X700pro volt mods?

thx :) i'll try the mod this saterday, (its late now and i'll be away the next 2 days)

could you do the same for the VDDQ?
only problem is i dont have a measuring point for the VDDQ. cant find any info on it either.

on x800 card ppl are using a 20k variable resistor for it, but here a 50k was recommended.
now i dont have a 50k but i do have a spare 20k.

i could temporaraly use a 2de 20k and put it in serial with the first and see what voltage returns i get at different resistance levels.
and if im happy with the voltage at a lower resistance then 20k i could remove the 2de resistor.

but either way i'll need a VDDQ measuring point.

Quote:

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Originally Posted by the_countess

thx :) i'll try the mod this saterday, (its late now and i'll be away the next 2 days)

could you do the same for the VDDQ?
only problem is i dont have a measuring point for the VDDQ. cant find any info on it either.

on x800 card ppl are using a 20k variable resistor for it, but here a 50k was recommended.
now i dont have a 50k but i do have a spare 20k.

i could temporaraly use a 2de 20k and put it in serial with the first and see what voltage returns i get at different resistance levels.
and if im happy with the voltage at a lower resistance then 20k i could remove the 2de resistor.

but either way i'll need a VDDQ measuring point.

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Pin 8 on the ISL6522 should be connected to the Vout of the regulator, via an inductor, so should effectively be connected to the Vddq read point (becasue at DC the inductor acts as a wire).

ok i followed your directions and VDDQ seems to be the bottem part of the component below the VDD measure point as seen here. (was actualy the first thing i tryed hehe)

*had a pic here, removed to keep post size down, same pic after editing below*

looking at the example in the ISL6522 PDF i could have figured it out myself i later realised. o well. :)

could you do the same calculation you for the VGPU?
here's the numbers
VDD
pin5 to ground 957ohm
pin5 to VDD measure point 1023ohm

VDDQ
pin5 to ground 771ohm
pin5 VDDQ measure point 779ohm

edit : found eazyer... well atleast less risky solder point for the VGPU volt mod.
i'll edit the above picture and add both VDDQ measure point and the new solder points in a minute.

edit 2 :
http://www.system666.demon.nl/x700vmods.jpg
(is the new solder point clear enough?)

hard to tell, looks like the edge closest to the SP61 chip of the SMT resistor pointed out?

-CaT

where's the vdd soldering point?
edit: for the vgpu and vdd mod it is 20k right?
btw vdd is vmem, right?

20K for the Vgpu will be ok.

For the Vdd mod: 20k between pin 5 and ground, giving a 2.4% increase in voltage at maximum resistance.

VDDQ mod: 20K between pin 5 and ground, giving a 1.95% increase in voltage at maximum resistance.

i changed the picture a bit. its now a arrow, should be clearer

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where's the vdd soldering point?
edit: for the vgpu and vdd mod it is 20k right?
btw vdd is vmem, right?

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vdd = vmem yes.

the VDD and VDDQ solder points arent on this picture. nor do i have a decent enough camera to make a one.
but if you look at the picture and go left on your card you'll see 2 relativly large chips.
pin5 on those chips are the solder points for vdd and vddq (pin 5 is the 5th pin on the bottem row counting from the right.)

hold you card as in the picture, then the right most chip of the 2 is the one controling VDD and the slightly lower chip on the left is controling VDDQ.

if you think the pins are to small to solder to you can look at pin 5 and see the trace from it going straight down. it'll go directly to a component on both chips. you can alternativly solder to that althou they are pretty small aswell.

thx again persivore
soldering iron is warming up as i type. :)

edit :
i'll see if i can make a decent overview of all the points of interest on the card using the detail shots docah has so kindly hosted on his connection.
edit2 : unfortunatly theres no straight down overview shot with both areas clearly visable
docah : if you reading this could you make one?

could you please post a picture with arrows with what to solder and where :)
what is vddq for?
could i use a 10k for any of the mods?
what should be max voltage for the memory?
dont belive really 2v is max as one wrote because i got 2.1 as standard

SUCCES!!!

with all 3 set to exectly 20K i get these voltaged

VGPU 1.87v VDD 2.18v VDDQ 2.18v
default for VDD and VDDQ was 2.1 but i forgot the measure to default voltage for the core. (anybody know the default?)

still @ stock cooling (watercooling on the way) so im still gona be pretty conservative with VGPU for the moment but i'll see how high i can clock it now.

*edit temps when ever 90C with these voltages, normaly they'd stay at almost exectly 60C under full load.
so if you want to stay with stock cooling i'd recommened putting a extra 5k ohm in for the VGPU or something.

as for max voltages.
that totatly depends on your cooling, your nerves and your modules. hard to say really.
keep a eye(or finger really) on the modules temperature, make sure its not baking.
then make sure the modules can handle the voltage.
set voltage too high and some modules could start making mistakes even on default speeds.
just increase slowly step by step and keep testing using ATItool for example.

VDDQ is the input/output voltage of the memory system. so VDD controles voltage inside the modules and VDDQ is the voltage for outside communication. they should be and stay pretty simular with VDDQ never exeding VDD.

Quote:

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Originally Posted by the_countess

SUCCES!!!

with all 3 set to exectly 20K i get these voltaged

VGPU 1.87v VDD 2.18v VDDQ 2.18v
default for VDD and VDDQ was 2.1 but i forgot the measure to default voltage for the core. (anybody know the default?)

still @ stock cooling (watercooling on the way) so im still gona be pretty conservative with VGPU for the moment but i'll see how high i can clock it now.

*edit temps when ever 90C with these voltages, normaly they'd stay at almost exectly 60C under full load.
so if you want to stay with stock cooling i'd recommened putting a extra 5k ohm in for the VGPU or something.

as for max voltages.
that totatly depends on your cooling, your nerves and your modules. hard to say really.
keep a eye(or finger really) on the modules temperature, make sure its not baking.
then make sure the modules can handle the voltage.
set voltage too high and some modules could start making mistakes even on default speeds.
just increase slowly step by step and keep testing using ATItool for example.

VDDQ is the input/output voltage of the memory system. so VDD controles voltage inside the modules and VDDQ is the voltage for outside communication. they should be and stay pretty simular with VDDQ never exeding VDD.

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lol, then something is seriously screwed with mine vddq, vdd is 2.032 and vddq 2.3
edit:my vgpu is 1.4v stock so 1.87 seems really high

yup i just realized that. i removed the VGPU mod and it reads about 1.36V now.
lucky for me i bought a extra 20k resistor for use with the VDDQ, but since i wont need it for that now i'll use it as extra for the VGPU.

dus your X700 have DDR1 or DDR3?
mine had DDR3. ddr1 has different voltage requirements.

Quote:

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Originally Posted by the_countess

yup i just realized that. i removed the VGPU mod and it reads about 1.36V now.
lucky for me i bought a extra 20k resistor for use with the VDDQ, but since i wont need it for that now i'll use it as extra for the VGPU.

dus your X700 have DDR1 or DDR3?
mine had DDR3. ddr1 has different voltage requirements.

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im 90% mine has ddr3 how to check that?
edit: i got ddr3

I'll check my maths for the Vgpu mod

maybe the other solder point i used isnt exectly the same as pin4 eventhou its the same when the power is off?
could that acount for the difference?

Quote:

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Originally Posted by the_countess

maybe the other solder point i used isnt exectly the same as pin4 eventhou its the same when the power is off?
could that acount for the difference?

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If the point reads 0 ohms between itself and pin 4 it should be connected when power is on and off. I'm thinking that the problem could have been due to resistance from other components because you were getting different reading when the multimeter probes were different ways around.

could someone pls explain to me why my vddq is higher than my vdd?

not really snowman

was the default that high aswell?
check solder points,(measure from the solder point to the pins next to it for a short) check the resistance on the trimmers (you'll need to disconnect them from the card to do that thou) did you set the trimmers to exectly 20k befor you solderd them in? if you didnt do anything they'll be at 10K most likely.

i added a extra 20k resistor to the VGPU and now i got 1.6V on the core.
still pretty high but a lot more reasonable.
a 50k trimmer should probably be the recommendation from now now for the GPU.

temperature with stock cooling goes up to 71C (default was 56C) under full load.
but it dus work. 530mhz core (default 425mhz) works now artifact free where it would crash instantly befor. (got to 490mhz befor vmod)

hehe use a 50K VR for vgpu :) *slaps persivore on the ass* we did it bro :)

-CaT

i havnt vmodded it yet

so 50k for the vgpu, would that work on the other solder point to?

yes

-CaT

Quote:

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Originally Posted by crotale

don't you think we should advice the first person who would like to try it to start with 100k VRs instead? It's better to be on the safe side.

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:cool:

crotale > persivore :P

-CaT

and then 20k for the vdd, if i do vdd do i have to do vddq or is it no affect ust doing vdd?

edit: from pin 5 of ISL6522CB to ground with a 20k between?

and then 20k for the vdd, if i do vdd do i have to do vddq or is it no affect ust doing vdd?

edit: from pin 5 of ISL6522CB to ground with a 20k between?
if i use a 10k for vdd im gonna have 2.2v to start with if the resistor is turned to 10k and standard is 2.1, right?