Which processor will perform fast ?

Question

A processor clocked at 3.0ghz (single core) vs 1.5gz (dual core)
if other things remains the same which will perform fast and which one consume more power ??

Answer 1

That will depend on the work load, among other things. Some things will run faster on a single 3Ghz if they're inherently single-threaded, others will perform better on 2 1.5Ghz if they have multiple threads running concurrently (as you can expect each core to spend less time context switching between threads - if there's 2 threads, then the single-core will have to context switch and the dual core won't at all. For 4 threads, the dual-core will spend half as much time context switching, and so on). There's also complicated issues having to do with exactly how the chip organizes the cache memory (shared or split between the 2 cores), and how that interacts with the programs that are running, and lots of other details.



This is part of why benchmarking supercomputers is such a pain in the butt.

Answer 2

Only an uneducated person can judge a processor by its clock speed only.

Number of cores, model and generation (newer technology) are far more important in the overall performance of a processor than GHz clock speed.



To answer your question, without knowing the exact models of the two processors it's hard to tell for sure, but in general the dual core would be faster.

My guess is that you are comparing a very old Pentium 4 @3.0GHz with a newer Celeron or Pentium dual core @1.5GHz, so the dual core would be better. Heck, even if the dual core is just an Intel Atom it would still be better than the P4.

Answer 3

The question is not that simple. Most 3GHz single core processors use older architecture and so even though they might be faster on paper in real life they are not. They are also usually less energy efficient, again because of older architecture.



Most dual core processors are more energy efficient and have much more L2 cache. The question about 1.5GHz ones is kind of a moot point as you can get something like a 3.2GHz i5 for almost the same money as slower CPUs.

Answer 4

Brand of processors were not in the question. Off hand single core pentium 4 lga 775 3.0 ghz presscott vs. 1.5ghz 9 series duel core lga 775 socket. under load the duel would have a very very slight short start like a quarter horse. The 3.0 would pull ahead because of the ghz vs. a duel core not a core 2 duo thus it is only a single file line of two processors one acting as a overdrive at 1.5ghz.

Answer 5

sophisticated task. lookup at bing and yahoo. this might help!