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Does CPU performance is affected by the clock speed and the cache size and the transfer speed of the front bus?
Wiki User
∙ 13y ago
Yes, very much.
The length that light/electricity travel at a clock frequency of 1GHz is around a foot - 34cm. So, at 2GHz, no wires must be longer than around 16 cm, to be in the same clock cycle - not the next. Well, to be on the safe side, halve of that.
The Intel instruction set is made so that it requires 1, 3 or 5 clock cycles. Now the memory is usually more than 8cm away from the CPU, so this runs much slower, say 250ns access time or 1/10 of the clock frequency of the CPU.
So, the the cache is held on the microprocessor chip, allowing this to run on "full speed" - 10 times faster. If the cache is on a chip on the side - "Level 2 cache" it may run at half the speed of the CPU.
All instructions that makes changes to the memory will execute "Write through cache" so that the main memory is updated. If the next instruction will also modify memory, the previous write must complete - using 1, 3 or 5 cycles - or up to 50 instructions delays.
The simplest is to modify the code to minimise memory write-back, or allow this to proceed in parallel - "interleaved".
The amount of data that is written may also be reduced to allow better usage of the bus. 64 bit instruction will inevitably take longer time to execute and store the result in memory than a 32 bit instruction.
Wiki User
∙ 13y ago
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Which factors will least affect the performance of the CPU?
The performance of a CPU is least affected by its age, its size and weight. Performance is instead determined by model, clock speed and size of cache.
What does a fast clock do to the performance of the CPU?
Increasing the clock-speed of a processor increases its performance. There is so much more that goes into the overall performance of a processor (cache speed, cache size, hit / miss frequency on L1 and L2 cache, cycle recovery time on the cache, architecture, core efficiency, pipeline length, and northbridge frequency just to name a few) However, simply increasing a processor's clock speed WILL improve its performance, to an extent. Fast clock speeds send more calculations through the processor cores more frequently, thus leading to your increased performance. If it is pushed too high, a processor begins to see diminishing returns as more cache misses, overheating, and voltage inefficiency start setting in. Always consider properly researching this matter before considering raising the clock speed of your processor.
The CPU clock speed determines the performance of the CPU?
Not really, if you have a cpu with 1 core and 3ghz vs a multi core with 2.6ghz, the multi core is much better, it can handle more stuff and do it quicker, more cache also helps determine performance.
Does the CPU clock speed determines the performance of the CPU?
Not really, if you have a cpu with 1 core and 3ghz vs a multi core with 2.6ghz, the multi core is much better, it can handle more stuff and do it quicker, more cache also helps determine performance.
What is the operating speed of a Celeron processor in a Acer Extensa laptop?
The Acer Extensa laptop comes from the manufacturer with a Celeron M 550 processor in it. While it is by no means the fastest processor, it does clock in at 2 GHz clock speed and 1024 KB of level 2 cache performance.
What are the factors affecting CPU performance?
There are many factors. 1. Clock frequency 2. Memory bandwidth 3. L2/L3 cache size 4. Instruction per cycle 5. number of CPU cores.
Can temperature extremes make a clock inaccurate?
Temperature extremes can effect the performance of a clock.
What can improve CPU performance the most?
A faster internal clock speed will improve the performance of the CPU.
Why do you need to run a benchmark test?
a benchmark test for a computer is a system of tests designed to push your system to the limit. it then gives you a rating of system performance, such as clock speeds, FPS, and data transfer rates
What memory technology achieves better performance by using both the rising and falling of the clock?
Hyper-Threading achieves better performance by using both the rising and falling of the clock.
Why is the CPU clock speed not always a reliable indicator of performance?
There are many other elements to take on account when related to performance indicator. Besides hardwares it is necessary to configure properly the entire system. (BIOS, memory management, automatic defragmentation, cleaning, and so on.) Adding to this, it is also important to note that a poorly performing processor will not simply become a stellar piece of equipment when its clock speed is increased. You will get diminishing returns on clock speed increases beyond a particular point due to increased L1 cache misses, overheating, and other inefficiencies.
What is the energy transfer for alarm clock?
Mechanical to sound to radiant
