9800Pro mods

[Happy^]

I need some good guides how-to-make mods on 9800Pro.

Ive seen some, but i cant really find them anymore :confused:

I would be happy (oh I am? damn) if someone would give me some links :)

Thx

[Happy^]

Come on! This is one of the biggest sites with that stuff, and not even one person can answer me :/

[Coot]

http://www.3dmaxx.net/articles/9800vmod/

[Happy^]

Thx :D N1

[Happy^]

http://www.3dmaxx.net/articles/9800vmod/images/ddrvmod.jpg

Can I use the pin on the IC istead of the spot @ the PCB ??

[Happy^]

No answer ?? great site :rolleyes:

[KODE]

Hi,

Yes you can use the pin as an alternate point for both volt mods (Vcore/VDDR) Like I did, works perfect.

[Happy^]

Can't really use the guide - my gfx has a diffrent layout :/

[Eru]

wich one do you have?

[Happy^]

Tyan 9800Pro :/

Its a bit irritating :(

[Happy^]

Now I have a Q.

How does this look ??

http://www.edgarbaba.frac.dk/tyan.jpg


Thx

[Hell-Fire]

Regardless of the layout of the pcb, if you have the same voltage regulators, you can follow the same guides.

Not to be rude, but be more patient when you expect people to help you. Not a good thing to blast the site just because you didnt get your answer lickety-split.

Also, the Search link up top is powerful for this site. Just stick in 9800Pro AND Vmod, just like that and see what you get.

In the meantime, here ya go:

Written by a XS.org member:
http://www.fastlanehw.com/reviews.php?action=view&revid=74

And yet another one:
http://ocfaq.com/article.php/overclocking/voltmods/56

Imagine that, another one:
http://www.madshrimps.be/?action=gethowto&howtoID=42

Ummmm:
http://www.xbitlabs.com/articles/video/display/extreme_10.html

Threads here about it:
http://www.xtremesystems.org/forums/showthread.php?s=&threadid=23359
http://www.xtremesystems.org/forums/showthread.php?s=&threadid=18885
http://www.xtremesystems.org/forums/showthread.php?s=&threadid=13679

[andyddr]

Does anyone know what the chip under the small black heatsink is on the 9800PRO? I was trying to remove the HS to replace it with a copper one and pulled the whole thing off by trying to hard. So anyways I was thinking maybe I could get a different chip to replace this one which would allow better voltage. Anyone?

[Happy^]

Thx alot Hell-Fire !! :D

The only problem is that I have two ICs in the upper left corner, and I don't know witch of them I shall use for the Vdd mod :(

And what is VREF and VDDQ used for ?? And do I really need them ??

[bachus_anonym]

look at the first pic at ocfaq link that Hell-Fire gave you and u will find the answer...

EDIT: actually, it looks like your R9800P has layout of R9700... ocfaq has also mods for it

[andyddr]

Anyone?

[Happy^]

bachus --> I think your'e right :D

http://ocfaq.com/article.php/overclocking/voltmods/57

Do I really need the VREF mod ?? Can't I just make the VDD mod ??

[LikwidKool]

andy I wish I could help, but alas I have no idea. Just give it some time. Maybe Holst knows.

[andyddr]

Thanks...I`ll PM him for a reply.

[Holst]

I think the chip you have pulled off is a International regulator 3057... same as 8rda+ VDD mod... but let me check a few things first. (that part numbr is from memory, so i may be a little wrong)

Its not uncommon for people to do this sort of damage... although it can be easily fixed if you can get a new chip (or recover the old one)

[andyddr]

Thanks Holst. Do u think by putting a different higher voltage regulator in it`s place I`ll benifit from better VGPU or VDD in any way? I have been able to solder it back on and add a copper HS. Now getting around 10MHz more on mem and core but don`t know if it`s soldering (resistance) or HS that`s improved MHz.

[Happy^]

Holst --> How about the VREF ?? Do I really need it ??

[Holst]

Vref may gain you a little ammount but it is pretty risky.

I have used Vref to gain 5mhz on the memory for a few benches but id allways remove it for day to day use.

Unless your going for a new high score then I wouldnt bother as its one of the more risky mods you can do.

[bachus_anonym]

i read somwhere that vref is not really neccesary... coz once u do vddq and raise voltage vref raises automatically to 2xvddq... i may be wrong though...

[Hell-Fire]

I would only do the Vddr and Vgpu.

I am doing all the mods, as I dont want to have to remove the card later to do them since I am putting ye ole pelt on her and removing the block and the lexan thats holding down the backside neoprene is a pain in the arse.

I will only run the Vref and Vddq when benching, then remove it.

As far as whether there is a linear replationship between raising Vddq and Vref together when Vddq is raised, I am not certain on that one. Better ask Holst. The spec voltages would certainly imply that, but dont let that be your guiding point. Once I do the mods, I will only raise the Vddq and see if the Vref follows suit.

Also, Vref should be half of Vddr.

Happy^, the best way to determine which IC to mod for Vddr is by checking the voltages for it. Typically the Vddr is at the top of hte card and has a voltage of 2.9v or so. Note that Vddq also sits around that value, but on most pcb layouts, the Vddq IC is on the bottom of the card. Also, in that pic you posted, they are using a 50K it appears, and that is a VR typically used for either Vddq or Vref.

[bachus_anonym]

i'm trying to figure out vref myself coz i have also 9700P layout of R9800P... but just took a picture.

http://www.speakeasy.org/~michasmisiek/R9800P/r9800p_marked.jpg

Malves told me where vddq chip is and i think vref is where i marked it... those are both IR3037A chips.

Hell-Fire, that's what i thought about that vref and vddr thing... on my card stock was 3.36 vddr and 1.40v vref... smells like vref mod should help in my case...

also, do u guys think that using 20k trimmer set to about 13k for vddr would allow me to bring vddr close to stock 2.9v. after the mod i got 3.44v at trimmer maxed out...? (i asked that question somwhere else but didn't get answer...

[Malves]

You are right, bro. That's the Vref chip. http://www.malvescorner.com/r97.htm

Raising Vddq won't do anything to Vref.

BTW, with vddq and vref I only gained about 6mhz w/o artifacts in 3dmk1 on the memory, with the same VDD.

[bachus_anonym]

thanx Malves,
in my case i need to do either vref and set it to 1.72v (not sure if it's a good idea to raise it this high) or somehow bring my vdd lower than 3.44v, where i'm now... that's why i think i should redo my vdd mod with 20k trimmer... that would be third time already :D

[Malves]

also, do u guys think that using 20k trimmer set to about 13k for vddr would allow me to bring vddr close to stock 2.9v. after the mod i got 3.44v at trimmer maxed out...?

No. lowering the resistance will just raise the VDD even more. To do that, you'll have to replace a resistor on the mobo with a higher resistance.

[bachus_anonym]

that suxx then... could flashing my R9800P with Gigacube 9800P Bios or maybe 9800XT Bios help on this... ?
i really need to figure out what to do to get back to almost 400mhz mem without artifacts after i did vgpu mod...

[Malves]

Have you tried removing the mods and see if you get your 400 back?

BTW, I remember your mem being 3.35v at default, right? If you wanna keep that with the vmod in place, then just use a 20k trimmer instead of a 10k.

[bachus_anonym]

i'm sorry but i seem to be little confused now...


Originally posted by bachus_anonym
also, do u guys think that using 20k trimmer set to about 13k for vddr would allow me to bring vddr close to stock 2.9v. after the mod i got 3.44v at trimmer maxed out...?

Originally posted by Malves
No. lowering the resistance will just raise the VDD even more. To do that, you'll have to replace a resistor on the mobo with a higher resistance.
or

Originally posted by Malves
BTW, I remember your mem being 3.35v at default, right? If you wanna keep that with the vmod in place, then just use a 20k trimmer instead of a 10k.

would that mean that after i put, say 20k in place of current 10k for vdd and set it to somwhere close to maximum resistance (maybe 15k) i will be able to reach "true" stock of 2.9v for memory on R9800P ?

[bachus_anonym]

removing all mods takes me back to 430/385 artifact-free... i really think that there must be something wrong with voltages on this card coz before mods "stock" was:

vdd - 3.35v
vref - 1.40v ??? (not 1/2 of vdd)
vddq - 2.80v
vgpu - 1.71v

[Malves]

All right. Your VC default mem is 3.35v, right. That means Sapphire used a resistor with lower resistance than, say ATI did on their board.
Now, unless you replace that stock resistor with one that has a higher resistance, your minimum mem voltage will be 3.35v.

When you do a vmod, you may have a slight raise on the voltage. So, if you use a 20k trimmer instead of a 10k trimmer, that slight raise will be less to none. But your default voltage won't change even if solder a 500k trimmer, because of the stock resitor on the board.

[bachus_anonym]

gotcha :D all clear now...

[bachus_anonym]

sorry bro, one more question i let u go ;) but that that vref not being equal 1/2 vdd on my R9800P bothers me a lot...

should i do this vref mod and raise it to 1.72v (1/2 of my current 3.44 vdd) to get that vref=1/2 vdd right where it's supposed to be?
i just want to keep that new core OC of 470ish (1.75 vgpu) without lowering mem OC to 350mhz to get no-artifacts...

[Malves]

:) I'd rahter not answer that. Like the others said...vref is kinda risky. So, you may end up with a fried board or not. It's your call here, bro. Sorry! :(

[bachus_anonym]

ok, i understand... thanx for all help

[Happy^]

What is the diffrence of Vddq and Vdd ??

Can't I just make ONE mod so my ram can get a little more juice ??

[bachus_anonym]

Originally posted by Happy^
What is the diffrence of Vddq and Vdd ??

Can't I just make ONE mod so my ram can get a little more juice ??

after i digged through the Xtreme Graphx mods i found two guys that had probs with artifact-free operation after they did vgpu mod. it seemed to be mainly 9700P issue and even doing vdd mod didn't help... since my card (and i think yours) share same 9700P layout and have same IC chips (IR3037A instead ISL6522) i figured that there must be sth wrong here with voltages on those 9800P transplants.
i will flash my card with gigacube R9800P bios and maybe R9800XT today and see if there's any difference...

EDIT: flashing to Gigacube R9800P bios changes nothing except for setting default 400mhz/351mhz...

[bachus_anonym]

just removed vgpu mod again with vmem left on... set to 380mhz/400mhz, fired up 3DMark... after 2 mins felt smoke...

my beloved R9800P...

R . I . P :mad:

[Hell-Fire]

Man. Sorry to hear that.

Making me reconsider doing the mods at all.

[bachus_anonym]

well, what exactly happened was that after i removed vgpu mod and felt that smoke, turned it off... then boted to windows fine and worked there for a while... but any 3d app just ended up with totally corrupted screen...
so i decided to remove vdd mod and accidentally pulled whole trace together with solder joint... that just sucked...

well, i guess i'll be getting new R9800P tommorow :D

[Happy^]

Bachus --> RMA ;)

Tomorrow I will get a Shuttle mobo :D I guess :/

[Hell-Fire]

Nothing wrong with a new 9800Pro. =D