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i5 vs i7


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Hi all,

 

I was looking at the new i5 750 specs, Im not an expert on this and just wanted to see if anyone here could explain what the numbers mean as compared to an i7 920, which has the same operating frequency, their sockets are different as well. the i5 is cheaper and ive read that its better than the i7 :confused:

 

http://www.newegg.com/Product/Product.aspx?Item=N82E16819115215&nm_mc=EMC-IGNEFL090809&cm_mmc=EMC-IGNEFL090809-_-Processor-_-LI1A-_-19115215

 

http://www.newegg.com/Product/Product.aspx?Item=N82E16819115202

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In the tomshardware.com tests the i5 750 and i7 920 were a bit of a toss up - in some things (like compressing a video) the i5 was faster but in others (like rendering the dragin in Max64) the i7 was faster. Not enough difference to make either a clear winner. Intel also has a new i7 that's pretty dan fast and uses the new motherboards so they sure did make things complicated, didn't they?

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The biggest difference is long-term investment at this point.

 

The X55 options are a great deal no matter which way you cut it in the here and now...but looking at the long-term you could build an X58 4 core i7 now, and plug in a Gulftown 6 core i9 in a year or so with the only additional investment being the processor itself.

 

From what I understand, the X55 chipset will never support more than 4 cores, although there should be another processor cycle in the X55's lifetime that will be somewhat faster and more energy efficient. But this still leaves you to do a complete rebuild if you want to make the jump to 6 or 8 cores once they are avaialble.

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considering that the 6-core Nehalem i7 replacements are expected to remain in the $1000+ range for many months after they ship, you might want to think hard about whether or not that cost will be worth it to You for about a 40%-45% speed increase* at best for rendering tasks. (most processes running on the 6-core CPU would be the same speed as a current i7 CPU)

 

*(my best guess, assuming clock speed is the same and using the current scaling linearlity curve of a modern raytracing engines such as mental ray or VRAY)

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After some more reading it does in fact appear that an i9 has little benefit outside of rendering or video encoding over an i7 or i5, and may end up performing slower in the single threaded processes that a workstation is tailored for. Also after further reading, I have found that the term for the new i5/i7 chipset is P55, not X55...oops :o

 

Also after putting together an i5 at newegg I was able to fit in some nice components(most notably a $300 64 GB Patriot Torqx SSD in place of a $150 Velociraptor) that I would have liked to include in my i7 build but could not afford on my budget and still at $200 less than my i7 build. The total build cost (microATX :cool:) was ~$960 US.

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  • 4 months later...

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