Go Back   Hardware Canucks > HARDWARE > CPU's and Motherboards

    
Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old August 10, 2008, 06:55 AM
yamawho's Avatar
Allstar
 
Join Date: Jul 2008
Location: Rosemere, Qc, Canada
Posts: 860
Default Subtle changes to mobo operation P45 & P35

Having built two new systems based on Asus P5Q Pro and P5K SE lately, I have noticed differences in the way they operate compared to others before.

1) There is a pause on boot:

This happens when I turn off the psu for whatever reason. On system boot, it comes to life then turns off for a few seconds. Then It turns itself back on and keeps booting.

Whenever a bios change is made and the change is saved, I reboot and the same thing happens.

2) There is a change in cpu clock speed at idle:

Although I have not installed the new EPU power saving software, they automatically reduce the multiplier. In the case of my overclocked e4300 running at 333 fsb @ 3Ghz, at idle it is running at x6 @ 2Ghz. The moment the cpu is called upon for a task it jumps to x9 @ 3Ghz.

This feature will also lower the vcore.

Anyone notice this and maybe other differences ?
Reply With Quote
  #2 (permalink)  
Old August 10, 2008, 07:13 AM
3.0charlie's Avatar
3.0 "I kill SR2's" Charlie
F@H
 
Join Date: May 2007
Location: Laval, QC
Posts: 9,649

My System Specs

Default

1) Yes, the new P45 boards (I have a few) all do that dual start.
2) Nope, none of my boards with all the options disabled do that. They all run at the specified Vcore and multi, as selected in the BIOS.
__________________
Hydro-Quebec is salivating...
Reply With Quote
  #3 (permalink)  
Old August 10, 2008, 07:28 AM
yamawho's Avatar
Allstar
 
Join Date: Jul 2008
Location: Rosemere, Qc, Canada
Posts: 860
Default

I assume Item 2 is Speedstep, any disadvantages to leaving it on ?
Reply With Quote
  #4 (permalink)  
Old August 10, 2008, 08:01 AM
3.0charlie's Avatar
3.0 "I kill SR2's" Charlie
F@H
 
Join Date: May 2007
Location: Laval, QC
Posts: 9,649

My System Specs

Default

Yes, Speedstep it is. And no disavantage to leave it on, even when oc'ing.
__________________
Hydro-Quebec is salivating...
Reply With Quote
  #5 (permalink)  
Old August 10, 2008, 09:06 AM
"Quote This..."
F@H
 
Join Date: Nov 2007
Location: Hell
Posts: 3,833
Default

It is the ASUS AINap that installs with the chipset drivers that change the multiplier based on load. I've benched with and without this and there is no difference.
Reply With Quote
  #6 (permalink)  
Old August 10, 2008, 09:33 AM
MpG's Avatar
MpG MpG is offline
Hall Of Fame
 
Join Date: Aug 2007
Location: Kitchener, ON
Posts: 3,144
Default

1) My P35 board does that too, and my X38 will do it after a full power-down (PSU actually turned off). As I understand it, it's just a quick double-check by the board before fully powering on.

2) Shouldn't be an issue, although if your FSB is high enough, it's not impossible that the reduced voltage might not be enough to power the chip at 6xFSB. Only a theory, though. I've never actually encountered it myself, since I always disable Speedstep.
__________________
i7 2600K | ASUS Maximus IV GENE-Z | 580GTX | Corsair DDR3-2133
Reply With Quote
Reply


Thread Tools
Display Modes