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2400 vs 2666? - Page 2

post #11 of 18
Quote:
Originally Posted by Cyro999 View Post

I just linked a newegg page with like three 2400 kits at $68/8gb ($136/16gb)

Well, speed is not the only consideration.... when I was doing the comparison it was apples and apples .... 2400 w/ lowest CAS timings versus other speeds with their best CAS timings

1. Looks like you didn't consider CAS .... with actual speed being 1000 x CAS / Speed

1000 x 9 / 2133 = 4.22 ns

1000 x 11 / 2400 = 4.58 ns

1000 x 10 / 2400 = 4.17 ns

Outta the 3 above, best is the 2400 CAS 10 followed by 2133 CAS 9 ......the 2133 is therefore the better overall choice so why go 2400 if ya going to go w/ CAS 11

So what's left .....when ya weed out the CAS 11's ?

The Mushkins w/ 10-12-12-28 timings that I quoted for $180 ... $10 more if ya want the big heat sinks

Two slightly slower 10-12-12-31 models one $5 cheaper from GSkill and one $30 cheaper from Team

I have been watching Team last year or so but not quite ready to take the plunge. They seem to have taken the same approach as GSkill when they started out, hitting the market with very low prices in their first years. One of these days I gonna give them a try but I'm still a bit gunshy. So it comes down to the Mushkies for $180 or the GSkills for $175 .... basically no significant difference

However, I have had issues with GSkill over the years .... of all the brands I have used I have had a return rate much higher than Mushkin, Corsair and Crucial but the biggest problem I have is in getting them to "play well w/ others". When doing upgrades, either I have just had bad luck but adding Mushkin, Crucials or Corsairs has never once failed me when all were same module, same # chips, same speed and timings ..... but adding GSkills .... even to other Gskills failed in the 3 outta 3 times I tried. And GSkill basically told me to go scratch my arse, tough luck

2. The other issue most people don't have with RAM, but OCNers tending to be the exception, is aesthetics.... and none of those two 10-12-12-31 do it for me....I find the styling / graphics a bit to aggressive.
Edited by JackNaylorPE - 11/9/13 at 8:24am
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post #12 of 18
Cas latency is not the only performance factor. My RAM @2400mhz c10 outperforms my friends @2666c10 for example
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post #13 of 18
Well of course how the MC in the CPU handles the memory is an issue.... but with the RAM itself, the 2666 Hz should be faster than 2400 at the same CAS..... but, that's why I pointed to the anadtech article shows. In most instances in these tests

http://www.anandtech.com/show/7364/memory-scaling-on-haswell/3

the 2666 does better but in Xilisoft, 2400 beats / or ties everything, even 3000.... In Dirt 3, 2400 outdoes 2666 both in single GPU and in CF

http://www.anandtech.com/show/7364/memory-scaling-on-haswell/7

But also, some of these are so small it could be written off to testing anomalies
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post #14 of 18
Quote:
Originally Posted by Murlocke View Post

The difference after 1600 is very very minimal. I would consider 16GB of slower RAM but that's just me, more future proof and I definitely have utilized over 8GB of RAM on my setup many times (Minecraft + Server with a 128x texture pack and lots of mods uses 13GB for me tongue.gif). There are plenty of 2x8GB kits out there.

I have to disagree with this, there IS a difference in FPS with higher bandwidths... See BF4, FC3, and really any modern/future title would take advantage. However, I must say, if you are going to purchase memory over 1600Mhz, go 2400Mhz ... Just enough to provide a difference and not break the bank.
 
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post #15 of 18
Quote:
but with the RAM itself, the 2666 Hz should be faster than 2400 at the same CAS..

With everything else the same (same RAM chips, single sided vs single sided, same primary, secondary, tertiary timings etc) then yea it should, but that's almost never the case. If you want super fast RAM you can pay $190+ for 16gb of the stuff, i was just saying you can get decent sticks (that'll do 3000c13 on 1.8v or decent timings at 2666) for ~$135/16gb
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post #16 of 18
Quote:
Originally Posted by Cyro999 View Post

With everything else the same (same RAM chips, single sided vs single sided, same primary, secondary, tertiary timings etc) then yea it should, but that's almost never the case. If you want super fast RAM you can pay $190+ for 16gb of the stuff, i was just saying you can get decent sticks (that'll do 3000c13 on 1.8v or decent timings at 2666) for ~$135/16gb

That's to be expected when ya have such variability in the performance of the IMC .... all things being equal, means all things not just things internal to the RAM..... all things being equal a 420 HP motor will make the car faster than one with 380 HP .... and while everything in the engines may be equal, putting the 420 in a 4000 pound vehicle and the 380 in a 2000 pound vehicle does not make 'all other things equal".....and yes, you can overclock RAM but 1) it's a crapshoot, and not guaranteed and 2) it will affect your CPU overclocks if you stress the IMC too much with higher voltages.
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post #17 of 18
^Yea but what i'm saying is, by RAM standards and surface descriptions, there are some 420hp engines that are worse than 380hp ones
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post #18 of 18
Well "being worse" certainly wouldn't meet the "all things being equal" requirement...
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