Need help on RAM. Urgent !

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thuannt05

thuannt05

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Oct 14, 2014
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I've to decide what to pick by to day or I'll have to wait for a whole week for the shipping

I picked G.Skill F3-14900CL9D-8GBXL (2x4GB) but they were out of stock, so I have to pick another pair for dual channel. There are only few options left for me to pick, hope you guys can help on this. Thank in advance

Keep in mind that I will only run at BUS 1600 These are the ONLY options I can pick

The other parts of my system:
Mainboard Gigabyte B85M - D3H
CPU Core I5 - 4460 (3.2Hz)
HDD 1TB WD (Black) - WD1003FZEX
VGA Palit Nvidia GTX 970 JetStream 4GB ( 256 Bit ) DDR5
Case CM - Silencio 352
PSU CM V650W


G.skill:
G.Skill F3-2400C11D-8GXM (2x4GB) : this one has pretty high CL 11-13-13-31-2N and bus 2400

Corsair:
Corsair C9R CMZ8GX3M2A (2x4GB) : this one's CL 9-9-9-24 and bus 1600

Again, Keep in mind that I will only run at BUS 1600
 
Solution
jossrik
Downclocking is fine, and RAM doesn't get all that hot. You should be able to set it to 1600 in the bios and leave everything else on auto and it will adjust you to the 1.5v, BUT. big but, you're prolly gonna want to set everything to run as fast as it can at 1600. You can prolly get the G Skillz to run at around CL 8 or less at 1600 1.5v. You'll have to play with it. Also, I go back on what I said earlier, didn't see that one set is 2400. Makes a big difference when you downclock them. I have a set of 2400 CL10 from TEAM that I like a lot, they aren't the fastest, but I got a great deal on 8Gb. And oh ya, remember, real world you probably won't notice the difference between a really nice fast set and a really cheap not fast...
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jossrik

jossrik

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When possible go with the lower latency, basically it's faster, even though either way it's 1600. Get the Corsair. Oh ya, also, you probably wouldn't notice the difference between the two even if you were running them side by side. But ya, lower latency at same speed is more better.
 
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IInuyasha74

IInuyasha74

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May 1, 2013
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I would go with the 1600Mhz RAM just because it is at 1.5v, I don't like using RAM at higher than average voltage and the G.Skill is 1.65v.

In terms of performance, the G. Skill has better performance. Latency can be calculated using the following formula for DDR3.
(CL/Frequency)2000=Latency in nanoseconds

So for the G. Skill RAM
(11/2400)2000=9.17 ns

The Corsair:
(9/1600)2000=11.25 ns

While this isn't 100% accurate as the other timings have an effect too, its still pretty accurate. The Corsair has 22% greater latency than the G. Skill, so if you are looking at just performance, G.Skill wins.
 
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thuannt05

thuannt05

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Aside from the more heat those 1.65 sticks generate, are there anything to worry about? Will downclocking them to 1.5V affect anything? Or will just make it comsume less power and generate less heat? And will I ever need to downclock it?

How to downclock Gskill to 1600, just adjust the Voltage of those RAM sticks in BIOS?

thats a lot of questions at once, but I have so little time to do all those research, hope someone who knows can explain to me. Thanks
 
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jossrik

jossrik

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Sep 26, 2002
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Downclocking is fine, and RAM doesn't get all that hot. You should be able to set it to 1600 in the bios and leave everything else on auto and it will adjust you to the 1.5v, BUT. big but, you're prolly gonna want to set everything to run as fast as it can at 1600. You can prolly get the G Skillz to run at around CL 8 or less at 1600 1.5v. You'll have to play with it. Also, I go back on what I said earlier, didn't see that one set is 2400. Makes a big difference when you downclock them. I have a set of 2400 CL10 from TEAM that I like a lot, they aren't the fastest, but I got a great deal on 8Gb. And oh ya, remember, real world you probably won't notice the difference between a really nice fast set and a really cheap not fast set, there just isn't much performance difference between say 1333 and 1866 and 2133, couple percent, so maybe a frame or two in gaming. All relative.

Unrelated, well, kinda related, why only 1600?
 
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