I have been told that for a

ASUS Z87-C Z87 S-1150 ATX motherboard

I can choose between these two memory modules

 

Kingston 8 Gb 2400 MHz

http://www.dustinhome.se/product/5010665870/kingston-8gb-2400mhz-ddr3-cl11-xmp-hyperx-beast-2x4gb/

 

and

 

Corsair 8 Gb 1866 MHz

http://www.dustinhome.se/product/5010549888/corsair-8gb-ddr3-1866mhz-2x4gb-cl9-vengeance/

 

prices about the same. First impulse might be to pick Kingston for the higher speed but two things I have heard might render that a mistake

1) Kingston has CL11 and Corsair CL9

And the lower the CL the better I understand so here Corsair is the better or does it matter less than clock speed ?

2) I have heard that when overclocking a haswell CPU you can get problem with the memory clock frequency

So if I overclock my CPU do I run into the risk of not being able to run the Kingston RAM at 2400 MHz ?

 

 

Kingston 8 Gb 2400 MHz
http://www.dustinhom...rx-beast-2x4gb/

 

Go with these. If you run into mem problems, you can always downclock you Ram freq.

The kingston not sure the Corsair do c11 at 2400 but the kingston do Cl9 at 1866.

Normaly up to 2666 no problem with haswell.

When testing a get My LV2600 ( rated 2600mhz) to 3190mhz cl12 and

G- Skill 2133 cl9 to 3060mhz cl14

Run fsx at 2666 cl 12 with th G-Skill and 2600 cl8 or 3000 cl12 with teamG

Tune the mems is the same as you OC the CPU but little more tricky.

I sure evry haswell do up to 2666 with xmp settings most problem was due to

Bios ( first realease) or Messing up the settings.

The higher frequency is more important when overclocking. I'm not an OCing expert by any means but can say from experience. I personally wouldn't get either of the choices you have.

 

I have i5 3570K @ 4.4Ghz on air with this RAM and mobo comb:

 

 G.SKILL Trident X Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 2400 (Cas Latency 10) (Timing 10-12-12-31)

GIGABYTE GA-Z77X-UD3H

 

For the overclocking, all I did was manually configure the RAM voltage and select a profile built-in to the BIOS then bump up the CPU multiplier till I hit 4.4Ghz.

 

Been very stable. I can't recommend G.Skill RAM enough. I've used it in every build of mine and friends for the last 6 years or so.

 

 

The higher frequency is more important when overclocking. I'm not an OCing expert by any means but can say from experience. I personally wouldn't get either of the choices you have.



I have i5 3570K @ 4.4Ghz on air with this RAM and mobo comb:



G.SKILL Trident X Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 2400 (Cas Latency 10) (Timing 10-12-12-31)

 

I mentioned these two since they were suggested also tested on my intended mobo. I can't see that it's clear that yours would be better. At any rate my intended dealer don't have them.

 

 

The kingston not sure the Corsair do c11 at 2400

 

They are specified to do no morte than 1866 MHz although one custumer reviewer told he could overclock them to 2000 MHz.

Mems is mems its aj jungle , the cl11 2400 and Cl9 1866 i a cheap hynix chip

The 2400 have a better binning . Corsair Gskill kingston you name it .

Then the 2400 cl 9 is mostly samsung chip and also 2666 cl10 with better binning.

Most vendors have same chip lock at the timings you can check it take of the heatspreaders and lock

Lower CL at the same frequency is better. When you compare different frequencies you have to do a bit of maths to see what RAM that is actually better when it comes to CAS latency. CL x 2000 / Frequency will tell you the actual CAS latency in ms. (the smaller the better). 9 x 2000 / 1866 = 9.65ms, 11 x 2000 / 2400 = 9.17ms. So the Kingston kit is specified to be better at both frequency and latency even thou the CL number is higher. Get the Kingston kit.

Lower CL at the same frequency is better. When you compare different frequencies you have to do a bit of maths to see what RAM that is actually better when it comes to CAS latency. CL x 2000 / Frequency will tell you the actual CAS latency in ms. (the smaller the better). 9 x 2000 / 1866 = 9.65ms, 11 x 2000 / 2400 = 9.17ms. So the Kingston kit is specified to be better at both frequency and latency even thou the CL number is higher. Get the Kingston kit.

Thanks Lars, for your explenation for me its kind of clear and my strong side is not to explain in eng.

Here is mine "super mems" compare them in latency agianst these mainstream mems.

8 x 2000/2600=6.15ms one of the reasons to get high performance in FSX.

This setting is faster then 3000 cl12 in FSX.

CL8 @ 2600Mhz. That's seriously impressively low RAM cas latency. Nice sticks you have there. Anything 8.5ms- is very low latency. 7.5ms- is extremely low latency. What chip are on those sticks?

 

 

What chip are on those sticks?

 

Samsung Rev. D

Its one of a kind kit " Golden sample" 2000mhz cl9 @1.3V and scale to 2.05V

 

 

Here is mine "super mems" compare them in latency agianst these mainstream mems.

8 x 2000/2600=6.15ms one of the reasons to get high performance in FSX.

 

What memory modules are these and where did you buy them ? Do you have url link ?

Get them from team group its a enginering sample , sorry they dont sell them the

Closest is TeamGroup LV2800 shall be the same chip but not sure they ar as good as

This kit.