by Nick N » Thu May 10, 2007 11:57 pm
The speed of the processor is the speed of all cores contained within its structure. If it is a dual core, both cores run equally fast. If quad, same. They are also calibrated to remain is sync with each other and to allow the OS to trim that timing as needed.
The difference lies in how large the L2 Cache is, how many there are and the how the cores use them. AMD and Intel use a different method for accessing the cache and sharing the data between the cores. AMD also incorporates the northbridge memory controller into the processor where Intel relies on the motherboard northbridge chipset for that.
Right now and until AMD releases its next generation of processor the Core2 Intel is a better dual core processor because of the lower latency (speed in which things happen internally) the processor has. Since the northbridge chip on the motherboard does some of the work for the Intel CPU as compared to AMD being directly on the processor, AMD tends to run hotter and requires higher voltage to run the processor, where with Intel the northbridge chip on the motherboard gets hot and the processor runs with a lower voltage.
When you are comparing speed of AMD and Intel prcessors (Im only speaking of comparing Core2 and A64) then you must understand that because of the different internal speeds, 2.6gig on AMD is actually slower than 2.6gig with Intel. Its not the frequency at which raw calculation takes place.. 2.6g is the same as 2.6g, but rather how much faster the Intel will allow raw calcualtion to occur without interruption (low-latency) and therefore it can take in a new problem and execute a final calculation faster than AMD running the same speed.
Because of how that works, a stock speed AMD x64 dual core 4800+ @ 2.4g in many ways runs slower than a stock speed Core2 1.8g. There are differences and there are areas the 1.8g Intel runs slower than the 4800+ but because of the overall response to instruction, the user may see an overall better response from the slower Core2 Intel. It also depends of what software is being used in how better or worse the two compare to each other. Overclocking the 4800+ can overcome the difference but as you overclock the core2, which tends to also clock higher by %,
Last edited by
Nick N on Fri May 11, 2007 12:51 am, edited 1 time in total.