OCZ DDR2 memory group test

Author: Richard Swinburne
Published: 16th July 2007
Comments (12) Stumble

Test Setup

We attempted to keep a consistent CPU speed through testing, however due to limitations in chipset straps between CPU front side bus and memory bus when overclocking, a closest fit was applied where necessary.

Memory Speeds Tested

    OCZ DDR2 PC2-6400 SLI-Ready Edition
  • PC2-800MHz (lowest latency, 3-3-3-8-15-4tWR-2T) 2.93GHz/266MHz FSB;
  • PC2-800MHz (EPP rated timings, 4-4-4-15-22-2T) 2.93GHz/266MHz FSB;
  • PC2-1156MHz (maximum overclock, 5-5-5-15-32-6tWR-2T) 2.34GHz/267MHz FSB;

    OCZ DDR2 PC2-8500 Reaper HPC Edition
  • PC2-800MHz (lowest latency, 4-4-4-12-22-5tWR-2T) 2.93GHz/266MHz FSB;
  • PC2-1066MHz (EPP rated timings, 5-5-5-15-22-5tWR-1T) 2.96GHz/266MHz FSB;
  • PC2-1178MHz (maximum overclock, 5-5-5-15-33-6tWR-2T) 2.95GHz/268MHz FSB;

    OCZ DDR2 PC2-9200 FlexXLC Edition
  • PC2-800MHz (lowest latency, 3-3-3-9-18-4tWR-1T) 2.93GHz/266MHz FSB;
  • PC2-1151MHz (rated timings, 5-5-5-18-32-5tWR-2T) 295GHz/268MHz FSB;
  • PC2-1210MHz (maximum overclock, 5-5-5-15-34-6tWR-2T) 2.60GHz/269MHz FSB;

    Kingston HyperX KHX9600D2K2/2G
  • PC2-800MHz (lowest latency, 3-3-3-8-18-2T) 2.93GHz/266MHz FSB;
  • PC2-1200MHz (rated timings, 5-5-5-15-31-2T) 2.93GHz/266MHz FSB;
  • PC2-1232MHz (maximum overclock, 5-5-5-15-32-2T) 2.964GHz/270MHz FSB;

    Corsair CM2X1024-9136C5D
  • PC2-800MHz (lowest latency, 3-3-3-6-14-4tWR-2T) 2.93GHz/266MHz FSB;
  • PC2-1142MHz (rated timings, 5-5-5-15-30-5tWR-2T) 2.93GHz/266MHz FSB;
  • PC2-1200MHz (maximum overclock, 5-5-5-15-33-6tWR-2T) 2.93GHz/266MHz FSB;

    Corsair CM2X1024-10000C5D
  • PC2-800MHz (lowest latency, 3-3-3-6-10-3tWR-2T) 2.93GHz/266MHz FSB;
  • PC2-1250MHz (rated timings, 5-5-5-18-15-6tWR-2T) 2.981GHz/271MHz FSB;
Intel Core 2 Extreme X6800 (operating at 2.93GHz - 11x266); Inno3D nForce 680i SLI, Nvidia Geforce 7900GTX; Seagate 7200.9 200GB 7200RPM SATA 3Gbps hard disk drive; OCZ GameXStream 700W power supply unit; Windows XP Professional Service Pack 2; DirectX 9.0c; Nvidia Forceware 94.24 WHQL; Nvidia nForce 680i SLI 9.53 WHQL;

Memory Latency


Memory Latency

Sisoft Sandra Random Memory Latency Test

  • OCZ DDR2 PC2-6400 SLI-Ready Edition (800MHz Low Latency)
  • OCZ DDR2 PC2-6400 SLI-Ready Edition (800MHz)
  • OCZ DDR2 PC2-8500 Reaper HPC Edition (800MHz)
  • OCZ DDR2 PC2-9200 FlexXLC Edition (800MHz)
  • Kingston HyperX KHX9600D2K2/2G (800MHz)
  • Corsair CM2X1024-9136C5D (800MHz)
  • Corsair CM2X1024-10000C5D (800MHz)
  • OCZ DDR2 PC2-8500 Reaper HPC Edition (1066MHz)
  • Corsair CM2X1024-9136C5D (1142MHz)
  • OCZ DDR2 PC2-9200 FlexXLC Edition (1151MHz)
  • OCZ DDR2 PC2-6400 SLI-Ready Edition (1156MHz)
  • OCZ DDR2 PC2-8500 Reaper HPC Edition (1178MHz)
  • Kingston HyperX KHX9600D2K2/2G (1200MHz)
  • Corsair CM2X1024-9136C5D (1200MHz)
  • OCZ DDR2 PC2-9200 FlexXLC Edition (1210MHz)
  • Kingston HyperX KHX9600D2K2/2G (1232MHz)
  • Corsair CM2X1024-10000C5D (1250MHz)
  • 72
  • 77
  • 77
  • 67
  • 68
  • 90
  • 90
  • 70
  • 84
  • 70
  • 70
  • 69
  • 67
  • 69
  • 68
  • 68
  • 66
0
10
20
30
40
50
60
70
80
90
nanoseconds (lower is better)

Everest Memory Latency

Everest Memory Latency

  • OCZ DDR2 PC2-6400 SLI-Ready Edition (800MHz Low Latency)
  • OCZ DDR2 PC2-6400 SLI-Ready Edition (800MHz)
  • OCZ DDR2 PC2-8500 Reaper HPC Edition (800MHz)
  • OCZ DDR2 PC2-9200 FlexXLC Edition (800MHz)
  • Kingston HyperX KHX9600D2K2/2G (800MHz)
  • Corsair CM2X1024-9136C5D (800MHz)
  • Corsair CM2X1024-10000C5D (800MHz)
  • OCZ DDR2 PC2-8500 Reaper HPC Edition (1066MHz)
  • Corsair CM2X1024-9136C5D (1142MHz)
  • OCZ DDR2 PC2-9200 FlexXLC Edition (1151MHz)
  • OCZ DDR2 PC2-6400 SLI-Ready Edition (1156MHz)
  • OCZ DDR2 PC2-8500 Reaper HPC Edition (1178MHz)
  • Kingston HyperX KHX9600D2K2/2G (1200MHz)
  • Corsair CM2X1024-9136C5D (1200MHz)
  • OCZ DDR2 PC2-9200 FlexXLC Edition (1210MHz)
  • Kingston HyperX KHX9600D2K2/2G (1232MHz)
  • Corsair CM2X1024-10000C5D (1250MHz)
  • 59.4
  • 62.0
  • 61.9
  • 55.9
  • 55.7
  • 60.4
  • 60.8
  • 57.4
  • 56.8
  • 57.2
  • 58.0
  • 57.3
  • 56.2
  • 56.6
  • 55.9
  • 56.4
  • 55.6
0
10
20
30
40
50
60
nanoseconds (lower is better)

The 9200 FlexXLC performs appreciably as fast as the 9600 Kingston at 800MHz low latency, with the SLI edition memory only being a fraction slower, even though it's supposed to be only CAS-4 at 800MHz. Using the modules up to the EVP limit means it'll do CAS-3 with ease. The Reaper 8500 unfortunately only does CAS-4 low latency 800MHz and only achieves a modest overclock.

At faster speeds the performance of the OCZ memory is approximately the same as the other memory at similar speeds.

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