Asus G71G multiplier gone bad. Runs on 6x only.

Hi gang.

The other day I was trying to figure out how bad can my T9400 sweat. I found PLL guide on this forum: pll-pinmod-overclocking-methods. Had to disassemble my G71G to find out that my PLL was ICS9LPRS929AKLF. Checked TME_READBACK according to the post and it was on 0 so I figured no need to check PCI2 Output Enable register since I was good to go with overclocking(maybe I was figuring it out wrong). I checked the slider in SETFSB just to be sure - moving it 1MHz, applied, it worked, moved it back to 266. And that's all the fun I had with SetFSB. I just figured it's better to rock the multipliers first.

At the same time as above was happending I found next two guides Undervolting guide and Advanced undervolting guide
And now...as far as I'm concerned all the changes I would make in RMclock would be only active durring current running session of the program, am I right?
Yes I made some multiplier chnages, trying to turn off SLFM and HFM states leaving only LFM and Turbo, played some with voltages etc. Did some testing, my laptop was unstable and it was freezing, decided to drop it.
Later on I even changed OS as I had some issues with Vista that came with the laptop (of course it was reinstalled couple of times ) and I was really fed up with it.

Recently while playing ARMA3 or DAYZ SA (I know those games are MHz hungry and my CPU might not have the power to pull it, but let's leave this aspect) I noticed my laptop used to do way better job in such games. Out of curiosity I checked HWINFO and CPU-Z and bam... multiplier is locked on x6...cpu instead of running @2533 runs @ 1500 and both cores use 100% and it still has some MHz left - it should have scaled up already to x9,5 (or x10 for turbo)
I figured...let's go back to RMClock and check what it might be. I set up a profile running at x8. Actiavated it via windows power plan and now game runs at x8.

What did I do back then to mess it up that bad and lock CPU to x6? I checked all windows power options and profiles (new Win anyways) and CPU scaling is correct. I don't remember doing any changes in BIOS since it's all locked.
If you need any additinal info I'll be happy to provide.

Help guys. Thanks.



Aaah yes...I used CrystalCPUID as well. Are changes made by this app permanent?

 

You might have triggered protection on the clock generator, try unpowering the machine totally (system battery and AC, bios battery should be fine) see if it resets and make sure you are on the high performance power setting.

 

OK...This is unbelievable...

I started to play with CrystalCPUID...It froze my laptop like it used to so I had to hard-power down. After that my OS wouldn't boot - winload.exe and ntoskrnl busted. I was getting really angry thinking I will have to set up OS all over again.
Thinking maybe I could do some revival with Hiren's boot USB I inserted my thumbdrive but was getting errors all the time (strange as I have 2 pendrives with Hiren's boot and both work 100%), no matter what I was trying to open - MiniXP, gpartedmagic,etc. Was getting errors like "LZMA data is corrupted", some *.exe being corrupted. 5Seconds googling on my phone and all was clear - busted RAM.

As I bought additional 2GB of RAM 6 months ago I knew where to look exactly. As soon as I pulled it out I was able to boot to OS and I see the multiplier is working correctly.

Main question is: What has busted RAM to do with locked CPU multiplier?

 

Possibly when modifying the clocks values stored in ram to be written got corrupted and you were writing junk data.

Bad memory can throw out pretty much every error you can think of.

 

Looks like turning off and on SpeedStep in BIOS did the trick. Just have to test the RAM chip and see if it's really bad.

 

Update:
Looks like it didn't do the trick after all. I'm confused and my brain is playing tricks on me-I can't remember what exactly did I change at this point. Does anyone have any ideas what's going on? Is it possible to lock the multiplier on the processor directly? I was playing only with software side.

Can anyone provide me with default settings for TME and PCI2 from SetFSB for mine T9400? I'd really appreciate it.


Alleged bad RAM is removed.

 

If the clock generator chip detects a change they have protection these days to lock the CPU multi to bottom.

 

Can anything be done about it except hammering the PLL off of the MoBo?

 

Reverse any modifications made, make sure its all working at stock specs. You know best what you did.

 

If I only remembered.

 

Well no one else is going to remember lol.

Best practise with modifications is to do one at any time.

 

After you disable EIST - SpeedStop in the bios, some laptops will boot up and be locked to the default 6 multiplier. If SpeedStep is disabled in Windows, the CPU will not be able to use the highest multiplier.

This is a popular mod for people that don't fully understand what SpeedStep is all about.

 

Ah I'd only ever seen it lock out turbo rather than clamp the non turbo too, interesting to know :₩