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Ok, pin 5 is the actual output for the RT ICs.
There is nothing else really. Resistance between pin 1 and a ground is If the resistance between 13 and GND is ohms, then a 1K VR is gonna lower resistance by a solid 60 ohms, which may be to much to start with since we are shooting in the dark right now.
Odd pcb layout vmods. Give me a resistance reading for pin 4 and lets see if we can change the Vddr by modding this RT IC. Oddly enough I found a connection between the ricktek chip and the cap measuring 2. BTW HF, this is a not a ti My pop has the camera so I can’t take any at least not tonight. We need to make sure its Vddr and not Vddq. Well, nothing else to do but give her a try then.
Keep a good eye on the voltage as you adjust the VR.
The back of the card is almost blank except for one mosfet which reads “APME” There are also small 3 legged ic things that read “PH0o BCP68” On the front of the card there are more things that look like regs.
Got some pics now. I feel for ya tho: If possible, please check the voltage on 14 and post that. Those are all the ICs on the board. Just odd the datashest is tied directly to that cap. Then do the connectivity test between those points and pins 1, 7, 8, and I found connectivity between pins 13 and a cap on the back of the card that reads 2.
IRF7413 Datasheet PDF
If you dont t7413 an increase after turns, then I would stop and we need to take another look at it. Sounds like the vdd voltage right there. I would start with a 5kk VR just to be safe.
Pin 13 is the inverting input for output pin Anyone make sense of that one? Well I looked over the datasheet and which pin do you think is likely to be it?
The card is a pro I just got back from rma and it doesn’t look anything like the one I had, layout wise datashee least. I’m almost sure that the 2.
Do a resistance between 13 and GND and post what you find. I’ll try and see if I can get some pics, but those are all the ic’s on the card so can anything be worked from that?
F pdf Datasheet P1 Part Num IC-ON-LINE
I wanna try and find some volt mods for it. Once we figure out which output is supplying the Vddr and Vgpu, we can try modding the inverting inpout pin each output pin. I dont recall what the baseline Vddr is for the cards. Those are the outputs. The LM chip is prob controlling either Vgpu datsaheet Vddr. If Output Pin 1 is supplying Vddr, then we try modding to pin 2.
That sounds a bit low for Vddr, thats probably vddq.