Hi
I just noticed my mobo can use a 45nm quad core but what do I gain by upgrading to the 45nm core.
Bye Paul

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the 45nm core2s and quads run cooler and have the SSE4 instruction set.
they will crunch faster and cooler in other words.

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You'll save electricity, and hence money, if you use a 45nm core, but probably not enough to pay the whole cost of the CPU. If you're starting from scratch, and making the choice for the first time, go 45nm: but if you already have a 65nm chip with enough cores, it's probably not worth upgrading.

the 45nm core2s and quads run cooler and have the SSE4 instruction set.
they will crunch faster and cooler in other words.

Sounds good to me

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but what would the change in rac be, can someone estimate?

I just built a Q9550 and it is overclocked to 3.86gig. With a water based cooling system and it crunchs an AP work unit in 23 hours. Now you may not overclock at all or not as high but the performance of the Quad 45nm is really great.

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It probably goes something like this: With 45 nanometers and everything else the same, less heat will be generated than with 65 nanometers. Therefore you can overclock the 45 more with same or less cooling required. Also the improved instruction set of the 45 may allow faster computation, everything else being the same. I just said in my own way what Phud, Richard Haselgrove and HFB1217 had already said.

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It probably goes something like this: With 45 nanometers and everything else the same, less heat will be generated than with 65 nanometers. Therefore you can overclock the 45 more with same or less cooling required. Also the improved instruction set of the 45 may allow faster computation, everything else being the same. I just said in my own way what Phud, Richard Haselgrove and HFB1217 had already said.

45nm are a bit cooler here by 10C than the equivalent overclocked 65nm, But as faster I have no idea as the 45nm(Q9300 M1) here does a lot more stuff than the 65nm cruncher(QX6700 B1(ES)), Even though both cpus are running flat out @ 3.51GHz on air 24/7 @ 100% load each. I guess I'm getting My moneys worth out of these 2 cpus. :D

Oh and I've been Elmered by the Phud. :D

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The T1 Trust, PRR T1 Class 4-4-4-4 #5550, 1 of America's First HST's

I saw someone post a while ago who ran a Penny (45nM) on air at 4.0GHz. Their settled RAC, using the AK optimised SSE4.1 client, was 8,750.

I think there is several advantages over the 65nM quad designs -

1. Run cooler;
2. Use less electricity at the same clock;
3. Is about 20% more efficient at crunching, hence higher RAC in the same time;
4. Can be clocked to a higher level, depending on the MoBo and memory. This can give another 15% on RAC.

The 65nM Quads clock to between 3.1GHz and 3.5GHz while remaining stable on air. Their RAC settled at about 5,500 when using the AK SSSE3x client.

also, quaddies on the 45nm dies start at 2.5 Ghz stock clocking, as opposed to 2.4 Ghz on the 65nm die...

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Hello, from Albany, CA!...

also, quaddies on the 45nm dies start at 2.5 Ghz stock clocking, as opposed to 2.4 Ghz on the 65nm die...

Nope, 45nm start at 2.33 - Q8200

-Dave

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also, quaddies on the 45nm dies start at 2.5 Ghz stock clocking, as opposed to 2.4 Ghz on the 65nm die...

Nope, 45nm start at 2.33 - Q8200

-Dave

missed that one... it's (almost - streeted the first of the month) brand new...

Note that the Q8200 has 4 Mb cache, whereas the 9000 series all have 6 Mb cache...

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Hello, from Albany, CA!...

also, quaddies on the 45nm dies start at 2.5 Ghz stock clocking, as opposed to 2.4 GHz on the 65nm die...

Nope, 45nm start at 2.33 - Q8200

-Dave

missed that one... it's (almost - streeted the first of the month) brand new...

Note that the Q8200 has 4 Mb cache, whereas the 9000 series all have 6 Mb cache...

I think that except for the older 9000's, Some have 12MB of cache(Q9450, Q9550, QX9650, QX9770, QX9775).

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The T1 Trust, PRR T1 Class 4-4-4-4 #5550, 1 of America's First HST's