Does anyone have any of them.
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Does anyone have any of them.
Post some pics of the back of the card.
ok iw ill in the mornng
Time to bump the thread.
A few of us have a competition running in the x600xt category, and some help for Vmods would be greatly appretiated!
If no-one can find any I guess I'll have to try my best to locate it meself :)
If you can give us the pics then we can work it out.
Chances are it will be similar to another card of the same generation.
Bump and just did some searching I am not sure if the pics need to be closer or not.
Front of card
Back
If others needed I'll try to snap some tomorrow night. :)
Here is my card. Its a refference BBA card so the layout should be defacto the same on most cards. If you want a more detailed picture please send me a PM, we are currently at least 3 people who would like the mods :)
Back of card
Front of card
Note the National Geographic, that was an excellent issue :rolleyes::D
Can you tell me what is written on the chips I have circled please.
ISL6522CB
P349BLZ
All are the same ;)
Can you check the voltages at pin 8 on each of the ISL6522's, as I've marked in this picture.
Yeah, I will do so - I need to get a finer tip though, the one I was using was too big I think.
Any updates on these vmods I could sure use em =)
(from the other X600 modding thread)
The 1.07v looks like Vgpu, the 2.62v is probably the Vdd and 2.26v is Vddq.Quote:
Originally Posted by Melx
Can someone check the resistance between the points I have marked and ground please (you can check resistance with the power off btw).
now, new values, multimeter battery was allmost dead, 9v to 7,5v
left corner - 2,62v & 1,78kohm
up right - 2,79v & 60,2ohm
down right - 1,26v & 3,4ohm
Were those resistances taken between the pin I marked in the first post (one of the outside pins), or were they taken from the pin I marked today? Some of the readings look a bit low to me.Quote:
Originally Posted by Melx
i used this pic
http://tom.drunken-student.co.uk/mods/David%20019.jpg
Sorry, I forgot to attatch the picture :stick:
I've attatched the correct picture now :)
what i measure, resistance ?
Yes, check the resistance. Can you see the points that I marked ok? It should be pin 5 that I marked.
all are pin 5 ok ?
yea, all are pin 5 :)Quote:
Originally Posted by Melx
left corner - 5,80 kohm
up right - 5,78 kohm
down right - 5,76 kohm
+- 0,01 :rolleyes:
Those values are more like what I was expecting :)
For all of the mods, try putting a 100k VR between pin 5 and ground.
Note: XS owners and members will not be liable for any damage caused to you or your hardware, neither can be liable for any breach of the warranty.
hmm, if i want gpu mod then i but between 1,26v and ground ?
what is vr, some sort of resistor, sorry, im dumb.
VR=variable resistor :)Quote:
Originally Posted by Melx
You need to put the variable resistor between pin 5 (the pin that you measured the resistance from) and ground. I can mark it on a picture for you if you need me to :)
ok, i mean between this chip pin 5 what give me 1,26v and ground for gpu mod ?Quote:
Originally Posted by persivore
amm, 100 kohm is max resistance ? it give me max v's and if i lower resistance, v's will drop, ok ?
Pin 5 on the chip is feedback - putting a 100k variable resistor between this pin and ground will trick the regulator into giving out more voltage. To increase the voltage that the regulator gives out, you decrease the resistance of the variable resistor. Pin 5 was the pin that you measured the resistance to be ~5.8k
ok, 100kohm resistor increase volts or is it 1:1
is there possible somehow calculate how much 90kohm :rolleyes: will give ?
yes, but it can be slightly complicated, and doesn't always give very accurate results, and you will need to know the resistance between pin 5 and the voltage that you are modding's read point. You can use Vout=1+(Rfb/Rg)*Vref, where Rfb is the resistance between pin 5 and the read point,Rg is the resistance between pin 5 and ground, and Vref is the internal reference voltage for the regulator (I told you that it was slightly complicated ;))Quote:
Originally Posted by Melx
I think a 90k resistor will give about 0.1v over stock, but I can't be sure.
ok, you think that 100kohm resistor wont blow my card up :p:
mb i connect pin5 and ground with plain 100kohm resistor and then read v between pin8 and ground, then i see something for starting :rolleyes:
I'm 99% sure that a 100k resistor won't kill the card. You can use pin 8 to check the voltages, but they might be about 0.02v under the true voltage reading.Quote:
Originally Posted by Melx
deem, i think i read wrong pins resistance, you marked those pins other side, i did reading from side where i read volts :nono:
you think yellow pins on this picture ?
I needed the resistance from the pins that you've marked in yellow. Can you re-check the values on the yellow pins?
Ok, Thanks for the readings.
Vgpu (1.26v) mod - connect a 20k variable resistor between pin 5 on the Vgpu regulator and ground.
Vdd (2.79v) mod - connect a 50k variable resistor between pin 5 on the Vdd regulator and ground.
Vddq (2.62v) mod - connect a 20k variable resistor between pin 5 on the Vddq regulator and ground.
ok, and volts i read between pin8 and ground like allways :)
what is vdd and vddq, some sort of memory vmods ?
yea, read the volts at pin 8.
Vdd is the main Vmem mod, and the Vddq mod is to increase the I/O voltage that the mem chips use (although it doesn't usually have much effect and can be sometimes be dangerous for the card)
hmm, seems that it works, but my multimeter is going crazy when i read volts after vmod, i think its prob of this cheap :banana::banana::banana::banana: crapy multimeter :stick:
i soldered pin5 and ground with 19kohm resistor and got +10MHz for gpu :rolleyes:
A 19k resistor will probably give an overvolt of about 0.06v, so a 10mhz gain is quite good for that IMO.Quote:
Originally Posted by Melx
ok, hope this pic will help if somebody need vmod in future ;)
X600 XT Vmods
persivore maybe you can help me you vmod god ;) I have a MSI version of the x600xt I dont have the same IC's Melx has so I dont know where to start, also if a pencil mod is doable that would be handy here are a couple pics of the card.
http://img225.echo.cx/img225/5460/front3rm.th.jpghttp://img225.echo.cx/img225/7041/back6wa.th.jpg
Can you tell me what is written on the 2 chips I have circled. The chip on the left will probably be an ISL6522CB for the Vdd/Vddq.
Edit: forgot to attatch the pic.
ISL6522CB is top left and the top right is T8964 MS141
Can you check the voltage at the point I have marked. I'm still looking for the datasheet for the other chip.
Sry persivore I sent the card back to newegg they posted the wrong specs for the card and am currently trying to pick out another one, the other chip you cant find it was the number on the sticker probuably why you cant find it and didnt want to rip it off and make it look too obvious when going to RMA it.
Hi persivore my card is very much like the first but the one chip is not there. I labeled the chips you might need but found you may not be able to read it. :( If you want I'll relabel it. :)
http://img93.echo.cx/img93/1150/picture2930qf.th.jpg
It looks like one regulator is being used for Vgpu, and the other is probably used for both Vdd and Vddq. Can you check the voltages at the points I have marked here please.
Well I tested the points you showed and got 0V on both chips. I tested the pins on the exact opposite side and had some readings. I marked the drawing w/ the pins I checked and their readings. Thanks. :)
http://img295.echo.cx/img295/729/pic...ings2rw.th.jpg
It looks like the Vgpu regulator is the same as the first card, so the same mod should work for that (connect a 20k variable resistor between pin 5 on the Vgpu regulator and ground).
The other regulator will probably be powering Vdd and Vddq (unless there is another regulator on the front of the card). The Vdd mod on this card should be the same as the one on the first card, but to check, can you check the resistance between the point I have marked here and ground.
I believe there is another reg. on the front. When I get home I'll check the res. as you showed. Now on the cards how are the pins numbered does it go as follows?
7,6,5,4,3,2,1
14,13,12,11,10
Also do you know which pin on the reg. would be the ground leg? I think it looks neater modded right from one pin on the reg. to another instead of jumping to ground in the front of the card. If you have any links to pages on chips or where I might research a bit I would appreciate it. Thanks so much for your help so far. :toast:
See the pic I attatched to see how the pins are numbered. Pin 1 will be marked with a dot by the pin. Pin 7 can be used as a ground point. The datasheet for the ISL6522 regulator can be found here
The reading for the pin indicated is 0.5-0.6 ohms. :) Thanks for the sheet and diagram.
Are you sure it was 0.5ohms and not 0.5k.ohms?
The pin you marked is pin 7. Here are the readings to ground:
1) 51.2K
2) 3.273K
3) 5.27M
4) Open
5) 387.2
6) 10.22K
7) 0.3
8) 274.6
9) 274.8
10) 4.33M
11) 0.7
12) k/m
13) 43.34k
14) 58.8
Sorry, I meant pin 5. I'm going to start looking at the datasheets before I post in the future :p:.
For the Vdd mod, connect a 10k variable resistor between pin 5 and ground (pin 7)
Thanks you very much. :toast: . In the future are read legs always on pin 8 and mods to 5 & 7? Also if you don't mind me asking how do you calculate what size vr to use?
On the ISL6522, the mod will be between pin 5 and 7, but it will be different for other regulators. Pin 8 will only give an approximate voltage reading, and will probably be accurate to about 0.02v.
To calculate the size VR, I use the resistance between the feedback pin (pin 5 on the ISL6522) and ground, and multiply it by 20, and round that up to the nearest commonly available variable resistor value.
Very cool thanks! I have started to mod it. I did have a 10K and 20K vr here. I think I will also be mounting a molex or something for read points. I'll post a pic later today. :)
Sorry for the double post.
persivore: The mods seem to work great. I didn't take readings but with 1 1/2 turns on my vgpu mod I gained an extra 15-20 mhz. on air. You mentioned they are referance points on the regulators where I measured voltage. Should I be doing voltage readings from another point? I tried using the nail polish I use to cover cards to stick the vr's to it but once I grab some crazy glue to hold the vr's (unless someone recommends something differant) down I'll take photos. :)
Good to see the mods work :)
If you want to find alternative read points, just probe around capacitor legs until you find a voltage which reads what you expect, and check that it changes when you change the variable resistor.
Crazy glue will work fine for sticking the VR's down.
Well decided to go on the back of the card for reads. Once again I wanted to say thanks for helping me complete my first mod and to get basic understanding of how a mod is figured out. Here's my final card. The blue on the solder joints is nail polishto seal it up a bit (and hide some of my nasty solder joints :) )
http://img12.echo.cx/img12/107/picture2973gg.th.jpg
nice mods harleybro....just be careful runnin vmods on that zalman heatpipe cooler ;) I got the dual heatpipe one. I may try and upgrade my cooling so i can push the volts when I get my card back :)
Any way to find OVP on this card what it kicks in at? What would be the symptoms of OVP holding me bk?
I would belive it to be when the voltages starts to dropp even thoug you increase it :D
Hmm I've done Vgpu, Vdd and Vddq mods, and I ended up at 600mhz GPU Clock, with 1.6Vgpu, but when I turned on my computer the next day, Vgpu was at 1.55V instead of the 1.6V I left it at, the night before...
I've tried a lot of different voltages between 1.56V-1,61V but It resets to 1.54/1.55V everytime the computer has been turned off... (I'm beginning to be scared of turning th VR)...
Can anyone explain this odd behaviour? :confused:
Card is an Asus EAX600XT...