Intel Core 2 Quad Q8400 CPU Review - HotHardware

Intel Core 2 Quad Q8400 CPU Review

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The Q8400 operates at 2.66GHz with a 333MHz front side bus speed. It is manufactured using Intel's 45nm process technology and has a 95W thermal design power (TDP). The CPU can operate using core ratios from 6 to 8 and has 4MB of L2 cache.  


Intel Core 2 Quad Q8400 Top & Bottom

Intel's Q8400 fills the $180 price point in Intel's line up that competes directly with AMD's Phenom II X4 940 BE processor. But the Q8400 has a tough fight on its hands as the X4 940 BE runs at 3GHz and offers an unlocked multiplier.   


  
Intel Core 2 Quad Q8400 CPU-Z Details

CPU-Z reveals the processor's details and settings. Note the 4MB (2MB x 2) L2 cache shown above. This is the only difference between this processor and the more expensive 2.66GHz Q9400, which has 6MB of L2 cache. We will show you the performance difference between the two chips later on in this review.    

Overclocking The Intel Core 2 Quad Q8400
Pedal To The Metal



Intel Core 2 Quad Q8400 Overclocked to 3.92GHz

We love free upgrades. One of the best ways to get more performance from your PC is to overclock the processor. From a stock frequency of 2.66GHz, we overclocked the Q8400 to an impressive 3.92GHz using a TRUE 120 and 1.36V. We started with a 333MHz FSB and raised it slowly while testing for stability along the way. It wasn't until we passed 490MHz FSB that we ran into any issues so we backed it back down and settled for the 3.92GHz overclock. We would like to note that we stayed within Intel's recommended operating voltage (0.85V - 1.3625V) to achieve this overclock. With higher voltages and more powerful cooling, even higher frequencies are likely possible.  

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I didn't think that it would beat most, if not all of the Phenom II's, however I was caught off guard by the fact that the intel chips don't do as well in the media areas as the AMD chips...

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Thanks for sharing such information here. It is nice to know that Intel Core2Quad processor prices are coming down rapidly. I have recently invested in couple of refurbished gaming laptops and I am not sure if I would be able to replace Core2Duo processors installed in them with Core2Quad and don't want to take any risks further as already premium laptop video cards have cost me dear.

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I agree, and I think Intel might have got ahead of itself a little in technology and actually priced out the consumer.  That has to be the reason for the release of the Core 2 quad 8400

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@ that price point I wonder if a Phenom 2 905e 65W CPU would be better or not?

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Definitely Phenom 2 905e 65W CPU seems to be better option but what do you like the best about it?

Regards,

ServicedotZtronics,

Ztronics

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gamemaniac:

Definitely Phenom 2 905e 65W CPU seems to be better option but what do you like the best about it?

Regards,

ServicedotZtronics,

Ztronics

For me its simply the low power consumption, 65W and quad core combination. i mean Intel has a low power quad core solution but its close to $100 more.

 

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Couple things:

1. Did they OC and then undo it for the testing? or did they run the tests @ 3.9 Ghz????

2. If your PC is on all the time like mine, the $100 extra for a 65w version pays for it self in I think approx 1.5 years (30w delta @ 24 cents per kwh)

 

 

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