PiFast
A good indicator of CPU/Motherboard performance is version 4.2, by Xavier Gourdon. We used a computation of 10000000 digits of Pi, Chudnovsky method, 1024 K FFT, and no disk memory. Note that lower scores are better, and times are in seconds.
Pentium 4 @ 12x200

As with the synthetic tests, the ProSeries holds down the fort. Mushkin places second again, and finishes about a second and a half behind the leader.
Pentium 4 @ 12x250

The improved timings of the ProSeries is too much for the other three, but the Mushkin still manages to finish in second place, despite timings that were not as aggressive as OCZ and Kingston.
Pentium 4 @ Maximum OC (Mushkin @ 280FSB)

Again, Mushkin takes the silver in this race.
TMPGEnc MPEG Encoding
Video editing is a taxing chore, and we'll be testing the Mushkin PC4000 using TMPGEnc 2.512 to encode a 7.78MB, 1:30 movie trailer to a 24FPS MPG file. Note that lower scores are better. All memory timings are at 2-3-3-5 at 200FSB.
Pentium 4 @ 12x200

Pentium 4 @ 12x250

Pentium 4 @ Maximum OC (Mushkin @ 280FSB)

Dead even at 200 and 250FSB, so there isn't much difference between the four here. We are planning changes to our test suite, but due to time constraints, I still relied on the smaller movie file. At the maximum OC, the Mushkin finally catches up with Corsair for a first place tie.