Memory Tests
The memory tests are designed to highlight the general performance of the memory subsystem. The SN95G5's performance relative to the K8T Gem and older Socket 940 FX-53 system are what we're interested in, comparing both FX-53 types on three different chipsets. We use a trio of tests to analyse said performance, Pifast is up first. It's our own custom test to 10M decimal places.Pifast

The SN95G5 with FX-53 and 512MB of memory runs ever so slightly slower than the other S939 system, with the S940 system bringing up the rear.
Sciencemark 2.0 - Bandwidth
Sciencemark 2.0 measures peak CPU to memory controller bandwidth, the bandwidth available to the CPU for memory intensive tasks. It doesn't take into account any excess bandwidth available on the memory controller, that may or may not be usable by other peripherals.
The SN95G5 edges out the K8T Gem by a testing margin of error, with the S940 (that needs registered DDR, sucking up some bandwidth) CPU a little behind.
Sciencemark 2.0 - Access Latency

That registered memory requirement of the Socket 940 FX-53 means that it accesses main memory with added latency, compared the S939 CPU that can use unbuffered DIMMs.