Which is Faster? CAS 10 DDR3 2400Mhz or CAS 9 DDR3 2133Mhz? - Page 3 - Overclock.net - An Overclocking Community

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Which is Faster? CAS 10 DDR3 2400Mhz or CAS 9 DDR3 2133Mhz?

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post #21 of 31 (permalink) Old 03-20-2012, 05:37 PM - Thread Starter
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I've got the ram to 2176 on stock timings
AID64 Cache & Memory Benchmark gets 21569 READ
Passmark gave memory score of 8945.0
Sandra got 51.11 GB/s Aggregate Memory Performance338

Soon I will overclock to 2400Mhz with the timings of the 2400Mhz kit and then benchmark

also showed 20.9ns latency

Faster than the Test bench used here which was quad channel 2133 with 3960X CPU @ 4.9ghz:
http://www.tweaktown.com/articles/4416/intel_x79_quad_channel_and_z68_dual_channel_memory_performance_analysis/index5.html

I'm guessing because the Sandra I used is a newer version better suited for the LGA2011 platform
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post #22 of 31 (permalink) Old 03-20-2012, 06:36 PM
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post #23 of 31 (permalink) Old 03-21-2012, 01:12 AM
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Great to see this much memory still being able to run those speeds, thanks! thumb.gif
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post #24 of 31 (permalink) Old 08-02-2014, 09:00 AM
 
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Quote:
Originally Posted by MrTOOSHORT View Post

I have the Corsair Dominator GT 2133MHz cas 9 1.5v ram. I run them at 2400MHz cas 10 1.65v and it's faster than the stock speed.

Most likely you will be able to OC the 2133MHz kit the same way if your cpu's IMC can handle the speed.

I am running Corsair Vengeance 32GB 2133mhz PC3-17000 RAM running at its XMP profile 10-11-11-31, can you give me any advice on where to start with tuning these sticks.
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post #25 of 31 (permalink) Old 08-02-2014, 09:53 AM
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For anything beyond the broad "guidelines" of memory overclocking, we'll need to know the "Revision" number of your sticks, whichwwilliidentify the IC's in use.

Looking at the timings, I'm fairly certain they'reSamsung, but I have been wrong before (once, in 1997...not my fondest memory... tongue.gif).

If so, I have found...
- Voltage is your friend, I would, and have, run as much as 1.75v daily on Samsung IC's
- To reach peak frequency, generally the timings "formula" for these is tRP = tRCD = tCAS + 2 (ie "9-11-11")
- I highly recommend not exceeding the point at which you must sacrifice command rate, from 1 to 2T, in order to clock higher; I generally consider that point minus one mHz to be the optimal speed for 99pct of usage scenarios
- Depending on the exact IC used, you may find that you can run timings like "9-10-12" better

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post #26 of 31 (permalink) Old 08-02-2014, 10:15 AM
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The 2400C10 give better results as 2133 C9 with my testing smile.gif

2133 C9 /11 /12


2400 C10/12/12
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post #27 of 31 (permalink) Old 08-07-2014, 02:54 PM
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Quote:
Originally Posted by nottinmatterz View Post

2400mhz:
Newegg.com - G.SKILL Ripjaws Z Series 32GB (4 x 8GB) 240-Pin DDR3 SDRAM DDR3 2400 (PC3 19200) Desktop Memory Model F3-19200CL10Q-32GBZHD

two similar 2133mhz:
Newegg.com - G.SKILL Ripjaws X Series 32GB (4 x 8GB) 240-Pin DDR3 SDRAM DDR3 2133 (PC3 17000) Desktop Memory Model F3-2133C9Q-32GZH
Newegg.com - G.SKILL Ripjaws X Series 32GB (4 x 8GB) 240-Pin DDR3 SDRAM DDR3 2133 (PC3 17000) Desktop Memory Model F3-2133C9Q-32GXH

Does the 1.65v in the faster ram make a difference?
Hope to use in a ASUS P9X79 DELUXE that should handle 2400mhz ram (approved for top kit)
This is a noob question like asking is higher horsepower engine faster
Higher ram speed is always faster if you have the 2133 cl9 oc compared to 2400 cl10 oc the max oc on the 2400 will be higher on the other hand you could probally do cl8 with the 2400 ram the cl is only -+1 diffrenece on stock the 2133 ram would be faster if it was a cl 7 or lower but not faster at cl 9

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post #28 of 31 (permalink) Old 08-08-2014, 02:49 AM
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Not really, because as a semi-pro racer, I can tell you that more horsepower doesn't inherently equate to more speed....

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post #29 of 31 (permalink) Old 08-08-2014, 09:06 AM
 
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Read this:

https://www.overclock.net/t/1487162/an-independent-study-does-the-speed-of-ram-directly-affect-fps-during-high-cpu-overhead-scenarios

Those are FACTS, not synthetics or personal preferences. DON'T get 1600 CL8 instead of 2400 CL10.

Get 2666 or 2800 even at CL11, that is if your CPU/MB can do that. The price difference should be marginal.
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post #30 of 31 (permalink) Old 08-08-2014, 05:11 PM
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especially the latest CPUs and going forward from now, high frequency will make a huge difference since CPU processing power and bandwidth will continue to be greater and greater. DRAM speed needs to keep up, we are not going back in time where DRAM bottlenecks CPU. This is why DDR4 starts at DDR4-2133, it is not a gimmick. HIgh DRAM Frequency has a real purpose. So no more crap about no real world advantage BS. Of course somebody using their computer for gaming, web browsing, etc. may not notice a difference, but this is not to say the computer is not much faster with the high speed RAM. rolleyes.gif

Don't blame the computer because you can't put it to full use. We are in a stage where computer technology is much greater and better than we can use it for. If everyone cared about web browsing and gaming only we would just use DDR2 and Core 2 Duo forever

Cheers

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