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[Solved] Some questions on new cpu's and GPU performance

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Best answer from seabreeze.

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jos de trol   09-16-2009 at 01:56:41 PM

Hi guys. Anyone know when we will see the new i5 and i7 (1556 socket) cpu's appear on the tom's hardware charts? I've seen reviews left and right but I'm not getting a very clear picture and would like to check all those benchmark graphs on this site :(

also anyone know how significant the power efficiency is between the new processors (especially the 860) and the old i7 line? like how much kilowatt you would save on average per hour? I've seen charts with the power use but have no idea how to calculate such an average use per hour from those. This would seriously affect my view of the new processor... because as I understand it there's not a lot of difference in performance between a 920 overclocked to the 860 level and a 860 proper...

finally I've been hearing conflicting news on the importance of the x16 vs. x8 pcie because on the one hand I'm hearing you wouldn't even fully use the x8 capacity with current video cards in sli or crossfire but on the otherhand I've also read a review (on bit tech I believe) concluding that there is a significant performance difference even with current video cards!


Message edited by jos de trol on 09-16-2009 at 01:59:19 PM
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Best answer from seabreeze
Where's the i7-920 power comsumption results?

When i7-860 is selected and viewed, the power consumption is the last two charts. When i7 920 is selected, Crysis Warhead is the last chart. No idle or load charts listed.

Idle Power Consumption lists only 750, 860 and 870 for Intel.
Load Power Consumption lists the same. No 920 in the list.

The 750, 860 and 870 are all 95W and the results from that link of Total System Power Consumption (Under Load) are 184W, 180W and 181W, respectively, but without a 920 result, we can't make a comparison.

Another link for the i7-920:
http://www.guru3d.com/article/intel-core-i7-920-and-965-review/18
shows i7-920 system watts at full load of 264W.

From the same site for the i5-860:
http://www.guru3d.com/article/core-i5-750-core-i7-860-870-processor-review-test/9
shows i7-860 system watts at full load of 160W.

So there you have 104W difference in total system watts which is far greater than just the difference between the TDP's of each processor I initially pointed out. Almost three times greater. The extra on the power bill goes from $25.00 to $75.00 per year if under 100% load, 10 hours per day, 365 days per year.

Difference in idle is 25W, so if both machines only idle all year long (3,650hr) the 920 would cost about $18.00 more to run than the 860, based on $0.20/kWhr.

Reality check: for most people the dollar cost difference between the two will probably be loose change.
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seabreeze   09-18-2009 at 12:37:20 AM

860/920 TDP's are 95W/130W, respectivley. That's 35W difference when both are running full at load. Over one hour of use this is 35Whr of power, or 0.035kWhr, or 3.5% of a kilowatt-hour.

Our utility charges about $0.20 per kWhr, so the difference between the two will amount to $0.007 per hour. 10 hours per day, 365 days per year and that's $25.55 saving on the electricity bill in favour of the 860.

Reply to seabreeze
PsychoSaysDie   09-18-2009 at 12:45:44 AM

Here :)

http://www.anandtech.com/bench/def [...] 109&p2=102

------------------------------ Core I7 920 D0 @ 4.2Ghz
MSI X58 Pro-E
32GB SSD, WD Blacks In R0
Sapphire HD 5870's In XFire
 Reply to PsychoSaysDie
seabreeze   09-19-2009 at 08:10:58 AM
Best answer

Where's the i7-920 power comsumption results?

When i7-860 is selected and viewed, the power consumption is the last two charts. When i7 920 is selected, Crysis Warhead is the last chart. No idle or load charts listed.

Idle Power Consumption lists only 750, 860 and 870 for Intel.
Load Power Consumption lists the same. No 920 in the list.

The 750, 860 and 870 are all 95W and the results from that link of Total System Power Consumption (Under Load) are 184W, 180W and 181W, respectively, but without a 920 result, we can't make a comparison.

Another link for the i7-920:
http://www.guru3d.com/article/intel-core-i7-920-and-965-review/18
shows i7-920 system watts at full load of 264W.

From the same site for the i5-860:
http://www.guru3d.com/article/core-i5-750-core-i7-860-870-processor-review-test/9
shows i7-860 system watts at full load of 160W.

So there you have 104W difference in total system watts which is far greater than just the difference between the TDP's of each processor I initially pointed out. Almost three times greater. The extra on the power bill goes from $25.00 to $75.00 per year if under 100% load, 10 hours per day, 365 days per year.

Difference in idle is 25W, so if both machines only idle all year long (3,650hr) the 920 would cost about $18.00 more to run than the 860, based on $0.20/kWhr.

Reality check: for most people the dollar cost difference between the two will probably be loose change.


Message edited by seabreeze on 09-19-2009 at 08:38:12 AM
Reply to seabreeze
jos de trol   10-09-2009 at 08:52:32 AM

thanks for the very clear and informative reply!

Reply to jos de trol
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