Radeon X800 Non-Pro/X800 XL/X850 Voltmods

[Tijgert]

[stepping up to the plate] Pick me pick me!!

I'm volunteering to destr.. eh.. experiment with my resistorless Club3D X800XL

Just tell me what to do in the utmost detail and we'll see what this puppy can do.

 

[Tijgert]

I see several pictures of parts only, but no pictures of the whole project.
What exactly did you do?

 

[Tijgert]

Ah... interesting. Just to check if I understand completely: the lower resistorless island would be the ground and it's senseless to try and put a wire on another tiny island so close to the other if you can just hook it up the ye olde ground of the backplate, right?

Will you leave it at 0.02v difference or do you plan to ramp it up later?

 

[Tijgert]

It would be very handy to know about the other soldering points if there are others that are grounded.
It would reduce the number of possible foobars when using liquid metal on tiny tiny surfaces.

Oh... and I volunteered my resistorless x800xl for experimenting... but this offer expires once the watercooling is in place, I won't take it all apart again.

Please tell me what to do...

 

[fire113]

Watercooled ???


Yes

http://www.salzgitter-net.de/hgs/sommerfertig.jpg

cu fire113

 

[fire113]

Watercooled ???


Yes

cu fire113

 

[Unregistered]

Plsss

If i understand, there is no solution for resistorless PCB so pls find it or i kill my dad I want at least 450Mhz on GPU ...

 

[danikd]

Help PLS

VDD PMod done, 2.4V - scanning with atitool - only 547Mhz ( normal 2.02V - 544Mhz ) ...
Where is prob ? mem with heatsinks from Zalman VF600 ... they are hot, so voltage is realy higher then normal ... i have only VDD mod done, not VDDQ ? Any sugestion ? THX

 

[Urlyin]

VDD PMod done, 2.4V - scanning with atitool - only 547Mhz ( normal 2.02V - 544Mhz ) ...
Where is prob ? mem with heatsinks from Zalman VF600 ... they are hot, so voltage is realy higher then normal ... i have only VDD mod done, not VDDQ ? Any sugestion ? THX

You need to do the VDDQ as well ...

 

[danikd]

Thx

THX for your reply and pls any recommendation for vddq and vdd volts ? In article is for VDD cca 2.45V but for VDDQ nothing ( only stock voltage ). Thanx again.

PS:Sorry for my ENG language

 

[Urlyin]

THX for your reply and pls any recommendation for vddq and vdd volts ? In article is for VDD cca 2.45V but for VDDQ nothing ( only stock voltage ). Thanx again.

PS:Sorry for my ENG language

You may want to run the VDDQ .03v-.05v higher than VDD ...

 

[fire113]

hi

@ Urlyin

I have a x800xl/club 3 D/1,6ns samsung 256mb
??? can I use the same voltage (the article) for it on vdd and vddq ???

I went up to ~1,75 V on vgpu to hit ~510 on GPU, on VDD ~2,1V and VDDQ was a little lower ~1,98V. I get ~621 on ram. I won´t use more volts on VDDQ because I not sure with it.

kind regards fire113.

 

[Mussels]

Someone that have done testing, can poste a table Resistance----->VOLT ? Thank You

we cant, its different for every card.

 

[Mussels]

neighter a "range" ? starting resistance, starting voltage. etc etc

i beleive some were mentioned in the original article, and i know i mentioned my numbers a few pages back.

 

[Urlyin]

neighter a "range" ? starting resistance, starting voltage. etc etc

LMP all you would need is the default resistance and since you have done the Hardmod then you would adjust voltage with the VR... I know what you are thinking by wanting the numbers to be able to set your resistance to match a certain voltage but like Mussels said it is a little different for each card... You can use the default resistance to gauge your voltage but it will not be exact... for every 15ohms you reduce the resistance, you'll increase the voltage by .04v-.05v ... so if your default resistance was 430ohms and you reduced the resistance by 30ohms, then your voltage should have increased by .08v ... or by monitoring voltage while the card is on, turn the VR a little at a time to get to the voltage you want ..

 

[fire113]

@ Urlyin

I have a x800xl/club 3 D/1,6ns samsung 256mb
??? can I use the same voltage (the article) for it on vdd and vddq ???

I went up to ~1,75 V on vgpu to hit ~510 on GPU, on VDD ~2,1V and VDDQ was a little lower ~1,98V. I get ~621 on ram. I won´t use more volts on VDDQ because I not sure with it.

@ LMP ~40°C with wc


kind regards fire113.

 

[Urlyin]

Hi fire, think tha 1,75 it too much also with water cooling.

Do you tested OCability Vs voltage? does it always go up with vcore or you noticed a plateau?

1.75v should be okay for watercooling ... but LMP has a good point ... some cards react well with more voltage and some cores just won't ... my last XT PE would wack out to a vertical lines after I tried to oc higher than 628mhz and raising the voltage did not help. So again each card is different with the one I have now raising the voltage from 1.68 to 1.75 only got me from 630mhz to 640mhz... which does little for FPS in a game.. you'll find some cards have a sweet spot at which it performs better at than even a higher mhz ...

Fire113 I'd bump the VDDQ up a little and play some games ... Samsung memory specs state that the VDD should be higher than VDDQ ... however every ATI card I've seen the default was VDDQ higher ...

 

[12k]

Hmm, gonna get my card modded later this week...

Will 1,65v be perfect??
I use watercooling atm... BUT... Im gonna get a waterchiller soon, so It'll be a bit colder... Currently my temps can reach 53 LOAD on GPU while CPU + GPU is in "burn" mode... After 12 hours (delta max)

 

[fire113]

1.65v is ok with water You will get ~500 clocks on GPU but My temps are lower ~35-40°C under load.

@Urlyin what I ment is --> can I go up to ~2,45 V on VDD&VDDQ? with 1,6ns ram not 2.0 ???

cu fire113.

 

[12k]

I got x850XT, so hope It'll get me a bit more - 520 is stock

 

[Urlyin]

1.65v is ok with water You will get ~500 clocks on GPU but My temps are lower ~35-40°C under load.

@Urlyin what I ment is --> can I go up to ~2,45 V on VDD&VDDQ? with 1,6ns ram not 2.0 ???

cu fire113.

Fire ... with decent Ram sinks you could run at 2.45v with 1.6ns mem ... but at 2.1 you're already getting 621mhz ... bump the VDD up to 2.20 and the VDDQ to 2.23 ... will get you to at least 630mhz ... unless the GPU will go higher, then any higher on the mem wouldn't do you much good in terms of OCing ... test those settings

 

[Unregistered]

Fire ... with decent Ram sinks you could run at 2.45v with 1.6ns mem ... but at 2.1 you're already getting 621mhz ... bump the VDD up to 2.20 and the VDDQ to 2.23 ... will get you to at least 630mhz ... unless the GPU will go higher, then any higher on the mem wouldn't do you much good in terms of OCing ... test those settings

I´ll try

 

[Urlyin]

... hehe ... I saw that pic and forget it was you Fire ....

 

[Tijgert]

Cool ram coolers, care to elaborate? Who's are they?

 

[fire113.]

QUOTE=Urlyin]Fire ... with decent Ram sinks you could run at 2.45v with 1.6ns mem ... but at 2.1 you're already getting 621mhz ... bump the VDD up to 2.20 and the VDDQ to 2.23 ... will get you to at least 630mhz ... unless the GPU will go higher, then any higher on the mem wouldn't do you much good in terms of OCing ... test those settings [/QUOTE]


semms to be the max. of My card, with 2.2VDD & 2.23VDDQ I can´t get higher
went back to 2.1 VDD 2.13 VDDQ
I don´t understan the "Phase change: ~1.85V"???

what do I have to do that I can use 1.85 on GPU???


cu fire113.