Radeon X800 Non-Pro/X800 XL/X850 Voltmods

[=ACID RAIN=]

Just wanted to post about the success of this mod, and also to thank the writers. All I've done is the vgpu mod, which is currently at 1.65v and passing 3dmark05 at 675MHz. I haven't found the limit yet for this voltage it seems

The memory at stock voltage hits 660 benchable, but haven't tested it thoroughly.

Seems like I've got a little gem here

 

[saber63]

just alittle confused, were using a rather large VR (100k-10k ohms) for adjusting the voltage, why not get a 0-1k ohm VR and slap it on the soilder pads that are giving me about 434ohms?

just curious
saber63

ps i love this post and the pics, mmmmmmmm pics

 

[infrared]

for the vgpu we're using a 10k - 0k VR, 10k gives slightly over stock voltage, and you just reduce the resistance to suit.

 

[saber63]

hmmmmmmm well this seems odd, im using air cooling (rather large though) and at 1.475V(1.45 loaded) i get only 52-53 degreas c thats with max oc before i think it runs out of voltage ( screen goes black) and it seems to go higher with more voltage, SO im curios to why i see a hard lock before artifacts, im coming from a 9700pro so it artifacted alot at high ocs. so um what should i do, i think it might be my power supples sucking, im not sure. should i do the igpu mod? i havent yet. i havent done any 3dmarks yet cause im lazy

im sorry if this is the wrong thread, new to this fourm, and most of these seem like there related to the volt mod.

thank you for your time

levi danzer

 

[Mussels]

X800 cards pretty much always hard locked instead of artifacting. I dont know the reason, but it happens even without voltmods.

 

[saber63]

oh ok, well that does make sense, its just alittle un called for your chugging along no artifacts, then BAM everything goes to poop.
thank you very much for that info, now i know! thank you very very much
i feel kinda like this now hehehe. btw this mod works great! i was normaly getting about 560/600 now ive gotten 596/612

oddly im giving my card 1.475 volts on air, and when i give it a load, it jumps to 1.5v!!!! but i still am not even hitting 55oC yet, so is it safe for more voltage? or not?

thank you one last time
saber63

 

[Mussels]

I cant help more here, i moved on to an x1800 a few months ago so i'm outdated on x800 details

 

[infrared]

There is no "hard lock" on the cards, If the card is crashing before artifacting, set the highest *stable* clock (as in, no black screen), and leave the 3d view open overnight. Sometimes it takes a few nights to do, but eventually the core will bed in and stop crashing. The problem lies with a faulty core, and performing a long 'burn in' can often cure the problem. Sometimes on the old x800gto2's that had the 4 pipes locked would be ok with 12pipelines, and would start crashing before artifacting when the previously unused pipelines were unlocked. The problem goes away with use.

Voltages...

Try pusing up to 1.52v, as long as the temps are ok, it should be safe enough.

 

[Mussels]

! is that true infrared? maybe i shouldnt have given up on my x800XL after all....

 

[infrared]

Yep, My x800gto2 used to crash at 560mhz, and after about a week of heavy gaming, plus leaving atitool open overnight the problem went away. I'm not sure it will work in all cases, but it's deffinatly worth a try.

x800xl, r430 core... only ~50mhz overclocking potential. I had one, the memory was good on it, but i'm glad it died tbh

Edit: come to think of it, my x800xl had the same prob when i first got it... very strange.

 

[Mussels]

i'll keep that in mind that long burn ins are a good idea for those cards then. my x800xl never OC'd well at all, it just hard locked.

 

[vudoo]

Hi. I soldered a 10K pot for the GPU. My stock voltage was like 1.403. After mod, it's 1.462. I'm turning the pot to the right and it's not changing my voltage at all. Am I doing something wrong?

 

[infrared]

How many turns is the pot? I've got a 22turn pot on mine, and it takes roughly 10 turns before anything happens, so you're probably not doing anything wrong

Don't get impatient with it, it's really easy to do 5 turns at a time between measuring, and end up frying your card when the voltage does go up. If you can, get a friend to hold the probe of the DMM to the measure point while you adjust the pot, or you can soldier a wire to the measure point like i did.

[AK]Zip:

I've had a look at your card, and i can see your prob. Looks like the points to place the VR's are there, but the measure points are no-where to be found. I'll give urlyin a shout and see if he knows where they are on that card. Hold tight bud

 

[vudoo]

It's a 15turn pot. I'm turning to the right (clockwise) and I don't see an increase in voltage. Is the pot supposed to make a click sound every 1/2 turn?

 

[vudoo]

Nevermind. I figured it out. I used the wrong "leg" on the pot. Hehe.
Got the GPU at 1.701v right now w/ WC and 2.08v VDD w/ pencil trick. Gonna see how high of an OC I can get.

 

[vudoo]

Did artifact check w/ ATI tool... Started artifacting like crazy. Hmm...
This was at default speeds. =/

 

[VRoman]

Hi everyone!
I just did an unsuccessful vddq mod to my ATI X850PRO. As soon as I set vddq to 2.3v and ran 3DMark my videocard died. Now it keeps vddq voltage at 1.0v instead of 2.1v no matter what. No picture on the screen, just a bunch of flashing squares. Once every now and then it comes back up to 2.1v for a few seconds... but I can't make it stay there. I have another identical card with missing memory chips that I can use for spare parts. Can anyone help me to figure out what needs to be replaced? I think its either the chip that I soldered the resistor to, or one of the two vddq voltage regulators located on the other side of PCB. Is there anything else that could get fried so easy?

 

[Mussels]

*whimpers in teh corner* bad luck on hte mod man, but really... i dont think swapping parts will get you anywhere. It's very rarely attempted.

Have you completely removed all traces of the mod to see what happens?

 

[VRoman]

Yes, I removed everything. You can barely tell that there was a GPU voltmod. I'll probably send it back to ATI for repair if I can't find anyone in Albuquerque who can swap the chips. Since I was using water cooling, I think there was not enough airflow over the voltage regulators and they got overheated to the point of no return.

 

[gooner45]

What went wrong with my x850xt voltmod?

Firstly, I followed all the instructions in the article correctly checked my vcore to be 1.42v and I soldered on the 10k vr perfectly. Card does not post at all now. Checked voltage and its down to like .90v now. My resistance went from 431ohms to 409 when I put the vr on. I'm so confused now.

Any advice on what might have went wrong?

I had a waterblock already connected to the card so I was good to go.

Do you guys think I"ll be able to RMA to ATI if I can get the traces of the solder off?

 

[Sasqui]

Question - the mesurement points for VDD and VDDQ as shown here:

http://www.techpowerup.com/articles/overclocking/voltmods/112/3

To measure voltage, you need two points (overstating the obvious) - where is the second measuement point? Is it simply across the capacitor?

 

[ViperJohn]

Question - the mesurement points for VDD and VDDQ as shown here:

http://www.techpowerup.com/articles/overclocking/voltmods/112/3

To measure voltage, you need two points (overstating the obvious) - where is the second measuement point? Is it simply across the capacitor?

Common ground which is where the minus side of the target caps you are metering trace to. Easiest place to pick ground up is by clipping your DVM's negative test lead to an unused I/O female adapter (where your monitor connector retaining screws thread into ).

Viper

 

[Sasqui]

Common ground which is where the minus side of the target caps you are metering trace to. Easiest place to pick ground up is by clipping your DVM's negative test lead to an unused I/O female adapter (where your monitor connector retaining screws thread into ). Viper

I thought perhaps that was the answer - Gracias, Viper.

 

[roms]

x850xt AGP

Hi

i had moded my GPU to 1,6V.
Now I will mod my MEM too. I had done this VDD and VDDQ mod, with 2*20kOhm.

http://www.techpowerup.com/articles.../voltmods/112/1

But at the mesurement points, I can`t see a raise up of the Voltage from 2V to ?V
Is this mod only for PCIe cards or for PCIe and AGP.
Has someone done this mod at a x850xt AGP card?

 

[VeDz]

i am going to revive an old thread
heh

anyway ive voltmodded my ATi Radeon X800XL 256 mb.
All of it, VGPU, IGPU, VDD, VDDQ. All pencil skills (took me 2 days to get those skills lol)

My gpu clock is running at 440 mhz with the mod :s at 1.53V. Quite weird :S
However my memory is ok i guess, stable at 582mhz.
But i think im providing too much voltage in VDD and VDDQ.
Around 2.3V each.
Is that high? risky? considering I have stock cooling only.
My temp on load runs 70+ and idle is around 42. This is one of those HP cases...so inefficient. I would get some fans but I don't know how to cut aluminum. The temperature used to happen b4 the mod as well but I think it has risen a few degrees like 4-5 since the mod.
Also, the ram chips are sorta hot underload, I would have to say as hot as the aluminum heatsink of the GPU. Is that a bad thing?

Anyway, I would like to increase my GPU mhz.
With the voltages I am at I think I should be getting higher mhz am i right?

Also for some reason i got a lower 3dmark2005 score.
B4 when i was running at 429/550 i got 5500
now 5300.
maybe its the cooling.
thanks in advance