Are both of these RAM kits DIMMs rated CL11 or CL12 ...

I cannot use the 2cnd listed RAM-kit because it is ECC-RAM, but should I be buying U-RAM that has 1Rx8 or 2Rx8 listed on it's label-specs ...

 

[junkeymonkey]

http://serverfault.com/questions/273931/difference-between-2rx4-vs-2rx8-ram

this is a bit better

http://forum.crucial.com/t5/Crucial-memory-for-PC-systems/What-is-a-memory-Rank/ta-p/126346

tell ya , best to use a deal like here and get memory ''THEY' claim and guarantee to work in that dell ??

http://www.crucial.com/usa/en/compatible-upgrade-for/Dell/optiplex-9010-(small-form-factor)

or use there part numbers to check stores you want to buy from to get it ..


you did not say what dell 9010 you got just be sure you check the model like this all in one maybe different memory used ??


http://www.crucial.com/usa/en/compatible-upgrade-for/Dell/optiplex-9010-all-in-one