Pros: Works on dell r300 Was worried it wouldn't work, but after reading someone else had it working on dell r805, decided to take a risk After installing on the first two ( white banks ) on the motherboard, and booting up, it gave amber error by dell bios, indicating memory configuration error. There was worry it wouldn't work at all. However, once switched to the last two banks ( of the four black banks ) on the motherboard, it booted up fine. This may have something to do with the fact that these two rams are paired up. Currently the config is 1gbx2 on the white banks, 1gbx2 on the first two black banks, and the last two has the 2gbx2 from kingston purchased here. the 1gbs came with the dell ( so they were dell certified )

Cons: may not work on the first two designated banks on dell r300

Overall Review: For the price paid in total ( 14x.xx dollars ), comparing to official dell ram, this is an amazing deal, even with the shipping costs!