The new i5-580M processor

Apparently there is some difference between the system bus between this particular model and all the others in the i-family (4.8 GT/s vs. 2.5 GT/s ). Does any one have a clue why?
And do you think that it (2.66-3.33Mhz|3MB L3) will generate less heat/use less juice than the i7-620(2.66-3.33Mhz|4MB L3) and the i7-640(2.80-3.46Mhz|4MB L3), considering all three are part of the "new" 32nm line, have integrated GPUs and the only difference I can see is the system bus in the i5-580M?
Thank you in advance.

 

I was just about to post up a topic on this... Subd~

 

No idea. My guess is there's absolutely no difference between that CPU and others of the Arrandale lineup. They're the same as the previous i5/i7 with slightly higher frequencies / more aggressive turbo. Even the 640M which is the new top of the line says 2,5 GT/s on intel's specs so I'm inclined to think it's a mistake.

 

I will say the i5 580m should have slightly lower power from the fact it has 1MB less L3 cache, how much less power cant say for sure.

 

Cheers ;]
@botsu - I have double-checked with every possible source I could dig in and everywhere it states either 4800Mhz or 4.7GT/s ( vs 2500Mhz or 2.5GT/s ) but no explanation
@sean473 - IMO as well, especially when the price is ~the same and all the benchmarks show it's btwn 2 and 8% faster than 620M, depending on the task nature ( in a few it even ouperforms i7-640M, no clue why ).
The issue is whether it generates more heat/uses more battery. I got my eyes on the HP Envy 17 and I read the out of all the forums I stumbled upon and it seems the only issues worth mentioning are heat and battery. Just wondering if those can be (not fixed but) helped with trowin' in a i5-580M in the bundle. Otherwise I'm just gonna go with the i7-640 option.

 

I've got my eyes on an Envy 14 and am thinking of going with the 580M over an i7. My number one concern is when shopping for a laptop is heat. Any ideas which will run at cooler temps... an i5-580M or i7-720QM?

 

i5-580M is made in 32nm, whereas i7-720QM is made in 45nm, it has double number of cores and double the size of cache. In my machine it goes up to 80C. I am absolutely sure, that the i5 would run much, much cooler.

 

580m and 640m are about the same price on ebay... so I'd go for the 640m if this is an upgrade.

 

Depends on cooling. My i5 crosses the 90C mark very easily, though that's most likely due to poorly applied thermal paste. Either way, while it would probably run cooler than that in your machine, in many others it may run close to that.

 

There is no difference. Compare Intel Core i7-620M, i7-640M, i5-540M, i5-580M

I doubt it. I would choose the i5-580M to bring cost down.