來源:
http://crd.lbl.gov/~oliker/
「The Potential of the Cell Processor for Scientific Computing」
(Leonid Oliker, S. Williams, J. Shalf, P. Husbands, S. Kamil, K. Yelick)
At 3.2GHz, each SPE requires about 3W [8]. Thus with
a nearly idle PPC and L2, Cellpmachieves over 200 Gflop/s
for approximately 40W of power – nearly 5 Gflop/s/Watt.
Clearly, for well-suited applications, Cell is extremely power
efficient.
算是正式揭露3.2GHz 的 Cell,TDP為40w左右。
這很有趣….8個SPE合起來真的沒有兩個PPE耗電,3.2GHz的XCPU耗電量是85w。
不過這邊也有個問題:PPX和PPE真的差那麼多?照上面算PPE只吃16w左右。
(注意:這時的PPE本身沒有什麼負載、L2也幾乎是閒置)