I5 750 vs. i7 920: The real power consumption diff

Tom's test shows that Core i5 750 + LGA1156 draws 60W less then Core i7 920 + LGA1366 at full load. Since the test is done during CPU full load, then I guess that the i7 is using all of it's virtual 8 cores during the test, while i5 is using only 4 cores.

This looks like a major power difference for pieces of hardware that do about the same performance in most cases. However, the big difference in performance is on applications that uses the i7 hyper-threading, in which case the 920 may be 20% faster then the 750.

Now, I've found some results that shows that an i7 920 based system uses 70W less power when running 4 threads comparing to 8 threads.

This means, that Core i5 750 + LGA1156 draws about the same power as Core i7 920 + LGA1366 and has about the same performance when running 4 or less threads. The 920 is using more power when running more then 4 threads, but then it delivers much better performance.
My conclusion is that power efficiency is not one of the reasons to choose i5 over i7. What do you think ?

Choosing LGA1156 vs LGA1366 is that X58 will get the i9s (hex core with 12 threads) while P55 will not.

I don't really care much for power consumption. At any rate, i7 (920,etc) is easier (as in no need to increase voltage much,etc) to OC according to a few reviews.

Below pretty much sums up what I am thinking:

http://www.anandtech.com/cpuchipse [...] i=3641&p=9

I do agree, the power consumption comparison should be between i7 920 and 860. However, those two processors are in different price scale. Most of the user will probably wonder between the 750 and 920.

Im pretty sure intel is going to release a low power 860s like they did with the 9550s soon.