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Core i7 940 Review Shows SMT and Tri-Channel Memory Let-down - TechAmok
Core i7 940 Review Shows SMT and Tri-Channel Memory Let-down - [hardware] 07:18 PM EDT - Oct,13 2008 - post a comment
Chinese website
PC Online.cn a worthy review ( partially
translated here) of the Core i7 940 2.93 GHz processor. The processor
is based on the Bloomfield core, and essentially the Nehalem architecture that
has been making news for over an year now. PC Online went right to the heart of
the matter, evaluating the 192-bit wide (tri-channel) memory interface, and the
advantage of HyperThreading on four physical cores. In the tests, the 2.93 GHz
Bloomfield chip was pitted against a Core 2 Extreme QX9770 operating at both its
reference speed of 3.20 GHz, and underclocked to 2.93 GHz, so a clock to clock
comparison could be brought about.
As for the other architectural change, simultaneous multi-threading, that makes its comeback on the desktop scene with the Bloomfield processors offering as many as eight available logical processors for the operating system to talk to, it appears to be a mixed bag, in terms of performance. The architecture did provide massive boosts in WinRAR and Cinebench tests Across tests, enabling SMT brought in performance increments of roughly 10~20% with general benchmarks that included Cinebench, WinRAR, TMPGEnc, and Fritz Chess. With 3DMark Vantage, SMT provided a very significant boost to the scores, with about 25% increments. It didn't do the same, to current generation games such as Call of Duty 4, World in Conflict and Company of Heroes. What's more, the games didn't seem to benefit from Bloomfield in the first place. The QX9770 underclocked at 2.93 GHz, outperformed i7 940, both with and without SMT, in some games. |
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