Overclock
Select 2nd Gen Core family processors delimited with a ‘K’ in the product identification are unlocked meaning the multiplier can be adjusted to change the overall CPU speed. Basically CPU speed = CPU Ratio (or multiplier) times Base clock frequency (or BCLK). Although the BCLK is able to adjust -/+ 10% it is best practice to leave it at the default and specified 100MHz.
Benchmarks – Overclocked to 4.0Ghz
With the multiplier set at 40 and a base clock of 100Mhz means 40 x 100Mhz = 4000Mhz or 4.0Ghz. Turbo speed is now available up to 4.4Ghz to give even the overclock an extra boost if/when needed. The CPU averaged about 30C/84F doing basic word processing and web browsing. Now lets see how that 21% increase affects the benchmark results!
AIDA64 v1.50.1230
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| CPU Queen – 5th |
CPU PhotoWorxx – 1st |
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| CPU Zlib – 4th | CPU AES – 1st |
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| CPU Hash – 7th | |
In our AIDA64 benchmarks we find improvements in scores in all 5 tests. Results in the CPU ZLib and Hash test move the 2500K up in rank from 7th to 4th and 9th to 7th respectively. Only 23 points separate the 2500K and the Intel Core i7 Extreme 965 processor in the CPU Queen test.
PCMark Vantage x64
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| How the test was setup to run | Results – 19531 Marks; up from 17746 stock |
The 2500K overclock to 4.0GHz gains ~1800 Marks in the PCMark Vantage test suite showing that even this small overclock will squeeze extra juice from the 2nd Gen CPU.
PerformanceTest v7.0
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| PassMark Rating – 2988.3; up from 2635.9 stock |
CPU Rating – 8287.8; up from 7102 Stock |
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Detailed CPU comparison to i5 650, i5 760, and i7 920 The Core i5 2500K is in green Almost 1st in all categories, severely passing some! |
Comparison to the Stock 3.3GHz Performance |
Overall we see about 17% increase in performance indicated by the PerformanceTest suite, not bad for a 21% overclock.
SiSoftware Sandra 2011c
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| Processor Arithmetic | ||
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| Processor Multi-Media | ||
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| Multi-Core Efficiency | ||
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| Power Management Efficiency | ||
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| Cryptography | ||
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