Which memory is best

greg209 · Sep 17, 2013

http://www.newegg.com/Product/Product.aspx?nm_mc=AFC-TechBargains&cm_mmc=AFC-TechBargains-_-NA-_-NA-_-NA&Item=N82E16820231519

http://www.newegg.com/Product/Product.aspx?nm_mc=AFC-TechBargains&cm_mmc=AFC-TechBargains-_-NA-_-NA-_-NA&Item=N82E16820231455

Faster RAM but higher latency; or slower RAM with lower latency?

P1nnacle · Sep 17, 2013

If you use the ram at its full speed, the 2133 will perform better. CAS latency was more of an issue in earlier versions of DRAM, but is less obvious now.

greg209 · Sep 17, 2013

Ok, so I really shouldn't concern myself with latency and whatnot...faster is always better (when stressing the memory)?

P1nnacle :

P1nnacle · Sep 17, 2013

greg209 :

Yeah, while I don't want to say that CAS latency isn't important now, it's not as important s it once was. At top speed, the 2133 will perform better because it has a higher top speed.

geofelt · Sep 17, 2013

The faster ram gets there by overclocking, running at 1.6v instead of the normal 1.5v.
Go to the G.skil web site and check their ram configurator for compatibility with your motherboard.
Actually, it makes little difference in real app performance or fps. Think 1%
http://www.anandtech.com/show/4503/sandy-bridge-memory-scaling-choosing-the-best-ddr3

greg209 · Sep 17, 2013

wow i just learned something...didn't know that RAM might have a compatibility issue with your MB...just thought all was compatible..thanks

geofelt :

P1nnacle · Sep 17, 2013

geofelt :

The question was is cas latency or frequency more important for a faster overall ram experience, the answer being frequency. And since the price difference is 3 dollars, I'd go with the higher frequency RAM, even if it doesn't give you a huge difference in RW performance.

Tradesman1 · Sep 17, 2013

It's actually a combo of the two if you look at reg, basic DRAM say at these freqs

1600/9 1866/10 2133/11 2400/12 with each one going you you gain a bit of a performance edge, however if you look to higher with a better CL (CAS) at times, the lower frew will outperform the higher freq, i.e. with the basic sets above say you go for the fastest the 2400/12 and find a set of 1866/8 or 9 they will actually outperform the 2400/12 as 1866/8 equates roughly to 2400/10 (the CAS is how long it takes to perform an action, in effect)

P1nnacle · Sep 17, 2013

Tradesman1 :

The chances of a normal person noticing the difference with DDR3 is next to none. You're correct, but its such a minuscule difference you can pretty much write it off.

Tradesman1 · Sep 17, 2013

You can write it off if YOU wish, when I can sit clients at two identical systems (except for DRAM) in a blind situation (they don't know of any differences) and have them work the rigs they way they normally do at work and then over 85% of the time the pick the rig with faster DRAM as being a better rig - to me - that's real world

particularly when they are people that work the rigs and are used to high performance - see it here in the forums also, people breaking away from thse same old, same old suggestions to just get 1600 and buy higher end DRAM and they come back talking about how fast they are now

P1nnacle · Sep 17, 2013

Tradesman1 :

You lost me, maybe we're in agreement and I just missed something. Are you saying he should go with the higher speed ram (i.e the 2133MHz RAM) and not the lower cas latency?

Tradesman1 · Sep 17, 2013

I'm saying if you go with higher freq performance DRAM it will provide a noticeable difference, however higher freq alone doesn't do it, it's a combo of the CL and the freq....it can be miniscule if you get say 1600/9 and 2133/11 which just follows the step progression of 1600/9 1866/10 2133/11 but toss in a GOOD combo of 2133/9 vs 1600/9 and you'll see much more of a difference, especially if multi-tasking, imaging, video work, CAD, GIS, VMs....anything memory centric

P1nnacle · Sep 21, 2013

Tradesman1 :

Ok, we're in agreement and I just misunderstood you. My apologies for any contention.

Tradesman1 · Sep 21, 2013

No problem, most folks don't understand DRAM, so I try and clarify where I can for them

I've even pointed out things to the support folks at Corsair and Mushken on a couple occasions when they gave wrong info to clients

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