Included with my delivery this morning was Scan's Corsair Value Select 1Gb DDR 400 Mhz memory (LN5680). This is clearly advertised as having CAS latency 2.5. However, looking at the memory modules themselves, I notice they are the CAS 3 versions (corsair product code VS1GBKIT400C3).
I haven't tried them out yet, so I don't know if they will run at 2.5, but would it be better to not open the package and return them for the right ones?
Mark