GeIL PC2-6400 DDR2 Ultra 2GB kit

Sandra

In this synthetic benchmark, we are checking how our memory modules compare in terms of bandwidth. In layman's form, it's the rate at which data is read from or stored into memory's IC by processor. We will express memory bandwidth in units of MB/second.

Everest

Memory Read

This benchmark measures the maximum achiveable memory read bandwidth. The code behind this benchmark method is written in Assembly and it is extremely optimized for every popular AMD and Intel processor core variants by utilizing the appropriate x86, MMX, 3DNow!, SSE or SSE2 instruction set extension. The benchmark reads a 16 MB sized, 1 MB aligned data buffer from system memory into the CPU. Memory is read in forward direction, continuously without breaks.

Memory Write

This benchmark measures the maximum achiveable memory write bandwidth. The code behind this benchmark method is written in Assembly and it is extremely optimized for every popular AMD and Intel processor core variants by utilizing the appropriate x86, MMX, 3DNow!, SSE or SSE2 instruction set extension. The benchmark writes a 16 MB sized, 1 MB aligned data buffer from the CPU into the system memory. Memory is written in forward direction, continuously without breaks.

Memory Copy

This benchmark measures the maximum achiveable memory copy speed. The code behind this benchmark method is written in Assembly and it is extremely optimized for every popular AMD and Intel processor core variants by utilizing the appropriate x86, MMX, 3DNow!, SSE or SSE2 instruction set extension. The benchmark copies a 8 MB sized, 1 MB aligned data buffer into another 8 MB sized, 1 MB aligned data buffer through the CPU. Memory is copied in forward direction, continuously without breaks.

Testing GeIL's PC2-6400 2GB kit in Everest gave us some good results though better scores would be possible with lower timings. The sad part is, GeIL's memory voltage of 2.1v didn't allow for that to happen.

Memory Latency

In terms of latency it seems that those default timings and stock speed don't match really well. Going up to 900 and 930 MHz greatly improves latency, even though timings are more relaxed.

Super Pi

This a commonly used application mostly by overclockers. It calculates pi to a number of digits after the decimal point - up to 32 million. We will focus on 1M and 2M tests however.

All results are in seconds. Because this applications stresses both CPU and RAM I have locked the CPU at 1.86GHz and overclocked memory itself. Results are impressive especially with GeIL PC2-6400 running at 930 MHz.