[Fixed/Workaround] Asus G51J(x) CPU throttling investigation

[thalanix]

testing, screenshots, results: http://g51jbsod.wikia.com/wiki/CPU_throttling
BIOS disassembly: http://g51jbsod.wikia.com/wiki/BIOS_disassembly
all discussion goes here.
as with the BSoD thread, let's keep it mostly on topic.

a short summary:
under intense (power consumption) load, the CPU will be throttled to 900MHz. the simplest test is #3, run furmark and prime95 together while using RealTemp and GPU-z to watch clocks. observe what happens to the CPU when you toggle (space) rendering in furmark.

READ BELOW IF YOU'RE INTERESTED IN REMOVING THE LIMIT (BOTH G51J AND G51Jx)

http://g51jbsod.wikia.com/wiki/CPU_throttling#fix

note that this might:
- shut down your power brick (need a hard reset from the wall) if you pull more than it can provide
- raise your temps by a good amount (especially during games that would throttle before)

this does not:
- disable thermal throttling for i2c and driver-based thermal monitors (ACPI, CPU, GPU)

quick solution for windows:
1) download the latest throttlestop @ http://www.fileden.com/files/2008/3/...rottleStop.zip
2) check off "Unlock bidirectional PROCHOT" and "Start minimized" in options
3) uncheck "BD PROCHOT" in the main screen"
4) drop a shortcut to throttlestop in your startup folder

no more worries about throttling.

/READ

[ALLurGroceries]

EDIT: WORKAROUND FOR LINUX:

sudo apt-get install msrtool
sudo modprobe msr
sudo wrmsr 0x1FC 2

[unclewebb]

Have you guys tried ThrottleStop yet?

It will let you monitor for the 3 main types of throttling that are being used on laptops. The Dell XPS 1645 owners have had great results using this tool and with a suitable power supply, they have been able to use ThrottleStop to reverse Dell's throttling schemes.

Give it a try and post some feedback. If you run a log file when testing send it my way or post your results and I'll be happy to have a look at it.

[ALLurGroceries]

EDIT: NOPE. Just had to wait a few minutes. And then it starts swinging all over the place again. It looked like it worked... ARGH!

[DCMAKER]

ok so its not a psu problem but when you turn up the brightness it starts to throttle in windows. So its a power issue we think right? but its not from the psu so where does the screen pull power from? motherboard? psu? This is what i dont understand. Sorry i dont understand laptops. on a pc you have everything pulling form the psu rails(minus a few things pull from MB) So my point is if the power form psu goes to the laptop where does it first reach? after there how does it distribute? If the screen pulls from board that would mean the board is the problem right? but if there something thye power source reaches before the MB? The point is we need to know how the power is distributed between the hardware for us to figure out where the bottleneck is. That is if its a power distribution issue. Allurgrocies in his video made a statement saying ti could be a bios issue maybe. not saying it is or isn't. I dont know how bios would affect this because a power issue seems more realistic to em at least. Though my knowledge is limited ^^


*EDIT* did see allurgrocies post. So ignore this if throttlestep works ^^

[ALLurGroceries]

EDIT: NO I was wrong. I just had to get the Intel monitor going, it still swings after 4+ mins in furmark.

[DCMAKER]

ok so if it works as a band-aod. What is the source of this problem? and does that mean leave throttle stop off so you dont eat your battery up but then turn it on if you plan on playing a game/use a heavy duty app?

[ALLurGroceries]

No I have to take that back. It seemed to lock it for a bit and then when it gets into it for a few mins it still swings, sorry I jumped the gun.

[DCMAKER]

blast. So back to my point. did you read my long post. If it is a power issue we need to find the bottle neck. I think you cna make sense on my post

[thalanix]

Originally Posted by ALLurGroceries

No I have to take that back. It seemed to lock it for a bit and then when it gets into it for a few mins it still swings, sorry I jumped the gun.

was about to say, unless my machine has deeper issues other than the keyboard light hotkeys not working, i don't see how else i can be doing this wrong. multi is locked to 13 (12 without turbo boost), and it still fluctuates.

temps are not an issue.