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Discussion on Article:
CPU Overclocking vs. Power Consumption

Started by: mschira | Date 04/13/10 02:27:58 AM

Comments: 11 | Last Comment: 04/18/10 04:09:20 AM

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very nice overview, really so much to find here!
Thanks so much for that!!!!

One thing I am missing is the Core i7-980X
That's a real downer.
M.

0 [Posted by: mschira Rating 19

| Date: 04/13/10 02:27:58 AM]

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It would be interesting to see the impact of temperature.
Some of the power consumption increase occurs because of a positive feedback mechanism - overclocking increases power consumption, which increases temperature, and higher temperatures increase power consumption, which increases temperature...
Sometimes you can significantly reduce the power usage of an overclocked processor by cooling it better - and this same trick does not work at stock clocks.

0 [Posted by: kaarlisk Rating 2

| Date: 04/13/10 02:49:38 AM]

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Nominal Vcore for a PHII x2 555 should read 1.35v not 1.4v unless thats what you set it to in the BIOS if left on Auto it should be closer to
1.34 ~ 1.36v @ stock clocks rising towards 1.4v with OCing

0 [Posted by: Athlonite Rating 25.58

| Date: 04/13/10 08:41:34 AM]

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I was disappointed to not see the Core i5 750 part of this roundup because it seems to be the most power efficient/value CPU on the market today. When I buy, it's what I plan to get. I was glad to see the i7 860 reviewed, though, as I now know not to get it even if the price between it and the 750 is equal.

I also didn't quite understand the w . h graphs. The lower score is better?

0 [Posted by: joefresco Rating 1

| Date: 04/13/10 08:58:15 AM]

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- collapse thread

Yes, lower is better. It basically measures the amount of power used to perform a task. Since slower performing processors take longer to complete a task they use more power to comlete the task. (instantanious consumtion X(times) the time needed to complete the task)

@5: If you look at the w/h graphs you will see that C2Q and the AIIX4 are actually the most power efficient processors. Did you read the article or do you commend out of what you already new?

@Ilya: Did you calculate the w/h over a period of time or only from the time it took to complete the task?

0 [Posted by: jonup Rating 127

| Date: 04/13/10 02:58:50 PM]

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Charts show the amount of electrical energy that was used to perform tasks only. Idle time is not taken into account, only calculations are.

0 [Posted by: Gavric

| Date: 04/13/10 05:07:06 PM]

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Thanks!

0 [Posted by: jonup Rating 127

| Date: 04/15/10 04:48:29 AM]

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The Core i5 750 should be very similar to the i7 870.
M.

0 [Posted by: mschira Rating 19

| Date: 04/13/10 04:21:57 PM]

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AMD CPU's make me cringe slower, hotter, and more power hungry compared to Intel clock for clock AMD is so fail it can't buy a bucket.

0 [Posted by: knowom Rating 53

| Date: 04/13/10 01:16:59 PM]

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Get a life.

0 [Posted by: bereft Rating 26.81

| Date: 04/16/10 12:11:17 PM]

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Hi,

thanks for the test, good idea

If you have time, please update the article with the upcoming AMD X6 Thuban processor. I am curious about the impact of Ultra Low K on overclocking

Thanks !

0 [Posted by: Bingle

| Date: 04/18/10 04:09:20 AM]

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