Slow cpu clock on my Latitude E4300 in windows 7 x64. 665Mhz instead of 2400. High Performance in power options, AC power..

Speedstep enabled in bios. Bios shows btw 1800 current speed, but CPU-Z says it's 665. Also I run some CPU tests and convienced that the actual clock is as slow as 665, and doesnt go up during high load. Please, help.

 

I wouldn't trust CPU-z to show the speed correctly.

Use the monitoring page of RMClock. You should be able to see the speed, voltage and temperature all changing in real time.

John

 

I definitely sure that performance is low, i ran Everest CPU Queen test, and it shows performance is lower than Celeron 350 has. (Everest btw shows almost same CPU frequency)

btw. I can't run this RMClock, it says it cannot load RTCore64 driver (it has all rights and permissions)

 

Use the signed 64-bit RTcore.sys. There's a link at the end of the first post in the undervolting guide.

John

 

it shows
Core clock 790 mhz
Throttle 620 mhz

so - this is what i did know. How to fix that ?

 

These CPUs are designed to throttle down like you are seeing when lightly loaded. If the bios does not let you adjust C States then there might not be anything you can do.

Give ThrottleStop a try. It should help you run your CPU at full speed if that's what you want to do. Do some before and after benchmark tests using Everest to see if it makes any difference. Make sure the Control Panel -> Power Options minimum processor state is set to 100%. It might be set lower than that.

ThrottleStop 2.54
http://www.mediafire.com/?mnznfjoy2yy

 

Wired, i just started this ThrottleStop without turning it on and exit it. The CPU clock became normal, and benchmark resulst in Everest was also ok.

When I turned i on i saw some unexpected cpu clock from diffrent cpu meters (everest, cpu-z).

Another thing when I turned off Intel SpeedStep in bios (it says in this case my computer should run at LOWEST cpu frequency and it is impossible to change it by OS) - cpu clock was 1600 (which is acutally lowest shown by bios). When I turn it on, Windows 7 cut this clock to 650... and i'm unable to control it via Power Options. I thing it's kind of Bug in windows... can't work normally with my dell hadrware.

anyway thanks for ThrottleStop.

 

Did you make sure that this is adjusted correctly?



When you select the High Performance profile, it's still possible that this is not at 100% which can limit your performance.

If SpeedStep is disabled in the bios then most Dell laptops boot up with the lowest 6.0 multiplier.

Your CPU probably supports Intel Dynamic Acceleration which can result in a faster speed. What CPU do you have? A P8600 can automatically run a little faster and sometimes use a 9.5 multiplier instead of the 9.0 default multiplier. ThrottleStop will show this correctly. Just run a single theaded test like 1 thread of Prime95 Small FFTs to see this.

 

Yes it is adjusted correctly. Miniumum processor state is 100% for both battery and plugged in. As well as maxumum.

SpeedStep is enabled, so it should be ok.

I have P9400.

1. I run Prime95, and don't run ThrotleStop. cpu-z shows 665 mhz
2. I run ThrottleStop (monitoring mode) and see that cpu-z shows already 1300mhz. ThrottleStop shows 1600mhz. I run Prime95 - nothing change, same clocks.
3. I run Prime95, I turned on ThrottleStop (enabled mode). ThrottleStop still shows 1600mhz. Then i exit ThrottleStop - and magic happened. Cpu-z shows
full speed, everything ok.

So what do I do every time after laptop starts:
1. Run ThrottleStop,
2. Enabled it/disable it,
3. Close Throttle Stop.

And i get full speed. But bad thing is that this speed is not go down if there is no work for cpu.

 

What Bios version are you running?

What are your cpu temps after the machine has warmed up?

Which power adapter are you using - the 90 watt one, the 65 watt one, or the 45 watt?