Selling my old ram since I got new ram coming. Each stick just passed 2 passes of memtest, so they're all good. Run 1600MHz 6-8-6-24 1T 1.65v XMP and clock pretty well from there. Have had em running 1800MHz at stock XMP settings, 1700MHz at 6-7-6-21 1T 1.65v. Heck, they did a wprime 32m run at 2000MHz 7-10-8-28 1T 1.65v. Most of those benches were 2x2GB. Had originally gotten a set of 3x2GB when I was running X58, but then when I switched to P55 grabbed an extra single stick from Mushkin directly. Ran all 4 just fine, any combo of 2x2 should work just fine. If you do use all 4x2GB in one machine, they may not clock as well as just 2x2GB. Asking $100 shipped. Usual rules and info, USPS Priority with Delivery Confirmation, no trades, USA only, Paypal preferred, questions answered.