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Understanding ram speeds?

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July 21, 2013 6:19:13 PM

Is 9 cas 1866 faster than 7 cas 1600? How exactly do all of these things specs work?
Is the difference too small to notice?
a b } Memory
July 21, 2013 6:31:30 PM

because of the difference in latency there is little difference between the 2. when you go to 2100-3200 you will see an increase if your hardware fully supports the higher speed. problem is most of it doesnt. intel for instance handles 1333-1866 depending on what gen i3/i5/i7 is being used. running faster ram on these builds wont actually give you more performance apart from in synthetic benches.

ddr3 1600 cas 9 is as efficient as ddr3 1866 cas 11 with less than 1% performance difference. me i still prefer to get the lower cas ram over the higher speeds 1s i reach the maximum native memory support offered by the cpu.
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a c 1942 } Memory
July 21, 2013 6:32:58 PM

As freq goes up, you are actually getting more bandwidth of DRAM that can operate per clock cycle and process data....Actual performance is a combination of freq and CL (CL is how many clock cycles it takes to perform an operation) so technically in your question the 1600/7 would perform slightly better than the CL9/1866........if it were 1600/8 and 1866/9 the 1866/9 would get the slight nod for the higher bandwidth...in general w/ performance DRAM you'll look at a step chart where performacne is given to the higher freq for the higher bandwidth

1600/7 1866/8 2133/9 2400/10 2666/11 2800/12

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