Radeon 9800 Mobility Chip Mod

anybody here try the mod to unlock up to 8 more pipes on this gpu? tranforming this chip into a X800 mobility? Only found small tid bits of info via google etc.

Are you sure that this is possible? The two chips being from different generations and all... i thought the 9800 series was only capable (hardware restrictions) of having 8 pipes, so soft modding wouldnt do anything...?

i could be wrong but that just seems like the logical thing...

i also found no informaion while googling...

got a link?

Do a 3dmark03 ORB search of 9800 mobilities, if there are some that are way higher than others then its possible.

http://service.futuremark.com/

*cough* I have two 16 piped mobility 9800 ORB results *cough*

*cough*bull*****cough*

however

the 9800 mobilities are just x800s with 8 pipes.

well "officially" the mobile 9800 used the core dubbed the M18, which many believed was derived not from the R350, but from the R420, aka X800. The mobile x800 is officially dubbed the M28. Physically examing the card will likely reveal both using their given name, and most likely samsung 2ns or 2.5ns memory modules. The 2 cards physically look different also, and not just cooling system, the PCBs are different. Though it may be possible that the modern M18 is just a rebadged and cut down M28, the likely hood of a simple soft mod turning a mobile 9800 into a mobile x800 are slim...and odds are it wouldnt even be stable under load, mobile 9800 runs at 350/300 where as the mobile x800 runs at 400/400 and the mobile x800 pro at 475/450, so I really doubt stock cooling of any laptop using the mobile 9800 could take the extra 4 pixel pipelines and 2x vertex shaders, ontop of a 50mhz/100mhz or 125mhz/150mhz overclock, to turn it into a true mobile x800/pro.

with laptops, modding and overclocking are not the best of ideas, if you want a mobile x800, buy a laptop with a mobile x800.

basically the theory is that the first 30 or so weeks of production have 16 pipes but they are disabled with a laser cut



pics1

mod pics


no bios hack needed, bridge the cut and your in business.
thread1
thread2

ati tools showing mine to have ddr3 memory also
default speeds of 350/297 are really conservative for this chip

without a single degree increase in temp under load or at rest i was able to achieve 436/415 uping my 3d mark5 to almost 3800

what do you pros think of all this?


well it works, im showing 12 pipes now, running benches as we speak.

Wow, nice job.

I looked into this back around august for a friend with a M18 that was capable of a high overclock. We both thought it was strange, Ive dealt with mobile 9800s before that were poor overclockers. So I looked into possibly being a mobile x800, but found very little credible information. At the time all I was able to come up with was guess work. It was discussed that certain cards would be moddable, but it was not all revisions, and like you said, some specific production weeks have a high success rate.

Im not saying its impossible, im saying if you dont do your research, dont even bother. I am happy to see how far you've looked into it so far, just keep on the same path and then come back and teach me somethin

:P I'm sorry :P

lets see some 03 benchies

wow man thats freaking sweet. i had no idea.

did you have 6 vertex shaders as well?

not too sure, im new to overclocking/modding and am still learning about the proper pc terms for different hardware components, etc. i still dont get how some unlock to 16 and other 12.

can the 9800 mobility really be unlocked to have more than 8 pipelines? this forum thread is the only search result I found about this. also... i was wondering where i could find typical overclock results for this chip so I don't push it too far

thanks

here ya go


good luck. NB forums has alot of info on this.