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Intel Core i7 920 Nehalem 2.66GHz Processor Review

Intel Core i7 920 Nehalem 2.66GHz Processor Review - PCSTATS
Abstract: If you're a computer enthusiast, you're likely already familiar with Intel's Core i7 processors, which have been widely hailed as the fastest desktop processors available on the market today. Introduced at the end of 2008, Intel's newest desktop processors are finally maturing and becoming more accessible in the market. It's time to take a look a fresh look at the Core i7 processor.
 95% Rating:   
Filed under: CPU / Processors Published:  Author: 
External Mfg. Website: Intel Aug 15 2009   Julian Apong  
Home > Reviews > CPU / Processors > Intel Core i7 920

32-Bit CPU Calculation Benchmarks: Super Pi, wPrime2.0

Super Pi Mod 1.5 Source: SuperPI

SuperPI calculates the number PI to 1 Million digits in this raw number crunching benchmark. The benchmark is fairly diverse and allows the user to change the number of digits of PI that can be calculated from 16 Thousand to 32 Million. The benchmark, which uses 19 iterations in the test, is set 1 Million digits.

Lower calculation times are better. SuperPi is not multi-threaded.

PCSTATS Benchmark ReportSuper Pi Mod 1.5 XS
1 Million Digits: (sec) Seconds Ranking
Intel Core i7 920 13.516
Intel Core 2 Duo E8500 14.8
Intel Core 2 Duo E8400 15.5
AMD Phenom II X4 955 Black Edition 21.699
AMD Phenom II X3 720 Black Edition (DDR2) 24.5
AMD Phenom II X3 720 Black Edition (DDR3) 24.398
AMD Phenom II X2 550 Black Edition 22.24
AMD Athlon II X2 250 25.865
8 Million Digits: (sec) Seconds Ranking
Intel Core i7 920 173.92
Intel Core 2 Duo E8500 190.538
Intel Core 2 Duo E8400 198
AMD Phenom II X4 955 Black Edition 269.615
AMD Phenom II X3 720 Black Edition (DDR3) 301.923
AMD Phenom II X2 550 Black Edition 275.19
AMD Athlon II X2 250 288.464
16 Million Digits: (sec) Seconds Ranking
Intel Core i7 920 384.78
Intel Core 2 Duo E8500 422.51
Intel Core 2 Duo E8400 426
AMD Phenom II X4 955 Black Edition 606.372
AMD Phenom II X3 720 Black Edition (DDR3) 671.513
AMD Phenom II X2 550 Black Edition 622.79
AMD Athlon II X2 250 637.423

Although it isn't multi-threaded, Super Pi still loves the Core i7 920 processor and Intel's instruction sets. The closest competition here is not from AMD's quad-core processor, but instead from Intel's own Core 2 Duo E8500

wPrime 2.0 Source: WPrime

wPrime uses a recursive call of Newton's method for estimating functions, with f(x)=x2-k, where k is the number we're sqrting, until Sgn(f(x)/f'(x)) does not equal that of the previous iteration, starting with an estimation of k/2. It then uses an iterative calling of the estimation method a set amount of times to increase the accuracy of the results. It then confirms that n(k)2=k to ensure the calculation was correct. It repeats this for all numbers from 1 to the requested maximum.

Lower calculation times are better. wPrime is multi-threaded.

PCSTATS Benchmark ReportwPrime 2.0
32 Million Digits (1 thread): (sec) Seconds Ranking
Intel Core i7 920 51.156
Intel Core 2 Duo E8500 50.466
Intel Core 2 Duo E8400 53.64
AMD Phenom II X4 955 Black Edition 45.115
AMD Phenom II X3 720 Black Edition (DDR2) 52.354
AMD Phenom II X3 720 Black Edition (DDR3) 51.901
AMD Phenom II X2 550 Black Edition 48.173
AMD Athlon II X2 250 49.827
32 Million Digits (2 thread): (sec) Seconds Ranking
Intel Core i7 920 25.828
Intel Core 2 Duo E8500 25.49
Intel Core 2 Duo E8400 27.078
AMD Phenom II X4 955 Black Edition 22.682
AMD Phenom II X3 720 Black Edition (DDR2) 26.537
AMD Phenom II X3 720 Black Edition (DDR3) 26.256
AMD Phenom II X2 550 Black Edition 24.242
AMD Athlon II X2 250 25.007
32 Million Digits (3 thread): (sec) Seconds Ranking
Intel Core i7 920 23.297
AMD Phenom II X4 955 Black Edition 15.46
AMD Phenom II X3 720 Black Edition (DDR2) 18.219
AMD Phenom II X3 720 Black Edition (DDR3) 17.936
32 Million Digits (4 thread): (sec) Seconds Ranking
Intel Core i7 920 13.954
AMD Phenom II X4 955 Black Edition 11.84
32 Million Digits (5 thread): (sec) Seconds Ranking
Intel Core i7 920 13.047
32 Million Digits (6 thread): (sec) Seconds Ranking
Intel Core i7 920 11.532
32 Million Digits (7 thread): (sec) Seconds Ranking
Intel Core i7 920 10.297
32 Million Digits (8 thread): (sec) Seconds Ranking
Intel Core i7 920 9.547
32 Million Digits (all thread): (sec) Seconds Ranking
Intel Core i7 920 9.547
Intel Core 2 Duo E8500 25.49
Intel Core 2 Duo E8400 27.078
AMD Phenom II X4 955 Black Edition 11.84
AMD Phenom II X3 720 Black Edition (DDR2) 18.219
AMD Phenom II X3 720 Black Edition (DDR3) 17.936
AMD Phenom II X2 550 Black Edition 24.242
AMD Athlon II X2 250 25.007


wPrime really shows what's capable with HyperThreading. While the Phenom II is actually a little more efficient core-for-core against the Core i7 920, being able to use the eight logical cores of the Core i7 920 through HyperThreading allows it to claim the fastest speed overall.

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Contents of Article: Intel Core i7 920
 Pg 1.  Intel Core i7 920 Nehalem 2.66GHz Processor Review
 Pg 2.  Intel Core i7 Technology
 Pg 3.  CPU Power Consumption Tests
 Pg 4.  Overclocking Nahalem - eight cores, new architecture
 Pg 5.  32-bit CPU System Benchmarks: SYSMark 2007, PCMark Vantage
 Pg 6.  32-Bit CPU Synthetic Benchmarks: SiSoft Sandra Processor & Memory
 Pg 7.  — 32-Bit CPU Calculation Benchmarks: Super Pi, wPrime2.0
 Pg 8.  32-Bit CPU Calculation Benchmarks: ScienceMark2.3, WinRAR
 Pg 9.  32-Bit CPU Rendering Benchmarks: Cinebench R10, Bibble 5
 Pg 10.  32-Bit CPU Rendering Benchmarks: POV-Ray, 3.7, SPECviewPerf 10
 Pg 11.  32-Bit CPU Synthetic Gaming Benchmarks: 3DMark Vantage, 3DMark 06
 Pg 12.  32-Bit CPU Gaming Benchmarks: Crysis, FEAR
 Pg 13.  lots of power, is it what you want?

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