Intel Pentium EE 955 running at 4.27GHz on air

To play safe and ensure it's not a fluke, i.e, one "special" chip in a thousand, I got the following two setups, each with its own Presler XE; one based on the Intel D975XBX mainboard and Zalman 460W PS; and the other one using Asus P5WD2-E 975X-based board and MGE XG Magnum 500W PS - running both the stock cooler and Zalman one on each board setup, by the way. Both board sets used Corsair TwinX5400UL low latency DDR2 memory running at CL 3-2-2-6 at 533 MHz, CL 3-2-2-7 at 600 MHz or CL 4-3-3-9 at 800 MHz (see photos)..