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Originally Posted by Skybird
and a question I add to Neal's question. Some software simply does not make use of double core CPUs. FS9 for example does not recognize the second core, and runs with only one. My current single core CPU is a 3 GHz P4. Imagine I get a CPU double core at 2.66 GHz, does this mean then that the sim is running with 2.66 GHz single core and I need to expect it to run slower than on a P4 3 GHz, or do changes in CPU architecture compensate for that speed gap? Is a double core 2.66 running a software that uses only one core: slower, equally fast, or faster than a P4 3 GHz?
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A core2duo running at 2.66Ghz tramps all over a P4 3Ghz (for that matter a cd2 at 2 Ghz tramps all over a p4 at 3Ghz).
Don't think for a moment that the increase in performance is measured in 5-10%.
We're talking an increase of several 100%, thats how fast they are in single threaded performance, in multithread it goes even higher.
The c2d was a revolutionary increase in performance owing its success to a very aggressive pre-fectcher (and very big L2 inclusive cache) and a 25% increase in IPC.
Have a look at this comparison :
http://www.tomshardware.com/charts/c...Sam-2,390.html (you can also change the benchmark).
From that benchmark, an Intel Pentium 4 "E" 630 Prescott 3000 Mhz does 50 fps and an Intel Core 2 Duo E6400 2133 Mhz does 120 fps (and this is a pretty low end cpu for today's standard). 50->120 thats more than 100% increase in performance.