Intel Core i7 Memory Performance

January 26, 2009 | 10:11

Tags: #benchmarks #channel #compare #comparison #controller #core #ddr3 #dual #i7 #integrated #performance #single #testing #triple #x58

Companies: #corsair #intel

Memory Timings

SiSoftware Sandra Lite 2009.SP1 Beta (15.42)

Website: Sisoftware

Timings: Sisoft Sandra Unbuffered Memory Test

  • 1600MHz 8-8-8-21-1T
  • 1600MHz 9-9-9-24-1T
  • 1600MHz 8-8-8-21-2T
  • 1333MHz 6-6-6-15-1T
  • 1333MHz 7-7-7-18-1T
  • 1333MHz 8-8-8-21-1T
  • 1333MHz 9-9-9-24-1T
  • 1600MHz 8-7-8-18-1T
  • 1708MHz OC 9-9-9-24-2T
  • 1066MHz 5-5-5-15-1T
  • 1066MHz 6-6-6-15-1T
  • 1066MHz 7-7-7-18-1T
  • 1066MHz 8-8-8-21-1T
  • 1066MHz 9-9-9-24-1T
  • 28676.5
  • 28016.5
  • 27668.0
  • 24819.5
  • 24583.5
  • 24140.5
  • 23603.0
  • 19862.0
  • 19605.0
  • 16419.0
  • 16214.0
  • 16075.0
  • 15936.0
  • 15670.0
0
5000
10000
15000
20000
25000
30000
MB/s (higher is better)

Timings: Sisoft Sandra Random Memory Latency Test

  • 1600MHz 8-8-8-21-1T
  • 1600MHz 8-7-8-18-1T
  • 1600MHz 8-8-8-21-2T
  • 1333MHz 6-6-6-15-1T
  • 1600MHz 9-9-9-24-1T
  • 1066MHz 5-5-5-15-1T
  • 1333MHz 7-7-7-18-1T
  • 1066MHz 6-6-6-15-1T
  • 1333MHz 8-8-8-21-1T
  • 1333MHz 9-9-9-24-1T
  • 1066MHz 7-7-7-18-1T
  • 1066MHz 8-8-8-21-1T
  • 1066MHz 9-9-9-24-1T
  • 59
  • 60
  • 61
  • 62
  • 62
  • 64
  • 67
  • 67
  • 71
  • 71
  • 71
  • 75
  • 79
0
10
20
30
40
50
60
70
80
Nanoseconds (lower is better)

Sisoft Sandra tells much the same story, although it doesn't like it at all when we pushed the memory further than its rated values in terms of both latency and frequency, yielding a very poor result. There are huge jumps for frequency elevation rather than very small ones for latency optimisations - the gap is far larger than in Everest.

IMC Performance


IMC: Sisoft Sandra Unbuffered Memory Test

  • CPU Uncore Clock: 2133MHz
  • CPU Uncore Clock: 2667MHz
  • CPU Uncore Clock: 2933MHz
  • CPU Uncore Clock: 3200MHz
  • 19038
  • 19252
  • 19192
  • 19207
0
5000
10000
15000
20000
MB/s (higher is better)

IMC: Sisoft Sandra Random Memory Latency Test

  • CPU Uncore Clock: 2133MHz
  • CPU Uncore Clock: 2667MHz
  • CPU Uncore Clock: 2933MHz
  • CPU Uncore Clock: 3200MHz
  • 80
  • 75
  • 74
  • 72
0
10
20
30
40
50
60
70
80
MB/s (higher is better)

Increasing the memory controller clock alone does little for the raw memory performance, but it does reduce the latency slightly.
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