Has anyone successfully overclocked p7805u CPU?

Wanted to see if anyone was able to overclock the stock P8400 dual core cpu in any way.

 

Nope, its not possible.

Not only are the multipliers locked, but the crystal gateway uses that generates clocks is locked in Safe mode so it doesnt allow manupiliation of the FSB.

The only way to get higher clock speeds is to upgrade CPU's

 

Thanks mate, what CPU would you personally recommend upgrading to, for CPU intensive gaming like GTA 4 or Crysis. Any affordable overclockable CPU's? Some links would be highly appreciated.

 

the t9900 and x9100 are the two top dogs of CPU for the 78xx series. Both run at 3.06gHz

The t9900 is locked and runs at 35watts

the x9100 is unlocked and runs at 44 watts, but since gateway only allows for a 3gHz overclock you can never actually go above the base line 3.06gHz of the x9100.

About the "best" cpu is the t9900 (but the x9100 is generally cheaper)

As to links... i usually CPU shop on Ebay

 

Dont forget the X7800, you can get those for about $200 on ebay, then run slightly hot, but so will any of the ones Kamin listed.

This is where I bought my x7800. Very fast shipping, dont be deterred that its from Hong Kong, I had my doubts as well but had no problems.

The ones he is selling are the last revision before retail, meaning in the coding they are an Engineering Sample, but on the outside its a retail chip, its basically a retail chip.

Anyways, stock clock is 2.6Ghz, can be overclocked to 2.8 and 3.0.

 

Wow great CPU for the price! So you are sure it can be overclocked on the Gateway p7805u after replacing my stock one with the new one?

 

Yes, my 6860FX could only overclock through the BIOS when an Extreme CPU was installed, it will be the same for you.

 

no i dont think you can oc even an extreme cpu on the 7805u because the bios just doesnt have the option for it while gateway released a bios that allows extreme cpu oc support for your 68 series the 78 series does not have this option i checked my bios and nothing is in there. maybe if we got a dump from one of the very few 78 series that had an extreme processor in it then maybe we could

 

There is a 3Ghz limit on the BIOS for some reason, not sure why, so your x9100 is not able to overclock past stock speeds, but the X7800 can take full advantage of it's available options up to 3Ghz.

 

Thanks again narsnail, you are a lifesaver. Two more questions if you will. How much of an improvement would I achieve in installing this new CPU over the stock P8400? And about the overclocking, would the option appear in the Bios automatically after installing the new Extreme CPU?

 

Wait... i didnt think the 78xx models could OC the previous gen CPUs either. I think Altunay ended up putting an x9000 in the 7811 or 7801 and it was stuck at 2.8gHz and didnt allow for any overclock.

This might have changed with the all of the BIOS updates, but i havent seen anyone confirm that.

 

It appears you are correct, but after looking through the BIOS update thread the 9c.10.00 BIOS can apparently clock the X9100 past 3.06, from what I read. I'm not sure whether it still needed to be implemented or not, but thats what it claimed.

 

Yeah the gateway BIOS updates largely suck. THey actually havent done anything that i can tell except enable RAID.

Every one past .08 has promised the OC and other things and for the most part i think everyone has left disappointed. Whats the point of the BIOS flash if you have nothing wrong with the system and gain nothing from it.

 

So stupid, why dont they just do it, I can hardly see why it is such a huge deal. Or give me the BIOS and I will friggen unlock it my self.

 

DAMN RIGHT!!!! i actually scooped up the p7805u on the basis of reading E-wrecked's communique with Gateway in which it is mentioned that OC for X9100 was apparently enabled. Found a sweet deal on ebay for a X9100 equipped p7805u and thpught i was good to go.....

lo and behold, i then find out (much to my dismay) that i cant OC it after all and i had also forked out for ridiculous cooling too (Cryo LX, 3x scyrhe s-flex fans for LX mod, Evercool NB-MA extractor fans & ICD7)

 

wait what? What all to you have hooked up to cool your rig? Can i see a pic (appoligies for the OT post)

 

2nded! Ill try and get a hold of my trusty Phoenix BIOS Editor again and see if its simple enough for me to do myself.

 

Pictures aren't the greatest because i am solely reliant on my Samsung U800's camera but here they are nevertheless:-







Photo 1: p7805u with Evercool NB-MA1 fan attached (overvolted @ 12v running off adapter) and modded Cryo LX (@12v too) sitting underneath. Had the Evercool fan and Cryo LX initially running off the same AC adapter @ 12v but caused both to be underpowered. Decided to switch over to 2 separate adapters for each respectively.

Photo 2: close up of Evercool fan. Overvolting @ 12v ensures that its rpm (rated at 3800rpm @ 5v; no idea how fast it is currently spinning at 12v but it's like a mini leaf blower!) far exceeds internal CPU fan causing massive negative pressure which means hot air is drawn from heatsink straight out. Under heavy stress testing (OCCT linpack), my X9100 can reach up to 93C and the Evercool Fan feels like a mini hand dryer with the amount of hot air that it pushes out.

Photo 3: Cryo LX flipped over with 3x 1600rpm scythe s-flex fans installed. Fans positioned differently from wassupdog's install ( http://forum.notebookreview.com/showthread.php?t=391310 - his s-flex fans are facing the right way with logo facing upwards when you look down through vents) but i found that flipping them over (back to front) gives far better airflow especially around the sides. Fans overvolted @ 12v, running off adapter.

Photo 4: S-flex vs stock fans.

Photo 5: Modded Cryo LX top-down view with ICD7 tubes (one of which kindly dontated by Andrew from IC).

Also got my X9100 ( C0 stepping) undervolted @ 0.975v on all multipliers bar 10.5x, 11x & 11.5x which are on 1.000v, 1.037v & 1.075v respectively via CPUgenie. After all that, it still idles at 54C I dont know whether to laugh or cry. At this rate, if OC on X9100 becomes possible someday, I'd probably have to look into getting some ridiculously extreme cooling solution that isnt even remotely possible for me to accquire like liquid N2 or dry ice to cool my silly rig .

 

wow... I hate to say it but you have to have a slagged CPU. Theres nothing else that can account for it.

With that amount of cooling my x9000 (runs the same voltage and watts as your x9100) would be floating in the low to mid 20's

but... wow thats alot of cooling.

 

Not a problem my friend. I am actually glad to see people sharing on my post. Any way back to my topic; I would like to know if after installing the new X7800 CPU I would automatically get the option to overclock in the bios, or if I would have to take other steps (such as updating the bios through flashing or other means).

 

I honestly dont know of anyone here that has an X7800 installed in a 7805, theres no reason why it shouldnt, I know it did on my 6860, I assumed it would over-clock but apparently there was no overclocking in the later models. For $200 though it would be worth the bargain, and its not a slow processor by any means, 2.6Ghz is still pretty fast.

 

I see narsnail. I noticed in one of your posts you said you could modify Bios's. If by any chance I can't overclock the extreme CPU, would you be able to modify the p7805u's bios to allow it?

 

No idea, I have the editor but that doesnt mean I know what im doing with it or can actually change things.

One thing that might work is flashing a 6860 BIOS, and see if that works to allow overclocking in the later models, im not sure if it would be possible but it would be worth a try.

 

A PLL (clock generator) mod could overclock the fsb.

Do you happen to know the PLL used in your notebook?

Edit:
Or can you find the PLL on your motherboard?

 

Unfortunatly no, I dont think you will have any option to OC with the older CPU's. People have previously tried it and i dont believe the OC capability was given as an option.

Wheither or not that was because it had an older the .08 BIOS or that Gateway never imagined the older CPU's would be used i dont know.

lol yeah i tried my hand at the Pheonix Editor once and all i did was confuse the hell out of myself. If you can figure something out i would love to know how to do it though... i hear 3.6gHz calling my name still

I know the 78xx BIOS to the 68xx series causes a bricked system (johnksss tried it) but i'm not sure if anyone tried it the other way around, but with the different platform i'm not sure if the BIOS would be compatible, or at least wouldnt be able to speak to the hardware correctly...

but i have no idea honestly how BIOS work on a technical level so take all that i say here with a grain of salt

Our PLL is in a locked SAFE mode. Its impossible to OC with setFSB or any other program. We would have to have someone risk their system to try to jumperbridge the pll to allow un-SAFE mode access (and even then i dont think it will work because the crystal itself is supposedly locked according to the manufactuer agent i spoke with)

 

Next on the cards is lapping my heatsink; I'm gonna make it shine like a mirror lol. Better than forking out £188 for one of shirleycpu's E0 stepping X9100s.

Given that mine's a C0 stepping one; probably somewhat explains the high idle temps?

 

what PLL is it?
I would like to read the datasheet.

Edit: is it ICS9LPRS355BGLF?


Edit#2:
I have read this:
http://forum.notebookreview.com/showthread.php?t=373662

In that thread it says that you have TME mode enabled, hence no software programming of the M/N programming registers is allowed.

It is very easy to overcome that (I have done it).

I have done it with my current system. I emailed abo (creator of setfsb) and he told me he couldn't support it.
So I then talked to a forum member (nando4) and he helped me.

Look in my sig, the thread about setfsb and clockgen. It has all the info you need.
http://forum.notebookreview.com/showthread.php?t=393027


It's a simple mod.
After doing that mod I have been able to overclock my T7300 (2ghz stock) to 2.72ghz.
I can help you with it and nando4 may help too (if we're lucky).

 

[/quote]Look in my sig, the thread about setfsb and clockgen. It has all the info you need.
http://forum.notebookreview.com/showthread.php?t=393027


It's a simple mod.
After doing that mod I have been able to overclock my T7300 (2ghz stock) to 2.72ghz.
I can help you with it and nando4 may help too (if we're lucky).[/QUOTE]

Heh, man I'm sorry but when I look at that thread it feels like I am reading Arabic. It's way too complicated for my computer ability, but what you are saying is that you CAN overclock a P8400 or that you can overclock an X7800 on the p7805u?

 

lol I didnt understand it either but from what i gather, any remote possbility of an OC on TME locked PLL requires hardware modding + setfsb; setfsb software mod alone wont cut it

 

It doesn't matter what CPU you use, this mod is done to the clock generator.
Basically it unlocks the clock generator so that setfsb can program the new frequency.

I could give you step by step instructions and help along the way.
I'm already going to help another user with this notebook (hopefully that user will then write a guide on how to do it).

yes hardware modding is required.
But if you know how to solder and have a small soldering iron tip you should be fine.

 

Heh thanks mate but hardware modding is not my forte. I will let you go ahead and work it out with this other person for now. Please let me know if you guys succeed.

 

ok, will do

 

here are the documents for the PLL:
http://www.idt.com/?partID=9LPRS355CGLFT

the datasheet I downloaded from that ^ link was ICS954321.
I believe it's the same PLL.

Edit: these datasheets are wrong ^^^.
try looking at these:
http://www.idt.com/index.cfm?app=search&searchType=document&search=9lprs&source=search_menu

 

Sorry to those who read my last two posts (deleted them now).
I got a bit confused as to which modification was needed for this notebook.

The right mod would be the one I did here:
http://forum.notebookreview.com/showthread.php?t=393027

 

If anyone here is going to do the modification, can you please post a screenshot of the diagnosis screen in setfsb.

download the latest version of setfsb here:
http://www13.plala.or.jp/setfsb/

Start setfsb, select ICS9LPRS355BGLF then press "getfsb".
Now click on the "diagnosis" tab, next click on the "capture" button.

Now go to the setfsb folder, then open the "capture" folder. you should see an image file. please upload that file here.

Or you can just take a screenshot by using ALT + PRTSC.
upload the screenshot here.

I will tell you the next step once someone does that ^^^.

 

is this what your looking for?

 

yes, thanks.

*I have read the datasheets I gave a link to before and they seem wrong.
If anyone can find the real datasheet it would be good.*

Next step is to test if byte 9 bit 6 is the TME bit.
(if we had the datasheet we wouldnt need to test this).


follow the instructions in the attached pic:

 

If the value of that register (byte 9) remains 45 after you try to change it to 05 (00000101), then we know it is the TME bit.

why?
Because most of the time the TME bit is read-only, so you cant change it with software. Hence we will do it with a hardware mod.

 

looks like it changed.....

 

*I will work with the datasheets "ICS9LPRS525" and "ICS9LPRS501" since it is the closest one I could find.*
they can be downloaded here:
http://www.idt.com/index.cfm?app=search&searchType=document&search=9lprs&source=search_menu

 

That is ether very bad or very good.

It either means that byte 9 bit 6 is not the TME bit.
Or it means the bit is read-write so no hardware mod is needed.

Test this by moving the top slider in setfsb slightly to the right, then press setfsb.
If your CPU is overclocked then ...
otherwise please describe what happens, if anything.

 

for anyone following this, I'm corrently using this datasheet:


http://www.idt.com/?partID=9LPRS355CGLFT

the datasheet I downloaded from that ^ link was ICS954321.
I believe it's the same PLL.

Please read page 9. read byte 10, bit 7:
PLLM/N Programming
Enable, is a RW bit.

If this is the correct datasheet then *no hardware mod needed*.

 

here is a photo of bit 7 of byte 10, it already has the correct value:

 

ok I think I have found the TME bit.
It is a "reserved" bit, so there is no info on it. It could be something other than the TME bit so changing it is not safe.

Be carefull when changing that bit, it could cause damage.

 

ok here I have labled the bits 7, 6, 5, 4, 3, 2, 1 and 0.

 

I want to know where the PLL is, can someone tell me where it is or if it's where I think it is. I attached a pic.

 

I can't believe i didn't check this before, is the notebook on the montevina platform? If so then setfsb will not support it because of the chipset.

There is still a way to overclock it with a PLL mod.

The PLL (clock generator) needs to have one of it's pins connected to VDD (1.05V).
you have to use a 2K resistor between the pin and VDD.

Once you connect the pin to VDD your FSB will be changed from 266mhz to 333mhz.
No software is needed after this mod.

The first step is to find the PLL on the motherboard.
Then please take a photo of the PLL and post it on the forum.

I will give you further instructions if needed on the forum after you post the photo.


BTW the pin I believe will be pin 61 (FSLC).

refer to the attached table to see how the FSB will change when you change FSLC to 1.




Also read this thread:
http://forum.notebookreview.com/showthread.php?t=401682

The modification is basically the same.

 

Yeah it's Montevina. Here's the cpuz info for my p7808u:

 

well that is bad news if you want to use setfsb.
The only option I see now is to pull the FSLC pin high. That would take the FSB from 266mhz to exactly 333mhz.

You would need to make sure you have stable ram before you do this mod.

 

Yeah, such a mod would be too much for the current ram, we'd need to get pc3 10600 ram in order to run it stable. And for me a jump from 2.2(IDA) to to 2.5(non IDA) isn't worth a risky hardware mod.