Retail 3770k purchased 2 weeks ago. No warranty since delidded, cleaned, reset with Cool Laboratory Liquid Pro and IHS glued back on with Alumina thermal sealant. The Good: low voltage, low temps on air cooling (4.8ghz offset overclock load 1.24v-1.28v range on air cooling Venomous-X with 2 fans). The Bad: extremely weak IMC on P67 motherboard, maybe better on your Z68 or Z77. On my P67 will not boot DDR3 2133. Will boot 1866 @ 4.8ghz and 1600 @ 5.0ghz. The Skinny: $330 paypal only shipped USPS priority CONUS lower 48 United States only. Selling AS IS since it is a delidded chip. Pulled out as a working chip that passed IBT at maximum settings. Heatware: http://www.heatware.com/eval.php?id=66881 EDIT: 4.9GHZ IBT MAX SETTINGS ON AIR Retested on a Z68 Asus MIVE. Still no boot for DDR3 2133. However, swapped out to a pair of Ballistix LV 2x4GB DDR3 1866 kit. Booted up under XMP setting DDR3 1866 to 4.8ghz, 4.9ghz, 5.0ghz. Warmer testing ambient, inferior air cooler Prolimatech Armageddon (compared to the Venomous-X used above and definitely to NH-D14). However, passed IBT/linX under maximum settings on mid-high range air cooling 4.9ghz (offset load range 1.33-1.36v) DDR3 1866. 4.9GHZ IBT maximum settings pass: http://i246.photobucket.com/albums/gg84/jhchang69/3770k249ghzMIVEIBT_zpse4d714f9.png With a better air cooler load temps would have been under 80c at 4.9ghz.