OCZ 4GB DDR2 PC2-6400 VP Platinum Dual Channel

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PCMark05 and F.E.A.R.

For our next round of benchmarks, we ran the Memory performance module built-into Futuremark's PCMark05. Below is Futuremark's explanation of what the memory test actually does.

Performance Comparison with PCMark05
Overall Memory Score

"The Memory test suite is a collection of tests that isolate the performance of the memory subsystem. The memory subsystem consists of various devices on the PC. This includes the main memory, the CPU internal cache (known as the L1 cache) and the external cache (known as the L2 cache). As it is difficult to find applications that only stress the memory, we explicitly developed a set of tests geared for this purpose. The tests are written in C++ and assembly. They include: Reading data blocks from memory, Writing data blocks to memory performing copy operations on data blocks, random access to data items and latency testing." 

Both the OCZ DDR2 PC2-6400 and PC2-8800 modules performed on the same level, showing no distinct advantages between 2GB and 4GB.  The PQI PC-4200 posted a lower score, which was expected with its lower frequency.
In-Game Performance Comparisons
System Memory Affects Framerates?  You Betcha!

We continued our testing with both low-resolution and high-resolution F.E.A.R. tests. Despite the fact that this is a game benchmark that can be used to test the relative performance of video cards, frame rates are strongly influenced by processor speed and available memory bandwidth, especially at low resolutions.  After running the test at 640x480 to focus performance on the subsystem components, we bumped the resolution up to 1024x768 to see whether 2GB vs 4GB resulted in any measurable performance differences.


Quite frankly, we expected a bit more variation in the frame rates at 1024x768, but each run was dead-on around 86FPS.  The most notable differences were recorded at the low resolution of 640x480, where the 4GB OCZ Platinum kit edged out the 2GB OCZ Gold series by 6FPS.  The 1GB PQI Turbo series trailed by no less than 22FPS, which wasn't a total surprise since it is competing against memory clocked 266MHz faster.

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