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How CPU Features Affect CPU Performance, Part 5

Intel Core i7, number of cores.

November 23, 2009



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Java

Without Turbo Boost and Hyper-Threading



With Turbo Boost and Hyper-Threading



Like in the previous case, SPECjvm2008 demonstrates good scalability without any slumps.

Compared to AMD Phenom II X4



And that's the second test, where scalability of Core i7 turns out to be a tad better than in its competitor.

3D games

Without Turbo Boost and Hyper-Threading





  1 core 2 cores 3 cores 4 cores
STALKER: Clear Sky ↑ 58 61 5% 60 -2% 60 0%
Devil May Cry 4 ↑ 189 203 7% 200 -1% 198 -1%
Far Cry 2 ↑ 28 50 79% 55 10% 64 16%
Grand Theft Auto 4 ↑ 24 58 142% 65 12% 66 2%
Lost Planet ↑ 43 43 0% 43 0% 43 0%
Unreal Tournament 3 ↑ 104 152 46% 161 6% 161 0%
Crysis: Warhead ↑ 45 56 24% 56 0% 56 0%
World in Conflict ↑ 37 45 22% 52 16% 55 6%
Group Score ↑ 82 110 34% 116 5% 119 3%

In case of Phenom II X4 we saw three leaders: Far Cry 2, World in Conflict and Unreal Tournament 3. As for now, there is only one leader -- Far Cry 2. Even performance of Grand Theft Auto 4 is much more unassuming -- performance gain from two cores in Phenom II X4 amounts to 312%, while Core i7 gains only 142%.

With Turbo Boost and Hyper-Threading





  2 cores 4 cores 6 cores 8 cores
STALKER: Clear Sky ↑ 60 61 2% 61 0% 61 0%
Devil May Cry 4 ↑ 199 199 0% 200 0% 196 -2%
Far Cry 2 ↑ 36 54 50% 60 11% 67 12%
Grand Theft Auto 4 ↑ 36 65 81% 66 2% 66 0%
Lost Planet ↑ 43 43 0% 43 0% 43 0%
Unreal Tournament 3 ↑ 95 148 56% 161 9% 166 3%
Crysis: Warhead ↑ 47 56 19% 55 -2% 56 2%
World in Conflict ↑ 29 51 76% 53 4% 53 0%
Group Score ↑ 87 114 31% 118 4% 120 2%

Turbo Boost and Hyper-Threading even things out: there are three leaders again, as in case of the AMD processor. By the way, our leaders are the same here.

Compared to AMD Phenom II X4



Alas, scalability of Core i7 is significantly worse than that of the top processor from AMD in games as well.


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