How CPU Features Affect CPU Performance, Part 5
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Video encoding
Without Turbo Boost and Hyper-Threading
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1 core |
2 cores |
3 cores |
4 cores |
| Canopus ProCoder ↓ |
03:43 |
03:14 |
15% |
03:09 |
3% |
03:09 |
0% |
| DivX ↓ |
06:08 |
04:33 |
35% |
03:58 |
15% |
03:37 |
10% |
| Mainconcept VC-1 ↓ |
15:45 |
09:08 |
72% |
07:04 |
29% |
05:49 |
21% |
| x264 ↓ |
27:11 |
15:13 |
79% |
11:36 |
31% |
07:43 |
50% |
| XviD ↓ |
05:05 |
03:33 |
43% |
03:10 |
12% |
02:37 |
21% |
| Group Score ↑ |
71 |
104 |
46% |
122 |
17% |
146 |
20% |
The alignment of forces even looks like the one with Phenom II X4, only the performance drop with three cores in x264 is a little more pronounced.
With Turbo Boost and Hyper-Threading
| |
2 cores |
4 cores |
6 cores |
8 cores |
| Canopus ProCoder ↓ |
03:34 |
03:06 |
15% |
03:15 |
-5% |
03:02 |
7% |
| DivX ↓ |
05:59 |
04:22 |
37% |
04:00 |
9% |
03:40 |
9% |
| Mainconcept VC-1 ↓ |
13:00 |
07:27 |
74% |
06:02 |
23% |
05:08 |
18% |
| x264 ↓ |
22:58 |
11:31 |
99% |
07:42 |
50% |
05:57 |
29% |
| XviD ↓ |
04:51 |
03:18 |
47% |
02:52 |
15% |
02:17 |
26% |
| Group Score ↑ |
78 |
118 |
51% |
139 |
18% |
163 |
17% |
TB and HT leveled the drop with three physical cores in x264, but it caused a performance drop in Canopus ProCoder. On the whole, the situation is very optimistic.
Compared to AMD Phenom II X4
One of the few (actually of only two) cases, when Core i7 a little outscores Phenom II X4 in scalability.
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