Which ram is faster?

[mcmad358]

I need help deciding which ram to get:

 

G.Skill Ripjaw x 1866Mhz at 8Cas

 

or

 

G.Skill ripjaw X 1600 and 7Cas

[SpecTre12345]

1866MHz @ Cas 8 = 8.57ns

 

1600MHz @ Cas 7 = 8.75ns

 

The 1866 kit is faster.

[Dredgy]

@mcmad358 1866Mhz kit is marginally faster, though the difference is measured in picoseconds (from when the CPU requests access to data until the RAM has the data available to access), so you aren't going to have a noticeable performance at all. For all intents and purposes they are equivalent. Get the 1866Mhz kit only if the price difference isn't substantial

[patrickjp93]

@mcmad358 1866Mhz kit is marginally faster, though the difference is measured in picoseconds (from when the CPU requests access to data until the RAM has the data available to access), so you aren't going to have a noticeable performance at all. For all intents and purposes they are equivalent. Get the 1866Mhz kit only if the price difference isn't substantial

Nanoseconds. mega = 10^6. Also, DDR means 1866 = 933 * 10^6 cycles/second in actual clock speed (remember asynchronous clocks for up and down streams).

[dragosudeki]

As far as performance goes, the faster one wouldn't  really benefit unless your using an APU and maybe some crazy video editing?

[patrickjp93]

As far as performance goes, the faster one wouldn't  really benefit unless your using an APU and maybe some crazy video editing?

CPU-heavy video games like GW2 would benefit as well. Audio mixing too, or testing a heuristic search on a large (LARGE) data set like I had to yesterday.

[Dredgy]

Nanoseconds. mega = 10^6. Also, DDR means 1866 = 933 * 10^6 cycles/second in actual clock speed (remember asynchronous clocks for up and down streams).

Nanoseconds. mega = 10^6. Also, DDR means 1866 = 933 * 10^6 cycles/second in actual clock speed (remember asynchronous clocks for up and down streams).

Sorry, was assuming the calculations in the first response were correct. In which case the difference was like .2 nanoseconds...so picoseconds.

No way to do my own maths atm as on a terrible phone and travelling.