Read performance benefits more from lower latency than outright bandwidth, however write performance is more affected by bandwidth than latency.
Everest Memory Latency
Everest Memory Latency
Corsair TWIN3X2048-1800C7DF G (1333MHz LL)
Super Talent W1866UX2G8 (1333MHz LL)
Corsair TWIN3X2048-1800C7DF G (1800MHz LL)
Corsair TWIN3X2048-1800C7DF G (1800MHz)
Corsair TWIN3X2048-1800C7DF G (1868MHz)
Super Talent W1866UX2G8 (1868MHz)
52.3
52.1
58.5
63.8
60.5
61.7
0
10
20
30
40
50
60
70
nanoseconds (lower is better)
5-5-5-15-1T is obviously quicker than CL-7s or 8s, but interestingly just 66MHz of 1,866MHz at CL-8 is a few ns faster than 1,800MHz Cl-7.
Unbuffered Memory Performance
Sisoft Sandra Unbuffered Memory Test
Corsair TWIN3X2048-1800C7DF G (1333MHz LL)
Super Talent W1866UX2G8 (1333MHz LL)
Corsair TWIN3X2048-1800C7DF G (1800MHz LL)
Corsair TWIN3X2048-1800C7DF G (1800MHz)
Corsair TWIN3X2048-1800C7DF G (1868MHz)
Super Talent W1866UX2G8 (1868MHz)
6835.0
6856.3
8764.5
8250.8
8738.3
8611.5
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
MB/s
Memory Latency
Sisoft Sandra Random Memory Latency Test
Corsair TWIN3X2048-1800C7DF G (1333MHz LL)
Super Talent W1866UX2G8 (1333MHz LL)
Corsair TWIN3X2048-1800C7DF G (1800MHz LL)
Corsair TWIN3X2048-1800C7DF G (1800MHz)
Corsair TWIN3X2048-1800C7DF G (1868MHz)
Super Talent W1866UX2G8 (1868MHz)
63
62
55
64
57
58
0
10
20
30
40
50
60
70
nanoseconds (lower is better)
Sandra offers an alternative, indicating that a combination of bandwidth and latency make for faster memory and again the Corsair 1,800MHz at 7-6-6-18-1T seems to perform the best.
At the same 1,866MHz speed and latency, the Super Talent memory seems to always come out a fraction slower in these synthetic benchmarks.
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