Help me pick my ram

First, unless you're Rendering there's no need for 16GB much less 32GB of RAM. Currently, the few 8GB/stick density non-ECC RAM is cost prohibitive of 'most' folks and will cost you ~$1,000~$1,200+ USD.

Also the RDIMM {Registered ECC} is less expensive but requires a Xeon or AMD processors that support 8GB/DIMM.

The GA-Z68XP-UD5 and Intel Sandy Bridge supports non-ECC, so IF the Goal is 16GB then the following (2) kits:

$118 CMZ16GX3M4A1600C9 CORSAIR Vengeance 16GB (4 x 4GB) DDR3 1600 - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

$150 F3-14900CL9Q-16GBXL G.SKILL Ripjaws X Series 16GB (4 x 4GB) DDR3 1866 - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Also windows 7 home premium 64bit only supports up to 16GB ram, you will need the 64 bit version of either pro or ultimate to use the 32GB.

Yep see -> http://msdn.microsoft.com/en-us/library/windows/desktop...(v=vs.85).aspx

timings on SB platform are not as important as frequency is specially when your CPU is OC'd
http://www.xbitlabs.com/articles/memory/display/sandy-b...
,if you looking for low voltage 16gb set this set is pretty good
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
i have 8gb set and it will run (1.575v) CL10-11-10-27-1T(11-11-11-28-2T if you want all 16)
there is not much out there right now ,if you want better look for 2133 CL9-10/11-9
http://www.memoryc.com/computermemory/ddr3/8gbgskillddr...
good luck
EDIT; the set posted above by jaquith ..i'm almost positive it's the same set as 2133 i link ,they just selling under 1866
i know someone that runs it 2133 (same voltage/timings so you can save 50$)

Those 'Synthetic' tests don't do a thing for 'real life' situations or tasks.

The 'problem' is HIGH DENSITY + HIGH FREQUENCY, currently, is the Sandy Bridge has a much MUCH higher risk of throwing errors during prolonged Rendering or similar Stressed situations. Therefore, I very rarely recommend >DDR3-1600 in those situations. The only 'real life' benefits from DDR3-1866 or faster is in Multi-Tasking situations.

To simplify, if I were running a 4~12 hour Render there's NO WAY I would be doing it on 16GB~32GB of DDR3-1866/2133. Also, to my knowledge I've only seen DDR3-1333 in 8GB/stick density.

Rendering and prior page for Cinebench R10 - http://www.bit-tech.net/hardware/memory/2011/01/11/the-...

As far as Gaming, as stated >8GB offers little benefits though there are a tiny amount of Games that do benefit from 12GB (3x4GB) or 16GB (4x4GB).

GB and Gaming Article -> http://www.tomshardware.com/reviews/ram-memory-upgrade,...

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In contrast, on my X58 I do have 16GB of DDR3-2000, but on the X58 you can increase the BCLK -- on the LGA 1155 you cannot increase the BCLK >107MHz without serious risk to data integrity. So the added Frequency is like a 'wall' to the LGA 1155 at least to Gaming and Rendering. The LGA 2011 and SB-E are going back to a BCLK that can be modified and isn't tied into the PCIe like the LGA 1155. Well see soon enough on SB-E memory testing.

I don't know where you get " Sandy Bridge has a much MUCH higher risk of throwing errors during prolonged Rendering or similar Stressed situations" ?.(don't show me benches/reviews with Hyper's in them).
as for little benefit..sure if you running stock SB (look at the reviews there is stock SB or AMD based platform ,once you open up SB you will noticed your system to be a bit snappier it's all about bandwidth , i was running 1600 before and will not go back -2133 feels just .. well faster ,i know few ppl running 16 gb @1600 and they would love to have it @2133 it's hard to explain/measure ,you just have to try both ,there are other benefits of getting higher density/quality IC RAM ..you can down-clock to 1866 or even 1600 with tide timings and lover you voltage and or use the RAM in you next platform (it's called future proof) lets face it every new platform needs more speed otherwise we will still be using 800 CL5

I don't know where you 'get' or 'assume' higher RAM Frequencies offer the same stability and low error rate as say DDR-1333 or DDR3-1600 - they do not!

edit: Run Prime95 + Blend tests overnight and you'll be rethinking using Faster + High Density RAM. I've said my feelings and I know what I've built and seen in both this forum and plenty of bench tests. If the OP wants to max-out the DIMMs then just remember what I said and the reasons I've stated the concerns.

Interesting statements, interesting Kit considering you posted DDR3-1600 'F3-12800CL7T-6GBPI' {G.SKILL PI Series 6GB (3 x 2GB)} which is a tri-channel kit, and interesting coolhandluke41 / ortoklaz considering the coolhandluke41 posted 8GB G.Skill X 2133.

Bizarre?!

the PI series 1600 is what i start the build with (last time i visit this forum) and yest i do have more that one set of RAM so i know what i'm talking about ,this is what i run for benching
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://imageshack.us/f/844/best32m.png/

this is my 24/7 kit
http://www.newegg.com/Product/Product.aspx?Item=N82E168...


as for benching or stability of my RAM ..don't get me start it  

BFD - I'm hard to impress. I hate to pop your little bubble but run Prime95 + Blend for at least 12 hours with no memory errors then I'd listen. I've seen the ultra-low CAS and high-frequency fail way too many times to listen to your 'feelings' on the matter.

BTW -the F3-17600CL7D-4GBPIS are DDR3-2200 7-10-10-28-2N, but you've listed 10-11-10-30-2N SO It's a SAFE BET that your RAM FAILED.   Worst with those s-l-o-w CAS timings you might as well be running them DDR3-1600 CAS 8 -- you'd notice NO CHANGE:


Gaming, 50/50 if updating to SB-E but will be adding 3-WAY GTX 600 series. The SB vs SB-E vs 980X with 8xAA = no damn difference. All Koolance, braided, blah...blah.


My Everyday PCs - 11 of them, and keeping till it makes any sense to file-13/eBay.

arguing with you is like arguing with 12 years old ,no one is trying to impress just presenting some facts and not some pulled out of your S opinion ,do yourself a favor ..get one single SB rig before giving your "opinion" on it ,good bye


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I wish you actually KNEW what you were talking about, and you understood HOW RAM actually worked! What did you think, CAS was some meaningless number and had no influence on RAM's performance.

The WIKI crap you posted shows 1/2 the story of RAM, the 'Peak transfer Rate' is how fast the data is transferred between CAS 'pauses' or pulses.

To dummy it down for the 6 year olds:

You have to look at RAM as a whole Frequency {bandwidth/Transfer Rate} and CAS {pauses} with transmission. Think of is this way a car can instantly go 100 MPH but the Stops are longer (9 sec) vs 75 MPH but the stops are shorter (7 sec) both with a 100 stops in a mile. Further, the CPU however says you can run only 85 MPH.

How long does the car take to drive a mile?

MPH analogous to 'Peak transfer Rate'
Stops analogous to 'CAS'