Unleashing the Bear(lake): Changing "strap" on the fly

[G H Z]

Damn thats nice Stilt, is there a thread or post somewhere that covers the PLL Vcc mod?

[XtremeTiramisu]

wow nice fsb there.. all my cpus seem to hit an fsb wall between 490-514fsb heh

After reading your msg, I think the blame should be my E6700 CPU instead of the P5K-Dlx. I'm hitting the FSB Wall at 495 to be exact at multi x7. However, I don't know if it's also due to the NBCC (north bridge core clock) calculation that's putting too much stress on the motherboard becouse E6700 is a x10 multi by default.

[The Stilt]

You may want to try adjusting the "CPU PLL Voltage" in bios
On P5K Deluxe it goes from the stock value of 1.5V to 1.8V and on P5K values 1.5V & 1.7V can be selected.

My cpu achieves it maximum FSB with PLL Vcc at 1.910V.
Thats why the modification is needed.

Please note that on Asus boards PLL Vcc is tied with SB 1.5V Voltage, so raising it will also raise the heat dissipation on SB!

[ownage]

I will try this today on my AB9 p965, i'm curious how it will go.
So what can this tweak do:??
-tighten strap for better performance
-when loosening strap more FSB??
-When loosening strap higher memory speeds??

[alpha0ne]

Thanks for the awesome work Felix and Stilt

[JohnMike]

Please note that on Asus boards PLL Vcc is tied with SB 1.5V Voltage, so raising it will also raise the heat dissipation on SB!

Tied?!... you mean that if we raise PLL Vcc the SB voltage will raise automatically?!... I'm asking because there's the option on bios for SB voltage only.

Regards

[The Stilt]

Tied?!... you mean that if we raise PLL Vcc the SB voltage will raise automatically?!... I'm asking because there's the option on bios for SB voltage only.

Regards

Yes, SB 1.5V voltage raises.
It is not a problem if it is properly cooled since the maximum rated voltage for ICH9 is 2.1V.

[JohnMike]

Yes, SB 1.5V voltage raises.
It is not a problem if it is properly cooled since the maximum rated voltage for ICH9 is 2.1V.

Huumm... Well i raised the PLL Vcc to 1.8v and save/restart, went back to bios and i still have my SB voltage in auto.. It means that it should be at 1.5v?!... And if i put the SB voltage in manual, like 1.3v?! what happens then?!

Regards

[ownage]

It seems this should work with P965 boards, and aasmaukr did the tweak on an ABIT P965 IB9 board, but it seems it doesnt work with AB9.

I can see the "Performance level" option, but i cant Apply if i change a setting. I can use older versions (3.3beta) which dont have this option.

[VictorWang]

asus p35 fsb strap really strange and not the same as before.
awsome work The Stilt and Geroge.

[The Stilt]

It seems this should work with P965 boards, and aasmaukr did the tweak on an ABIT P965 IB9 board, but it seems it doesnt work with AB9.

I can see the "Performance level" option, but i cant Apply if i change a setting. I can use older versions (3.3beta) which dont have this option.

Start CPU-Z and save the register dump.
Send the dump to stilt@elektroni.fi

[eva2000]

You may want to try adjusting the "CPU PLL Voltage" in bios
On P5K Deluxe it goes from the stock value of 1.5V to 1.8V and on P5K values 1.5V & 1.7V can be selected.

My cpu achieves it maximum FSB with PLL Vcc at 1.910V.
Thats why the modification is needed.

Please note that on Asus boards PLL Vcc is tied with SB 1.5V Voltage, so raising it will also raise the heat dissipation on SB!

thanks for the tip !

found i could memtest86+ v1.70 if i pushed the CPU PLL voltage in bios from 1.6v to 1.8v (max). Also meant I could squeeze out a bit more FSB with 8x493FSB boot from bios into windows and setFSB bump from 493FSB to 500FSB

@8x493FSB at 1.6375v bios set






@498FSB at 1.6375v bios set


@500FSB at 1.6375v bios set


Prior FSB ceiling on E6750 G0 was 490FSB now it's about 493-495FSB... heh

[Hutch]

Start CPU-Z and save the register dump.
Send the dump to stilt@elektroni.fi

I get the same thing on my P965 DS3 if I use 1:1 and Cas 5.

You've gotta use Cas 3 or 4 or a different memory ratio and it works fine.

[ownage]

Start CPU-Z and save the register dump.
Send the dump to stilt@elektroni.fi

You've got mail

[The Stilt]

Ownage, your performance level is Level 13!

The highest functional value on P35 is level 12.

It seems that P965 can go even higher (looser).

If your performance level is not displayed it means that it is out of the range.

Changing it will work just fine since there is nothing wrong with the programming.
You can start by setting it to level 12 and lower it from there.

Huge boost in performance incoming

[ownage]

Ownage, your performance level is Level 13!

The highest functional value on P35 is level 12.

It seems that P965 can go even higher (looser).

If your performance level is not displayed it means that it is out of the range.

Changing it will work just fine since there is nothing wrong with the programming.
You can start by setting it to level 12 and lower it from there.

Huge boost in performance incoming

:P,

Problem is Memset doesn't allow me to press Apply, so i cant apply any setting. I installed older versions of memset, even memset3.3beta, and they work fine. Only the beta2 with the performance option doesn't allow me to press Apply.
Look at the screenshot above, the buttons are grey, and cant be used.

[harleybro]

Strange thing I have seen is apparently it will hopld a performance level setting that's too low I was running at 5200 12x435 ram at level 6 approx. 540 4,4,3,4. Then I crashed upon rebooting I couldn't get into windows it would keep bsod. Finally got into windows and quickly set to diagnostic mode. I had noticed when I first opened memset it was @ per lvl 4 Coming back into windows in diagnostic it was slightly more stable. I tried changing memset to 6 then clockgening up with consistant crashes. I finally uninstalled memset and was 100% more stable. I reinstalled memset and it worked fine. I boot into windows easily at 4.5 so I started clocking again an hour later same sort of issue but was so bad since I was runnin in diag. mode already I had no savior. Load screen would work but as soon as the actual desktop was about to appear it would crash. I tried setting everything but to stock in the bios and still had issues. I finally decided to reload OS which I did at my same OC'd settings of 4.5 gig without a hitch.

[ChaosMinionX]

Would it be possible for a manufacturer to include the performance level setting in BIOS? Or is there something complicated about it, and why havent they already done this, I get like 200-300mb better on most things, and latency goes down 10ns....Would be nice if they could put this in a BIOS

[ziddey]

i think dfi is going to include it in the dark bios

[eva2000]

Would it be possible for a manufacturer to include the performance level setting in BIOS? Or is there something complicated about it, and why havent they already done this, I get like 200-300mb better on most things, and latency goes down 10ns....Would be nice if they could put this in a BIOS

re-read bingo13's post in this thread IIRC

P5K already has bios options to alter the performance levels in the form of transaction booster and dram static read

[zbogorgon]

You may want to try adjusting the "CPU PLL Voltage" in bios
On P5K Deluxe it goes from the stock value of 1.5V to 1.8V and on P5K values 1.5V & 1.7V can be selected.

My cpu achieves it maximum FSB with PLL Vcc at 1.910V.
Thats why the modification is needed.

Please note that on Asus boards PLL Vcc is tied with SB 1.5V Voltage, so raising it will also raise the heat dissipation on SB!

Are you talking about hardware modification ? any pics ?

[NLight95]

How does 4x1 GB affect the strap change? Does it lower? Is it possible to run 499 FSB with all DIMM slots populated?

[synergy]

Quick Bearlake question (ASUS P5K Deluxe),
is there any way to use a FSB:RAM divider so
that the RAM actually runs slower than the FSB?

e.g. so that one could run a CPU @ 9x430 but with RAM
that had its clock limit closer to DDR2-667 or DDR2-533?

If not, could one increase RAM timing cycle counts
from say 5-5-5-12 to 9-9-9-16 or whatever
the proportionately slower numbers would be so that you
could run DDR2-533 (266x2) memory at CPU clock
usefully any closer to the 430x9 area?

Thanks!

[Gam3Ra]

Gigabyte P35-DS3 have option in bios for these performance level
And I see it does NOT affect for maximum stability FSB/RAM. In my system max stable ram frequency is the same at performance level of 12 and 8 (at 7 lock up system).
Very nice

[before]

Humm... is it really 'only' strap related? Just curious.

For instance, FED14249h is set to 8 (or 7, 9, etc) only if a memory module is plugged in CH1. That's obvious, I know. (same for .+649h of course...).

I mean, these addresses appear to be set differently for each memory module. And, just gessing, might be able to be different... a module can run 7 while another cannot. I didn't try that so I can say it's true.

I may be wrong you know, but it just makes think the PL or whatever one's want it to be called, is more RAM related than chipset strap related (knowing all the stuff is closely linked).