Dominant frequency and computing power
Publish: 2021-03-26 12:18:05
1. There are many computing power
among them, floating-point computing is one of them
floating-point computing power has a lot to do with the first level cache
for example,
amd
CPU's floating-point computing power is much higher than inter
dominant frequency is a very important point, but not all
if dominant frequency decides everything, AMD will declare bankruptcy
but Inter is afraid of AMD
amd 2600 + uses super -- pi to measure The result of the test is comparable to the speed of p43.0, but the main frequency of 2600 + is only 1.8g
but the CPU of the same architecture and cache is determined by the main frequency
it can tell you an undeniable fact that the CPU of
p3-866
is faster than that of P4 Celeron 1.8g
among them, floating-point computing is one of them
floating-point computing power has a lot to do with the first level cache
for example,
amd
CPU's floating-point computing power is much higher than inter
dominant frequency is a very important point, but not all
if dominant frequency decides everything, AMD will declare bankruptcy
but Inter is afraid of AMD
amd 2600 + uses super -- pi to measure The result of the test is comparable to the speed of p43.0, but the main frequency of 2600 + is only 1.8g
but the CPU of the same architecture and cache is determined by the main frequency
it can tell you an undeniable fact that the CPU of
p3-866
is faster than that of P4 Celeron 1.8g
2.
7850 or above, the number of video card stream processors x, frequency and speed are directly proportional
for example, the 7850 and 280x also run at 1000MHz, and the speed of 280x is twice that of 7850
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3. CPU has main frequency. External frequency. Front end bus and other parameters CPU bandwidth is: front end bus X8, 1.7 bus should be 400MHz, that is 400x8 = 3200mb = 3.2GB memory bandwidth is: working frequency x8667 represents the working frequency of the memory, bandwidth is 667x8 = 5336 = 5.3gb, if the internal bandwidth is lower than the CPU bandwidth, it will not play the best performance of the CPU, but equal to or higher than the CPU, There is no bottleneck. The memory in the computer is equivalent to a temporary storage platform. If the channel for the CPU to get data is narrow, the CPU will be slow to get data. 1.7 CPU uses DDR2 667 memory, which is enough. As for what you said "memory is added to 1.5g", you misunderstood that 667 is the working frequency of memory, 1.5g is the memory capacity, and the same 667 frequency can be divided into 512MB and 1GB, It's enough for you to use 512MB, but the price difference between 512MB and 1GB is very close. You can decide how much you want to buy.
hope to adopt it
hope to adopt it
4. You can buy many platforms. Recommend EBIT if you don't go over the wall
5. The main frequency of CPU is directly related to the computing power of CPU, but the more important is the architecture of CPU. For example, the former netbus architecture 3G is not as good as the present core architecture E5200
6. The main frequency of CPU is the clock frequency of CPU core (CPU
clock
speed). Generally speaking, the number of megahertz of so and so CPU, and this number of megahertz is "the main frequency of CPU". Many people think that the main frequency of CPU is its running speed, but it is not. The main frequency of CPU indicates the speed of digital pulse signal oscillation in CPU, which is not directly related to the actual computing power of CPU. There is a certain relationship between the main frequency and the actual operation speed, but at present there is no definite formula to quantify the numerical relationship between them, because the operation speed of CPU depends on all aspects of the performance indicators of the CPU pipeline (cache, instruction set, CPU bits, etc.). Because the main frequency does not directly represent the operation speed, so in some cases, the actual operation speed of CPU with higher main frequency is lower. For example, most of the Athlon XP series CPUs of AMD company have lower dominant frequency, reaching the performance of the Pentium
4 series CPUs of Intel company with higher dominant frequency. Therefore, Athlon XP series CPUs are named by PR value. Therefore, the dominant frequency is only one aspect of CPU performance, and does not represent the overall performance of CPU
clock
speed). Generally speaking, the number of megahertz of so and so CPU, and this number of megahertz is "the main frequency of CPU". Many people think that the main frequency of CPU is its running speed, but it is not. The main frequency of CPU indicates the speed of digital pulse signal oscillation in CPU, which is not directly related to the actual computing power of CPU. There is a certain relationship between the main frequency and the actual operation speed, but at present there is no definite formula to quantify the numerical relationship between them, because the operation speed of CPU depends on all aspects of the performance indicators of the CPU pipeline (cache, instruction set, CPU bits, etc.). Because the main frequency does not directly represent the operation speed, so in some cases, the actual operation speed of CPU with higher main frequency is lower. For example, most of the Athlon XP series CPUs of AMD company have lower dominant frequency, reaching the performance of the Pentium
4 series CPUs of Intel company with higher dominant frequency. Therefore, Athlon XP series CPUs are named by PR value. Therefore, the dominant frequency is only one aspect of CPU performance, and does not represent the overall performance of CPU
7. The main frequency of CPU determines its maximum computing power per second, that is, its computing speed
some CPUs have two levels of flash memory. The speed of data exchange between flash memory and CPU is very close to that of CPU itself
in general, the data exchange between memory and CPU is one or two orders of magnitude lower than the computing speed of CPU itself (depending on which bus the computer uses), which is the biggest bottleneck affecting the overall computing speed of a computer
so your question is not completely correct. The relationship between the overall computing power and memory size of the computer and the relationship between the overall computing power of the computer and the data exchange speed of the bus are secondary
only when the bus speed is constant and the size of memory is not less than the maximum number of bytes that can be exchanged by the bus per second, can the memory not become a factor to rece the overall computing speed of the computer
I don't know if you are satisfied with this answer.
some CPUs have two levels of flash memory. The speed of data exchange between flash memory and CPU is very close to that of CPU itself
in general, the data exchange between memory and CPU is one or two orders of magnitude lower than the computing speed of CPU itself (depending on which bus the computer uses), which is the biggest bottleneck affecting the overall computing speed of a computer
so your question is not completely correct. The relationship between the overall computing power and memory size of the computer and the relationship between the overall computing power of the computer and the data exchange speed of the bus are secondary
only when the bus speed is constant and the size of memory is not less than the maximum number of bytes that can be exchanged by the bus per second, can the memory not become a factor to rece the overall computing speed of the computer
I don't know if you are satisfied with this answer.
8. The first is the CPU architecture, if the architecture is the same. The CPU with high main frequency has better performance<
how to judge CPU:
[architecture first]
Architecture is the basis of processor, which plays a decisive role in the overall performance of processor. Under the same main frequency, the performance gap of processors with different architectures can reach 2-5 times. We can see the importance of architecture
[then the main frequency]
improving the main frequency is very important for improving the CPU operation speed. For example, if a CPU executes an operation instruction in a clock cycle, when the CPU runs at 100MHz, it will be twice as fast as when it runs at 50MHz. Because the clock cycle time of 100MHz is half less than that of 50MHz, that is to say, the CPU operating at 100MHz only needs 10ns to execute an operation instruction, which is half less than 20ns operating at 50MHz, so the natural operation speed is doubled
[the last is the number of cores]
the number of cores has little effect on CPU performance. Generally, four cores are fully capable of daily life. When the main frequency is too low, increasing the number of cores can not improve the overall performance of CPU.
how to judge CPU:
[architecture first]
Architecture is the basis of processor, which plays a decisive role in the overall performance of processor. Under the same main frequency, the performance gap of processors with different architectures can reach 2-5 times. We can see the importance of architecture
[then the main frequency]
improving the main frequency is very important for improving the CPU operation speed. For example, if a CPU executes an operation instruction in a clock cycle, when the CPU runs at 100MHz, it will be twice as fast as when it runs at 50MHz. Because the clock cycle time of 100MHz is half less than that of 50MHz, that is to say, the CPU operating at 100MHz only needs 10ns to execute an operation instruction, which is half less than 20ns operating at 50MHz, so the natural operation speed is doubled
[the last is the number of cores]
the number of cores has little effect on CPU performance. Generally, four cores are fully capable of daily life. When the main frequency is too low, increasing the number of cores can not improve the overall performance of CPU.
9. Rui frequency can increase the frequency in a short time according to the need, and the side effect is that the heat will increase. Running in Rui frequency for a long time will increase the burden of computer heat dissipation. Therefore, it is not recommended to use Rui frequency as a performance reference, and it is better to use the standard frequency of CPU. In addition, the gap you mentioned can hardly be experienced in the process of use, so don't care too much, You can continue to consider other computer factors to help you decide which computer to buy
10. The higher the main frequency, the faster the calculation speed. But the higher the main frequency is not necessarily good, it also depends on the degree of software optimization, CPU architecture, instruction set. If the dominant frequency is high and other optimized architectures can't keep up, it is high frequency and low energy.
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