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Page 1: Introduction, tests

Time:2018-02-13 17:29Turbochargers information Click:

Intel Core In detail i7

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Our today's article will be devoted to aspects not covered in the reviews of the Intel Core i7 architecture and its first representative Intel Core i7 920. Our readers might remember that we have evaluated performance of Core i7 920 in the nominal mode -- with enabled Turbo Boost and Hyper-Threading -- as it works in users' computers.

However, the urge to research is hard to suppress, so we wonder how much performance is added by new technologies used in these CPUs. In this review we shall analyze Core i7 performance in the "minimalistic" mode (without Turbo Boost and Hyper-Threading), with only Hyper-Threading enabled, and with only Turbo Boost enabled. And, of course, we'll compare the results to the nominal mode (both are enabled).

There are some changes in the testbed configuration: in this series of tests we use 6 GB of DDR3 SDRAM memory from Corsair and the ECS X58B-A motherboard. The other parts haven't changed since our previous Core i7 review. Unfortunately, judging by results, our usage of 6 GB of memory instead of 3 GB in the previous series of tests does not allow to compare them directly. So we re-tested the standard configuration with enabled Turbo Boost and Hyper-Threading with the new memory volume and motherboard.


Page 1: Introduction, tests


Testing

Legend:

All Disabled -- both Turbo Boost and Hyper-Threading are disabled.

TB Enabled -- only Turbo Boost is enabled.

HT Enabled -- only Hyper-Threading is enabled.

All Enabled -- both Turbo Boost and Hyper-Threading are enabled.

Gain, % -- performance gain of the mode in the previous column (to the left). The gain is relative to the "All Disabled" value.

Negative gains (performance drops) are marked red.

3D modeling and rendering
    All Disabled   TB Enabled   Gain, %   HT Enabled   Gain, %   All Enabled   Gain, %  
3ds max      
CPU Render   9.93   10.47   5%   11.11   12%   11.61   17%  
Graphics   4.26   4.35   2%   3.88   -9%   4.41   4%  
Hardware Shaders   10.38   10.82   4%   10.01   -4%   10.57   2%  
Maya      
GFX   2.83   2.89   2%   2.81   -1%   2.89   2%  
CPU   7.70   7.90   3%   7.73   0%   8.18   6%  
Render   0:04:58   0:04:41   6%   0:04:07   21%   0:03:55   27%  
Lightwave   0:07:28   0:06:59   7%   0:07:41   -3%   0:07:43   -3%  
Group Score   118   123   4%   120   2%   127   7%  

Turbo Boost naturally yields stable performance gains everywhere: according to its general concept, this function shouldn't lead to performance drops. The situation with Hyper-Threading is more complicated: it provides significant performance gains to rendering (3ds max, Maya), only Lightwave suffers from a small performance drop. It's symptomatic that Hyper-Threading leads to performance drops in graphics (3ds max, Maya). We may assume that the problem is in unoptimized video drivers, which also use processor's functions.

CAD/CAM
    All Disabled   TB Enabled   Gain, %   HT Enabled   Gain, %   All Enabled   Gain, %  
UGS NX      
Total CPU   3.97   4.09   3%   3.90   -2%   4.11   4%  
Total Graphics   1.95   1.97   1%   1.87   -4%   1.97   1%  
Pro/ENGINEER      
CPU Related tasks   569   529   8%   570   0%   535   6%  
Graphics Related tasks   769   743   3%   800   -4%   758   1%  
SolidWorks      
Graphics   80.33   71.78   12%   77.44   4%   69.13   16%  
CPU   44.17   41.52   6%   43.68   1%   40.88   8%  
Group Score   110   116   6%   109   -1%   116   6%  

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