so does the i7 really support 8hyper threads?

Now that it's out, does the i7 really support 8 Hyperthreading? from 4 cores?

 

Yes, two threads per core. Not two times the performance, but there is an increase in performance.

 

With regard to the Ultra Low Voltage i7 in the M11X R2, its a dual core with Hyperthreading per core, not a 4 core processor like the desktop i7's.

 

Like he said, 2 cores, 4 threads.

 

Oh, so that means the i7 supports 8HT (2cores, 4ht Per core) and the i5 is only (2cores,2HT per cores). Doesn't sound right. Doesn't the desktop i7 can only do 2HT per core? How does the i7 in the X11 do 4HT per core?

So besides a a minor drop in battery life, its better to choose the i7 then.

 

To calrify I meant the i7 640um has 2 cores x 2 threads per core = 4 threads total. So does the i5 520um. The faster i7s have 4 cores for a total of 8 threads. Here is a link to the spec's on the i7 640um Intel® Core? i7-640UM Processor (4M Cache, 1.20 GHz) with SPEC Code(s) SLBMM

Basically the i7 has a faster clock speed and 4mb cache instead of 3mb in the i5.

 

K, so then Alienware is wrong in saying that the version of i7 in the 11x has 8HT. Shoot. I was hoping that would've been true by the time the people got the laptops.

 

Bad question: How does this new i7-640um (1.2 GHZ with 2.266GHZ ) for the M11x R2 compare to the i7-620M (2.66 GHz with 3.33Ghz) on a larger laptop?
Besides the fact that it is a ULV, is it that much slower? Why are the Clock speeds so different?


I guess what will I expect to not be able to do with the new i7 for the m11x?

 

I assume you are talking about the message that appears here when you are confiuring the m11x with the i7. Notice it says supports 8 way OR 4 way multitasking. I'm guessing that is just generic info about all i7 processors not necessarily the 640 um specifically.

 

This confused me as well when you select your processor. The only reason it says "4 or 8" is because there are dual-and-quad i7s, and there isn't a special-snowflake version of that little product brief just for the M11x customization page.

It's four threads.

 

You can do anything, only slower than a not ULV i7 . So if you're not into nuclear simulation you're ok
If you looks into the numbers on cpu benchmark u can notice that the entry i5 ulv processor works (without overclock) like a core 2 duo P7550 used on macbooks and other notebooks.

PassMark Software - CPU Benchmarks - List of Benchmarked CPUs

Intel Core i5 U 520 @ 1.07GHz 1611
Intel Core2 Duo P7550 @ 2.26GHz 1649

and the "old" su7300
Intel SU7300 @ 1.30GHz 980

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