How about of the Fan noise of your Z540/590?

I read some threads of the forum, and find that somebody said the fan of Z is keep running, but the fan noise can be ignored.

Like somebody said, my Z540's fan is almost running, that is true.
the difference is that it's noise cannot be ignored.

Under not heavy use, e.g. just surf internet, the fan will accelerate then slow down that go round and round. when it is accelerating, it's noise is not low and cannot be ignored, especially in a silent place, eg. library, bedroom. it sounds like a small hairdryer.

 

Putting Vaio control center in silent mode, Vista in energy saving and undervolting the CPU can help a lot.

 

I agree. Although undervolting won't help with idle fan noise much, but it helps a lot with the fan noise under high load. See the undervolting guide for more info. The 'silent' setting throttles the CPU but ensures the fan stays much quieter.

 

thank you guys

the cpu of my z540 is P8400. if I use RMClock to make undervolting how much voltage does it can be set?

whether can RMClock work on vista flawlessly now? because I ever heard that there is some problem when RMClock is running in Vita.

Whether Rmclock can conflict with sony power management?

thanks

 

It works in Vista as far as I know (I use XP personally, but tried RMClock in Vista and it seemed to work). The only snag is that you might have to disable UAC or whatever if you want it to start automatically without annoying confirmations popping up.

I can't tell you what the minimum voltage is for your CPU type - it's unique to every processor so you'll have to find your minimum by following the guide. It's not hard to do but takes a bit of time if you want to do the full stability tests.

 

Good advice by InfyMcGirk. To add: Stability tests aren't mandatory. I never did any stability tests, I'm happy with my results. Once I had a crash right after undervolting so I raised the voltage one step. No more crashes since.

 

I try to use RMClock to undervolt the CPU of My Z540.
first, I find the software could Not correctly recognize my processor.
Finally, I use RMClock to decrease the voltage from 1.1375v to 0.9375v. decreased 0.2v.
the highest temp of CPU droped from 85c to 61c, however the idle temp seems no change.



The lowest voltage of 8X that can be set is 0.9375v with which my z540 can be running steady (tested by using ORTHOS). the temp of CPU is maximum at 61c





if I decrease the voltage of 8X one step to 0.9250v (the lowest voltage can be chosen for any multipliers), ORTHOS was crashed after running 16 sec only.





Following is the temp of CPU before using RMClock to make undervolting. the temp can reach to 85c.





The idle temp of CPU seems same regardless of whether I use RMClock to undervolt because the voltage 0.9250v is already the lowest one I can choose to set any multiplier (6X, 7X, or 8X)





Is there anything needed to be improved?

Why my p8400 only has THREE multipliers, so few? I read some threads that show SIX or more multipliers?

Thanks

 

rmclock cannot recognize half multiplier so far, maybe that is why?

 

That seems like an excellent result! I share your frustration that it's not possible to lower the voltage for the lowest multiplier when the results are so promising for the higher multipliers. Anyway, your new settings should significantly reduce fan noise (and increase battery life) for CPU intensive tasks...

 

Thanks you so much

I have raised the voltage one step for both 7X and 8x, just for safer..