My Dell Dimension E510 with the 945P chipset has been very reliable. So I decided to swap out to a faster LGA775 Presler processor on the mobo. After some researching, I found out from others that the faster 950,960,etc Pentium D's didn't work so I choose the SL9QB Pentium D 945 (3.4Ghz/4M/800/65nm). According to http://www.cpubenchmark.net/cpu_list.php (as of today), the processor ranks #445. Not impressive - I know. However, coming from a #511 ranked SL88T Pentium D 820 (2.8Ghz/2M/800/90nm), it definitely feels snappier thanks to its double L2 cache size. Nonetheless, this $80 upgrade will probably postpone a newer expensive PC upgrade for a couple years. Deal.