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1 core = 2 threads and 6 cores = 12 threads but!!!

post #1 of 49
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Hey guys.
I currently run a P4 3.2 ghz cpu thats a single core but dual thread.
My new cpu will also be 3.2 ghz but with 6 cores and 12 threads.

Does this mean that the new cpu will be 6 times faster at the same exact clock speed of 3.2 ghz?
Or am i not understanding correctly how cores work vs processing speed?

thanks
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post #2 of 49
6 times faster for anything that can utilize the additional threads yes, for everything else, no, it will be the same speed.
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post #3 of 49
Hey mate.

Clock speed alone is not the defining factor of CPU's. Each generations architecture improves, adds features, and expands. A single core Pentium 4 @ 3.4ghz will get creamed in performance by a single core Ivy Bridge (latest Gen) at 1.7ghz (most likely, perhaps depending on situation, my point is made however)

The good thing to know is that ANY 6 core, 12 thread CPU you could possibly be purchasing is an intel i7 (either a 980x/990x or 3930k/3960x) and all of these CPU's are really high end and extremely fast in comparison to your old CPU in every way.

Taking an individual core from your new CPU at 3.2ghz, it will still be a large margin increase faster, I would estimate at about a 200% increase. Not only are there increases in speed associated with this new hardware (compared to your much older generation CPU), but these high end CPU's you are getting have much larger cache's and so forth, plus all the new instructions, newer motherboard platforms which require and take advantage of much higher RAM bandwidth and increased system bus speed, not to mention probably increases as a result of SSD's and so forth.

The new CPU will utterly crush your old rig at absolutely everything, period. And if the task you are performing can make use of all 12 threads, then I would estimate that your new rig will be closer to 15 times faster. Think of 6 of your current CPU's running at 2-3 times faster than now. Like 8ghz? haha. ... seriously, the difference will be laughable. You will literally laugh out loud.
Edited by willibj - 10/22/12 at 5:49pm
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post #4 of 49
Quote:
Originally Posted by navynuke499 View Post

6 times faster for anything that can utilize the additional threads yes, for everything else, no, it will be the same speed.

Sorry, but this is completely incorrect. See above.
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post #5 of 49
Nope, the current architecture is leaps and bounds ahead of a P4. Sandy bridge or Sandy Bridge E is about 3x faster clock for clock.
post #6 of 49
the pentium 4 architecture is much slower than newer sandy bridge and ivy bridge architectures. you could have a single core P4 and a single core SB or IB at the same speeds, and the SB and IB would be significantly faster. may i ask though, what you need all of those threads for?
post #7 of 49
A new chip is going to be faster for a lot of reasons, but it won't be six times faster.

The instruction sets for multicore CPU's are different and further optimized then those of older CPUs.

The addition of a L3 cache or the increase in size of an L3 cache means that the CPU will be able to quickly access things that aren't stored in the lower level caches.

The increase in FSB speed capabilities means quicker access to data stored in the systems RAM.

depending on the age of the CPU, it could be six times faster, but it won't be strictly because you have more CPU cores.
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post #8 of 49
Your probably right, for the wrong reasons lol (OP)

Things to consider are things like the popular term "IPC" as well as chipset (how the cpu communicates to everything).
    
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post #9 of 49
yes !it means you could run say 6wow game at same speed as your p4.but they would be about samefps as p4(just a non sense exemple)its like a highway ,10 lane is better only if all can be used at the same time.it was tested past 4core with hyperthreading?you better have quad hd because not much demand better then non extreme
post #10 of 49
ok, so there two things about speed:

single core speed, and
multithreaded speed

single core speed is judged by two things: clock speed and IPC. you could say speed=IPC times clock speed

multithreaded speed is single core speed x number of cores (assuming normal core desings like intels, bulldozer complacats things)

your new cpu has the same clock speed but much higher IPC, so it is much faster single threaded, then take that faster and multiple that by six, and then some as HT has improved
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