1600mhz 9-9-9-24 vs. 1333mhz 7-7-7-21 ?

[yh1169]

CPU: i5 2500K Overclocked to 4.5Ghz
MoBo: Asus p8p67


1600mhz 9-9-9-24 Ram
i.e.)
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231428&cm_re=ripjaws_x-_-20-231-428-_-Product

Vs.

1333mhz 7-7-7-21 Ram
i.e.)
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231440&cm_re=ripjaws_x-_-20-231-440-_-Product
???

The price difference is small, assuming they are negligible, which is the better choice?

 

[Motopsychojdn]

Go for the better timings of the 1333MHz imo, and are you going to get good use out of 8Gb (other program outside gaming ofc) or would 4Gb actually be sufficient for you?
Moto

 

[Leaps-from-Shadows]

With modern processors, RAM speed makes more difference than RAM timings. The DDR3-1600 will perform better on a Sandy Bridge system.

I no longer recommend 4GB of RAM on any new system. 6GB is the minimum I recommend while 8GB would provide a bit more longevity. They provide smoother performance while gaming and doing normal multitasking, and RAM is cheap.

 

[christop]

I would go with the 1600 its faster.

 

[simon12]

The 1600 is better but the difference would be totally unnoticeable except in benchmarks.

 

[wolfram23]

Go with the 1600mhz RAM, increase the voltage from 1.5 to 1.65, and put the timing down to 8-8-8-24.

 

[cromedome]

<<< Lower latency (timings) <<< =

>>> Higher frequency (MHz) >>> =

7, 7, 7, 20 DDR3 at 1,333MHz is faster than 9, 9, 9, 24 DDR3 at 1,333MHz.

7, 7, 7, 20 DDR3 at 1,600MHz is faster than 7, 7, 7, 20 DDR3 at 1,333MHz.

To figure out which is faster, so far as a combination of frequency and timings, the general formula is:

x = CAS (first number in the timing set) ÷ Frequency

For example:

a) 7, 7, 7, 20 DDR3 at 1,333MHz. 7 ÷ 1333 = ~0.00525

b) 9, 9, 9, 24 DDR3 at 1,600MHz. 9 ÷ 1600 = ~0.00563

Therefore, a is faster than b, as a has a latency 7.2% lower than b. It takes the least time to perform an operation.

When overclocking, to take the RAM out of the equation, set loose (high) timings and low frequencies, so you are effectively running the RAM at quarter throttle. Once you have your CPU overclock steady, gradually increase RAM frequencies and/or lower RAM timings to get the fastest possible RAM speeds.