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Difference between i3, i5, i7 please? :)

post #1 of 17
1/7/10 at 11:13am
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Hi all, im not a computer nerd by any means, but ive just noticed i3 cpus for sale, i was wondering if anyone could tell me the simple differences between i3, i5, and i7 cpus, i. speeds, what they support such as hyperthreading, what socket they use, overclocking abilities, memory usage etc?

i might be doing a cheapish pc build in the future, wondering which cpu to go for....
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post #2 of 17
1/7/10 at 11:54am


I think the only thing missing is what is dual or triple channel, I may be wrong but I think all i7 is triple, and anything is is dual.

Looking for i3.



Be aware that some info could be out of date in these pics.
Edited by joemaniaci - 1/7/10 at 11:58am
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post #3 of 17
1/7/10 at 12:00pm
i3 is the same thing as i5 dual without turbo mode, except much cheaper. that chart actually has i3s on it, except they call them i5... i3 540 and 530.
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post #4 of 17
1/7/10 at 12:07pm
Quote:
Originally Posted by joemaniaci View Post


I think the only thing missing is what is dual or triple channel, I may be wrong but I think all i7 is triple, and anything is is dual.

Looking for i3.



Be aware that some info could be out of date in these pics.
only the x58 chips do triplle channel, p55 chips are dual channel. don't know much about the other stuff
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post #5 of 17
1/7/10 at 1:57pm
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so would a i3 be much better than an i5, or is turbo mode that important?
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post #6 of 17
1/7/10 at 1:59pm
i9 > i7 > i5 > i3
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post #7 of 17
1/7/10 at 2:00pm
Quote:
Originally Posted by $ilent View Post
so would a i3 be much better than an i5, or is turbo mode that important?
Honestly, if you want to save money ie; want integrated graphics etc get i3. If you want to game etc get an i5 750 Lynnfield quadcore. $200 for a dual core is just a waste imo.

Quote:
Originally Posted by portauthority View Post
i9 > i7 > i5 > i3
Sure but its not that simple, being that i7's and i5's cross into 2 different territories.
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post #8 of 17
1/7/10 at 2:02pm
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Quote:
Originally Posted by Jocelyn84 View Post
Honestly, if you want to save money ie; want integrated graphics etc get i3. If you want to game etc get an i5 750 Lynnfield quadcore. $200 for a dual core is just a waste imo.
i see...well my bro has an amd x2 3800+ dual core at 2ghz...so an i5 will feel like lightning compared, i think i will just go for the i5 750.
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post #9 of 17
1/7/10 at 2:04pm
Core i7: Quad core, hyperthreading, turbo
Core i5 750: Quad core, turbo, no hyperthreading
The other Core i5s: Dual core, hyperthreading, turbo, onboard IGP
Core i7: Dual core, hyperthreading, no turbo, onboard IGP

And the Pentium G6950 I believe is a dual core with turbo and an IGP, but without hyperthreading.


If you're just building an HTPC then the Pentium with an H55 motherboard is your best bet.

If you don't want a discrete video card then you should get a Core i3 with an H55.

If you're building a general purpose home PC then get the i5 750.

If you're going to be doing a lot of video editing or 3d modelling then you'll want a Core i7.

The dual core Core i5s are completely useless, unless you just want to overclock.
Edited by nathris - 1/7/10 at 2:07pm
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post #10 of 17
1/7/10 at 2:11pm
Quote:
Originally Posted by nathris View Post
The dual core Core i5s are completely useless, unless you just want to overclock.
seriously. i saw the new i5s released (i have the 750) and was almost angry at the higher speeds for almost the same price. but then i realized i have 4 cores while the new i5s have 2!
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