Review: Pentium 4 with i845

Memory performance

We use our own tool tecMem, which will be publicly available later this year, to evaluate memory performance. Here we put i845 with a Willamette at 1500 MHz and PC-133-memory (CAS latency 2) against a Pentium 4 with PC800 memory.

The transfer curves also indicate the caches sizes: 8 KByte L1, 256 KByte L2, even for the CPU made for Socket 478.

Our sample of a P4 for Socket 478 was clocked around 20 MHz higher than the production Pentium 4, which explains the slightly higher scores for cached transfers. The different clock speeds may be explained by a pre-production motherboard that had not had its clock generator locked properly.