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Tell me the best setup for this memory

post #1 of 7
Thread Starter 
Removed.
Edited by SamsungSucks - 3/3/12 at 10:27am
post #2 of 7
Quote:
Originally Posted by SamsungSucks View Post

Im gonna use this memory now on my Rampage III GENE LGA1366 motherboard that support only triple channel and has 6 slots
G.Skill 16GB Quad Kit Ripjaws Z (4x4GB), DDR3 2133MHz, CL 11-11-11-30
Should I run it like this?
0 for empty 1 for used slot
Option 1: Triple channel and use only 12GB
[1] [0] [1] [0] [1] [0]
Option 2: Dual channel and use all 16GB
[1] [1] [1] [1] [0] [0]
Any advices?

option 1, triple chanel is suppose to yeild noticable performce gains over dual channel. keep the other stick as a spare. thumb.gif

12GB RAM is all you need, if you find you do need more, use that spare stick and then if you can find a matching 2 x 4GB kit then use all 6 slots with 24GB and triple channel and create a RAMdisk smile.gif
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post #3 of 7
I would agree triple channel > 4 extra GB, especially for gaming.
post #4 of 7
Quote:
Originally Posted by EVGAMatthewH View Post

I would agree triple channel > 4 extra GB, especially for gaming.

It wouldn't even be running in dual channel right? Just Single..

Anyway yes, go with tri channel. You'll have a spare, and if you need more (or can find a similar 2x4gb kit) i'd grab it for 24GB ram! thumb.gif
 
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post #5 of 7
Thread Starter 
Removed.
Edited by SamsungSucks - 3/3/12 at 10:27am
post #6 of 7
On 1366 boards, definitely triple channel is better than dual channel. But comparing dual channel AMD to dual channel sandy bridge...there is no comparison. I ran 1600mhz on dual channel with my 965, and would do maybe 15gb/s in bandwidth, and running 1333 on sandy bridge, i would do 18gb/s. IMC definitely superior. But comparing triple channel on 1366 to dual channel on 1155....i think the 1155 may be equal or slightly better. Can anyone confirm this? Samsung can you run a quick memory bench like aida 64 or something in triple channel and post a screen?
post #7 of 7
There is a lot of misconception about tri-channel performance over dual-channel. Run your 16Gb kit and use all of it. There is only a small % performance increase in running tri-channel vs dual in some tests, and isn't worth it to box upthat 4th module just to run tri-channel.

Here is the recomended configuration for your ram via the Rampage III genie manual on page 2-21:

R3G.png

Here is a thread on all of this info to help you make an informed decision:
http://www.overclock.net/t/681697/the-truth-about-i7-1366-memory-both-dual-channel-vs-tri-channel
Quote:
Originally Posted by ericeod View Post

I've been surprised to say the least to see so many posts about i7 (1366) running tri channel vs dual channel.


So just to help clear up this issue, here are some articles discussing the integrated memory controller, latency and ram speed, and of course, dual channel vs tri channel:






And what about memory speed and latency? Well, in real world applications there is little advantage:

Tech Report: Exploring the impact of memory speed on Core i7 performance, A look at channels, bus speeds, and latencies
by Geoff Gasior, December 1, 2008

Quote:


Although three channels of DDR3 memory might seem excessive, the Core i7 really does seem to make good use of faster memory, at least in synthetic tests. But that was to be expected. The real question is whether those gains translate to real-world applications, and it's here that the results are more mixed. Certainly, in scientific computing tests like Euler3d and MyriMatch, which we already know to be sensitive to memory subsystem performance, faster memory can provide tangible performance perks. However, common desktop applications like those highlighted by WorldBench don't benefit much from higher memory clocks or tighter timings. Neither do most games, which at best show minor frame rate improvements that aren't significant enough for most folks to even notice, let alone appreciate.




Digital Daily: CPU Intel Core i7-920 (Bloomfield)
Aleksandr Mitrofanov, Dec 02, 2008

Quote:


This controller is optimized for operation with DDR3 memory and supports 1-, 2-, and 3-channel access modes. In particular, in using the 3-channel access the bandwidth of DDR3-1066 is 25.6 GB/s, which meets the bandwidth of the QPI bus. Therefore, for the Socket LGA 1366 platform the faster memory is not yet needed for now.


Yes the 1366 CPU does support dual and tri channel via the QuickPath Interface (QPI) link and the on-board memory controller. And yes, you can run dual channel instead of tri channel with minimal impact.


And how does dual channel perform against tri channel? Here is a quick read:

Inside HW: Intel Core i7: Dual-Channel vs. Triple-Channel Memory Mode
Djordje Kovacevic, 20 March 2009

Quote:


First test that we run was Everest and we were really shocked with results. It was clear that memory access was faster in case of dual channel memory mode while bandwidth had very close values. After Everest we were slightly less shocked with results that provided WinRAR test that is very sensitive to memory subsystem performances. It showed only 2-3% difference in performances in favor of dual channel mode. Better performance of dual channel mode showed also DivX test where our test showed 3% performance difference in favor of dual channel mode also. Then we started Blender that showed minor differences between system operating in dual and triple channel memory mode. Nuclear MC also showed minor differences between two memory modes tested here, while 3DMark06 showed almost identical results. We all know that Crysis can react positively in case of better memory performances so results weren’t that much of a surprise. World in Conflict also showed differences in performance levels of both memory modes. Both gaming tests favored system that operated in triple channel mode.












I hope this clears up all the misconception on OCN.

Edited by ericeod - 2/1/12 at 6:31am
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