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Intel Core 2 Duo E8500 3.16GHz 1333MHz FSB Processor Review

Intel Core 2 Duo E8500 3.16GHz 1333MHz FSB Processor Review - PCSTATS
Price Check: $/£/€
Abstract: The 3.16GHz Intel Core 2 Duo E8500 CPU is a dual-core chip based on the 45nm 'Wolfdale' core that falls into the upper end of family, supplanted only by the relatively expensive Core 2 Duo E8600.
 82% Rating:   
Filed under: CPU / Processors Published:  Author: 
External Mfg. Website: Intel May 12 2009   Max Page  
Home > Reviews > CPU / Processors > Intel Core 2 Duo E8500

CPU Power Consumption Tests

Gone are the days when performance benchmarks settled all Intel vs. AMD processor debates. Energy efficiency is in, and if electrical bills don't motivate you then reduced heat output and quieter cooling system will certainly make your head turn

Wading through the technical numbers to figure out the differences can be confusing because Intel and AMD report power values in slightly different ways. On paper AMD lists its processors maximum power TDP value, while Intel posts typical Thermal Design Power figures.

Obviously the two measurements of processor power consumption are not quite directly comparable, so to find out how processors stack up in the power efficiency department we need to measure how much power the computer draws while idle, then while in a CPU-stressed state.

To get a more accurate indication of what speeds the processors are currently running at, PCSTATS first disabled a bunch of AMD and Intel's power saving and CPU clock speed throttling technologies like Cool 'n' Quiet, EIST (speedstep) and C1E power states.

To simulate single-core load a program called Stress Prime (SP2004) is used. PCSTATS set about stressing each processor from one to all cores. This programs gives better insight into different power draw scenarios. The SP2004 program is multi-threaded, allowing individual CPU cores to be stressed by each instance of the program.

Total system power consumption was read with the Extech Power Analyzer Datalogger (model 380803) for both CPU loaded and CPU idle states. These values are measuring an entire system while the processor is running under computational load or idle.

The Extech Power Analyzer is located between the main 120AC supply and the PC's power supply. Given that motherboards vary across these test systems this is not a "true" measure of CPU power draw alone, but rather a measurement of the total computer system power draw, which we can compare for each specific platforms between the CPU idle and CPU stressed states.

Total System Idle Power Draw
Processor Total System Power Draw
Intel Pentium 4 540 150 Watts
Intel Pentium D 840 165 Watts
Intel Pentium D 940 168 Watts
Intel Core 2 Duo E6600 117 Watts
Intel Core 2 Duo E6750 123 Watts
Intel Core 2 Duo E8400 131 Watts
Intel Core 2 Duo E8500 114 Watts
Intel Core i7 920 144 Watts
AMD Sempron 3600+ 120 Watts
AMD Athlon64 4000+ 163 Watts
AMD Athlon64 FX-60 127 Watts
AMD Athlon64 X2 4800+ 143 Watts
AMD Athlon64 X2 5000+ 156 Watts
AMD Athlon64 FX-62 168 Watts
AMD Phenom II X3 720 155 Watts
AMD Phenom II X4 955 148 Watts

The Intel Core 2 Duo E8500 system has a slightly unfair advantage in the power draw test, since it's paired up with the more efficient Asus ENGTS250DK videocard, instead of the more power-hungry MSI 8800GTS 320MB.

Total System Stressed Power Draw - All Cores/Threads
Processor Total System Power Draw (All Cores)
Intel Pentium 4 540 223 Watts
Intel Pentium D 840 (2 Core ) 240 Watts
Intel Pentium D 940 (2 Core Load) 253 Watts
Intel Core 2 Duo E6600 (2 Core Load) 156 Watts
Intel Core 2 Duo E6750 (2 Core Load) 163 Watts
Intel Core 2 Duo E8400 (2 Core Load) 158 Watts
Intel Core 2 Duo E8500 (1 Core Load) 138 Watts
Intel Core 2 Duo E8500 (2 Core Load) 149 Watts
Intel Core i7 920 (8 Thread Load) 213 Watts
AMD Sempron 3600+ 148 Watts
AMD Athlon64 4000+ 172 Watts
AMD Athlon64 FX-60 (2 Core Load) 196 Watts
AMD Athlon64 X2 4800+ (2 Core Load) 173 Watts
AMD Athlon64 X2 5000+ (2 Core Load) 207 Watts
AMD Athlon64 FX-62 (2 Core Load) 235 Watts
AMD Phenom II X3 720 (3 Core Load) 213 Watts
AMD Phenom II X4 955 (4 Core Load) 236 Watts

With one processing core running at full load the system consumes 138W of power. The only systems that come close are the Intel Core 2 Duo E6600 and 65W AMD Sempron 3600+ processor. In comparison, an ancient Pentium D 940 CPU system pulls a mind-blowing 230W of power! As both cores are stressed by the Stress Prime application the Intel Core 2 Duo E8500 system increases to a power draw of 149W. Intel's renewed focus on energy-efficiency is really paying off here, the 45nm processors are really efficient!

Now to the fun stuff, 1333MHz FSB processor overclocking!

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Contents of Article: Intel Core 2 Duo E8500
 Pg 1.  Intel Core 2 Duo E8500 3.16GHz 1333MHz FSB Processor Review
 Pg 2.  — CPU Power Consumption Tests
 Pg 3.  Overclocking the Core 2 Duo E8500
 Pg 4.  32-bit CPU System Benchmarks: SYSMark 2007, PCMark Vantage
 Pg 5.  32-Bit CPU Synthetic Benchmarks: SiSoft Sandra Processor / Memory
 Pg 6.  32-Bit CPU Calculation Benchmarks: Super Pi, wPrime2.0, ScienceMark2, WinRAR
 Pg 7.  32-Bit CPU Rendering Benchmarks: Cinebench R10, Bibble 5, POV-Ray 3.7, SPECviewPerf 10
 Pg 8.  32-Bit CPU Synthetic Gaming Benchmarks: 3DMark Vantage, 3DMark 06
 Pg 9.  32-Bit CPU Gaming Benchmarks: Crysis, FEAR
 Pg 10.  Conclusions - E8500 CPU Worth the Trade Up?

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