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To: fingolfen who wrote (135083)	5/15/2001 2:11:34 PM
From: pgerassi	Read Replies (2) \| Respond to of 186894

Dear Fingolfen: Liquid N2 cooling of Tbird is at 2+GHz too. So P4 isn't any better in clock and definitely not better in performance. Besides, you said A4 will hit a wall. Walls only occur when there is a speed path thats limited. P3 is also heat limited (the lowering of max die temp and up the voltage shows that as well). At a max die of 95C, P3 stops at 866 or 933MHz, P4 is at 1.7GHz (do not know if 70C at spreader is the same as 95C on die) and Tbird currently ships at 1.33GHz. A4 is said to be sampling at 1.8GHz somewhere. Power consumption figures for lower speeds seem to bear that 1.8GHz is likely. But, that may not be the end of the line on A4 GHz. The increase in voltage on P4 is probably signalling EOL on 0.18u Al. just as the same signalled the last EOL of P3 0.18u (a bit farther by decreasing max die temp). Tbird looks like it could release 1.53GHz, if needed but, A4 is going to start there and its probably time. To repeat answer to your question, 4-5(00)MHz. Pete