(04-17-2014, 01:26 PM)sum2012 Wrote: Anyway I have 8 core of amd cpu of cheaper than intel
cheaper in price... cheaper in performance too. 8 cores? nope you have 8 logical processors but the reality is much more like 4 cores (what they called modules) with 2 hardware threads per module. While the integer units may be done in parallel in hardware thread, it's not the case for float point units. besides, "if Windows were able to utilize an FX-8150's four modules first, and then backfill each module's second core, it'd maximize performance with up to four threads running concurrently." This is similar to what happens on Intel CPUs with HyperThreading – Windows 7 "schedules to physical cores before utilizing logical (HyperThreaded) cores." I was extremely disappointed that AMD is "lying" as much as Intel about the real number of truly parallel cores. If they had kept true cores as in Phenom II, I would have tolerated those cores might be less fast than Intel cores because they would have been monster kings in multi-threading thanks to 8 true cores.
Another hidden "lie", take Kaveri cpu. They told that we can mix APU cores with RADEON cores (Mantle). It's true ONLY for a mid-range RADEON card! one colleague bought a Kaveri and a high-range RADEON card and discovered his card was too powerful to be mixed with APU.
if you don't believe, just have a look at this link : http://www.extremetech.com/computing/100...erformance