x600xt vmods anyone have it

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...