HP Pavilion slow CPU clock
 

Hi all,

I have a HP Pavilion 15 laptop with CPU i7-4510U and DDR3-1600.
`dmidecode` reports memory clock: 1600MHz (0.6ns), cpu size: 1999MHz, cpu capacity: 3100MHz, and cpu clock: 100MHz.
What I don't understand is the last value, 100MHz. Is this the so-called FSB? Does it mean that my CPU is transferring data with the RAM at 100MHz? If my RAM is at 1600MHz, does it mean that my RAM is waiting because the CPU is requesting data to slowly?

I'll be grateful for any info to help my understand this. Thanks.

You should use

cat /proc/cpuinfo

What do I do with it? It doesn't seem to report anything about "external clock" which is what I'm asking about. It only reports the CPU frequency which is the same value reported by dmidecode (2000MHz).

Modern CPUs do not have a front side bus.

In a modern CPU, the PCIe bus is included. It runs with 100 MHz clock frequency.

ok so,

- what is this 100MHz clock used for? To regulate communication speed between components on the board (cpu, ram)?

- if my cpu has a 3GHz frequency, my ram 1600MHz, and this "external clock" is at 100MHz, does it mean that data is transferred from ram to cpu at 100MHz? I don't understand this.

I'm sorry to be rude but you don't, honestly , think that modern CPUs and RAM communicate at 100MHz, do you?!
The clock is used with multipliers to provide RAM and CPU clocks -- if it hass them go into your motherboard's overclocking settings and see...

The RAM runs at 1600 MHz and the data transfer rate is the double.

You should read some basic computer hardware articles.

Can you suggest any good one?

This should provide some basic information on what you're wanting to know:-

https://en.wikipedia.org/wiki/CPU_multiplier

And this:-

https://en.wikipedia.org/wiki/Clock_rate

Also this:-

http://homepage.cs.uri.edu/faculty/w.../Reading04.htm


Mike. ;)