My experience with this memory on my Dell i8600 was bad. At first the stick cleared the MemTest (over several passes) and the Dell diagnostics fine. cpu-z confirmed the timings.
After I installed the memory I began to see artifacts in Doom3 and Half-life 2 that I did not see before. I addition 3DMark03 crashed without completing when it used to complete fine before. One week later the notebook BIOS gives a read error and only 768Mb of the total 1280Mb (1G+256Mb) is recognized. It is the new Premium 1Gb stick that has the error. I RMA it to Outpost. After I put back in my original memory, no more artifacts, no more crashes. I have the latest BIOS and it has no issues with the original memory sticks.
Outpost credits me for the return - minus the shipping for defective memory that they sent me. I called and am now waiting for their "approval" for the $9 shipping credit.
The 1 year warranty should have been a red flag. I have learned my lesson and I will only buy a top level brand that provides a lifetime warranty - like Crucial, or Kingston.