Does anyone have any experience running Numpy under Linux on a Pentium 4 (P4) system? P4 boxes appear to have some attractions: a 1.7 GHz model is now available, they reputedly have a 400 MHz CPU-to-RAM bus, the Intel 850 chipset used with them supports ECC and the cost of ECC RDRAM needed has fallen to the point that 1 Gbyte of RAM is now quite affordable. It's the high CPU-to-RAM bandwidth which suggests that P4 systems might offer a gain in performance when used with Numpy to manipulate large arrays which is disproprtionate to their higher clock speeds, compared to Pentium 3 systems, which are limited to a 133 MHz CPU-to-RAM bus. Is this born out in practice? Ideally we would like an Alpha box, but they just cost too much from Compaq and I don't think Microway or other alternative Alpha box manufacturers are represented here in Australia. Our problem domain involves a mix of manipulating very large integer arrays and then floating point calculations on smaller arrays, so FP speed is probably not of paramount importance, but memory bandwidth and clock speed probably is (perhaps, maybe, possibly). Tim C Sydney, Australia