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- 2011-6-4
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http://www.xbox360fanboy.com/200 ... -mirrors-ibm-specs/
http://www-128.ibm.com/developer ... erf/?ca=drs-#table4
At this year's E3 (or thereabouts) Sony proclaimed that their
processor could achieve 200GFLOPS! However, according to IBM's white
paper, only 155.5 GFLOPS was actually achieved (Table 4). BUT, IBM's
tests used all 8 SPEs. The PS3 will only use 7 SPE's, due to
manufacturing yield issues.
The efficiency of the Cell is 75.9% (Table 4), with of a theoretical
peak of 201GFLOPs (Figure 5)--running 8 SPEs at 25.12GFLOPS apiece
(Table 2). Similarly, the theoretical peak for the PS3's processor
will be 176GFLOPS, using 7 SPEs at 25.12GFLOPS apiece. Assuming the
same 75.9% effieciency, we could easily interpolate the PS3's Cell to
be capable of 133.6GFLOPS.
The take home message is that with the PS3 being cabable of 133.6
GFLOPS and the Xbox 360 being capable of 115.2 GFLOPS, the PS3 is not
nearly as far ahead of the Xbox 360 as we were lead to believe. we
should expect relatively similar power coming from both consoles,
processor power, and ease of programming all considered.
虽然是Xbox360fanboy的文章
但是有引用IBM的技术资料
该文所列举的 PS3 FLOPS 数据是 IBM 以实际程式测试所获得的「实测值」
當初 SONY 還鬼扯 201GFLOPs...
如果CPU的GFLOPS差距不太大的话
两部次世代主机的性能差别又在那里呢..... |
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