Comparisons and observations
To see whether running two modules in tandem at high frequencies warrants matching, we took two other high-speed modules from OCZ (DDR EL-PC3500) and Mushkin (PC3200 Enhanced) respectively. We wanted to see if you could just mix and match high-speed modules and expect them to work as well as a specifically matched pair.
Putting them alongside one another and running them on the aforementioned nForce2 test outfit, a small table will seek to summarise the findings.
Highest stable MHz at given timings and 2.7v (dual-channel - nForce2) | Corsair XMS3200LL TWINX | OCZ PC3500 + Mushkin PC3200 |
2-2-2-6-T1 | DDR-414 | DDR-392 |
2-2-3-7-T1 | DDR-425 | DDR-398 |
2.5-2-3-7-T1 | DDR-436 | DDR-417 |
Note the 512MB of total memory and the 256MB DIMM shown below. 2 256MB modules were running effortlessly at DDR-400 2-2-2-6-T1 speeds for the very first time. Putting in our mish-mash of OCZ and Mushkin modules gave us these results at various timings on the ABIT IT7-MAX / P4 2.26B combination.
Highest stable MHz at given timings and 2.75v (dual-channel - i845E) | Corsair XMS3200LL TWINX | OCZ PC3500 + Mushkin PC3200 |
2-2-2-6-T1 | DDR-405 | DDR-386 |
2-2-3-7-T1 | DDR-412 | DDR-390 |
2.5-2-3-7-T1 | DDR-422 | DDR-408 |
We're being a little unfair in not choosing two modules from a rival manufacturer for comparison, or choosing another two non-TWINX modules from Corsair, but the TWINX modules do seem to work well together, and are fine modules in their own right. I'm sure that has a more to do with specific packaging than chance alone.