just be careful which card you're overclocking. The retail, le, or lele. The le is clocked at 250 and can be flashed to the retail bios for a 275 clock. The lele (The infamous newegg one) is clocked at 230, and if you try to flash the bios and overclock it to 275 (Which it probably won't hit), you'll end up overclocking the Ram itself. The 275 one should probably oc to at least 300 or so I believe. I got my info from comments on the cards at neweggs website.