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i5 vs i7 vs Q9450 - key differencies?

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Gecko_R7:

--- Quote from: Raistmer on 19 Sep 2009, 06:43:31 pm ---
--- Quote from: Gecko_R7 on 19 Sep 2009, 06:37:58 pm ---Q9550 has same 12MB L2 as Q9450, it's just another 1/2 step "up" on the multi, for 2.83 MHz.  ;)

--- End quote ---
I see. Maybe it mixed in my head with Q9400 or smth alike...  ::)  ::)  ::)

--- End quote ---

Ironically, the 9550 is actually priced @ 125 LESS in U.S. from reputable retailer vs. the 9450
For $209.99 (NewEgg), the 9550 w/ the slightly higher CPU frequency and larger/lower latency L2 "should" be at least as fast as i5 750 on Seti.
i5 does have a bit advantage re: memory x-fers.

Raistmer:

--- Quote from: Gecko_R7 on 19 Sep 2009, 06:54:25 pm ---i5 does have a bit advantage re: memory x-fers.

--- End quote ---
From DDR3 vs DDR2 memory solely?
Both Q* and i5 MBs will be dual channel, correct?

Gecko_R7:

--- Quote from: Raistmer on 19 Sep 2009, 07:12:03 pm ---
--- Quote from: Gecko_R7 on 19 Sep 2009, 06:54:25 pm ---i5 does have a bit advantage re: memory x-fers.

--- End quote ---
From DDR3 vs DDR2 memory solely?
Both Q* and i5 MBs will be dual channel, correct?


--- End quote ---

Yes, but i5 is Nehalem arch & using IMC whereas Q* uses FSB.

Jason G:
While the  couple of reviews that I've read were disappointed at the lack of HT in the i5-720 , the combined effect of the DDR3 internal memory controller giving ~50% better memory throughput over core2, and the turbo mode, seemed to bring  most benchmarks on roughly par with QX9770.  Sounds good, though the i7 860 & 870 apparently can outstrip the i7-920 for some things that are more CPU bound, which is way faster.   The same reviews tended to regard the 870 as overpriced, and the 860 as the next 'Sweet spot' processor, because they have HT etc. Part of the reasoning is that the LGA1156 main-boards will still apparently be fairly pricey.

I would hang out for the i7-860 if you can, we're probably going to self critical stride optimised MT FFTs over christmas, a year ahead of the Christmas 2010 schedule. 8 threads versus 4 might be a big deal for that style of programming, which is probably going to become much more common.

I bought a new Noctua cooler for the E8400, and was worried that I'd have to go and buy a new mounting kit for the new socket if I get one of those (or similar)  CPUs & main-boards next year, but it came with an extra little brown box sticky taped to the top, which contained brackets for both the new sockets.

Jason

MarkJ:

--- Quote from: Jason G on 20 Sep 2009, 04:04:41 am ---I would hang out for the i7-860 if you can, we're probably going to self critical stride optimised MT FFTs over christmas, a year ahead of the Christmas 2010 schedule. 8 threads versus 4 might be a big deal for that style of programming, which is probably going to become much more common.
--- End quote ---

Your going to what? I think that translates to "we're going to make a multithreaded app over christmas", but just wanted to clarify.

As for the Noctua coolers. I had a pair of them, threw them out 2 weeks ago as the machine I was building never worked. It even had the bag with all the different variety of mountings (AMD and Intel), although it was purchased before i7's came out. I could have posted them to ya!

Cheers

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