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G.Skill Flare 7-9-7-24 and 9-9-9-24

post #1 of 5
Thread Starter 
I've owned my 9-9-9-24 set of 8GB ddr3, 2000MHz for some time now. I noticed G.skill later came out with another set which is identical aside from the timings, 7-9-7-24 DDR3 2000MHz but with a higher pricetag. I just went and switched my timings to 7-9-7-24 in bios, im running memtest and posting this message right now, with no problems so far (uptime 20minutes).

Is the system supposed to be stable? if both versions work with same timings .... ***? I'm not an expert in memory overclocking and timings, is this normal?

the rams I'm talking about are F3-16000CL7D-4GBFLS and F3-16000CL9D-4GBFLS
ARC Midi
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ARC Midi
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post #2 of 5
If your running memtest durning boot up and not in windows and it passes then its fine.

Lower cas allows for quicker ram calculations essentially. The one gskill offered are probably just binned for lower cas so that is why they are more expensive.
Edited by lilraver018 - 3/5/12 at 1:35pm
Casmatic
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Casmatic
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post #3 of 5
Thread Starter 
Do you think there is any difference between the CL7 model and CL9 model? (Only difference that they decided to stick a CL9 sticker on it instead of CL7?)

I'm running memtest (windows software), prime 95 and installing sisoft sandra, no issues so far.

So its probably safe to run the ram 24/7 at the lower timings?
ARC Midi
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Intel 910 SSD 400GB samsung evo 840 120GB Mechanical drives (2) Corsair Hydro Series™ H110i GTX  
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ARC Midi
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AMD FX8350 Asus Crosshair IV Formula 3029 Asus Strix GTX 980 Ti G.Skill Ares 16GB @ 1866 (9-10-9) 
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Intel 910 SSD 400GB samsung evo 840 120GB Mechanical drives (2) Corsair Hydro Series™ H110i GTX  
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post #4 of 5
^^^ There is no way to know for sure without opening the DIMMs to see if they use the same ICs but it's possible they are identical, just speed binned.

If your system remains stable with Prime 95, OCCT and/or Linpack stress testing then the lower latencies should be fine. If not just return them to the minutely slower timings. You won't notice any difference in system performance either way. wink.gif

Testing on both AMD and Intel desktop PCs has shown that with DDR3 RAM there is little to no tangible performance gains in real applications on desktop PCs once you get above ~1333 MHz.

http://www.overclock.net/t/1206332/help-me-through-my-bottleneck-6-7-6-24-1t-1333mhz/20#post_16432691

AMD Llano/APUs are the exception as both the CPU and GPU can access the higher frequency and that does improve real world performance. Increased frequency is best with the APUs. Testing indicates that latencies don't make any tangible diff. as the frequency increases above ~1333 NHz.

As the frequency increases one clock cycle becomes less and less in real time thus making latency changes less noticeable.. Since the DDR3 RAM isn't a system bottleneck there isn't much to be gained. Some folks have OC'ed the FX CPU RAM to 2400 MHz. and seen ZIP for performance gains because the RAM is not limiting performance.

Benches will show a little improvement but that doesn't seem to transfer to real apps. for most folks.

Even though DDR4 is becoming available Intel has even announced they will stick with DDR3 until 2014 because it's not a bottleneck.

http://www.fudzilla.com/home/item/26169-intel-sticks-with-ddr3-till-2014
Edited by AMD4ME - 3/5/12 at 2:13pm
post #5 of 5
I think thats how alot of G.Skill memory is. I have a set of 8-8-8-22 1333 that will do 8-8-8-22 1736 stable and possibly higher, I never tried.
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