Configuring VRAM Straps resistor Acer Nitro 5 LA-H501P GTX 1070 after replacing VRAM

[kuba2102]

Acer Nitro 5 LA-H501P GTX 1070

Hi. My laptop was water damaged and many things didn't work. I managed to get it up and working but had problem with GPU and at the end it turned out to be a faulty VRAM (Hynix H5GC8H24AJR-R2c) and I replaced it with (Samsung K4G80325FB-HC25) and it worked sort of. On standard drivers I was able to play fine but once exit the game laptop thrown blue screen “video tdr failure”. When I installed gaming drivers it worked fine ok, but when was running on a battery only was giving me blue screens. I think the problems is due to a wrong Straps but I can't figure it out. According to schematics RAMCFG Straps supposed to be 0x5 (for old Hynix VRAM), but physically on the board resistors are configured as 0x2 for a slightly different VRAM, also I'm not sure if only Straps 0,1 and 2 should be configured or all straps 0,1,2,3,4 and 5. I attach screen shot of schematics in which I selected Strap 0, 1 and 2 resistors that are PRESENT on the motherboard. Also attached schematics (page 29)

Strap resistors PHYSICALLY on the motherboard:

strap0 low
strap1 high
strap2 low
strap3 high
strap4 low
strap5 low

[crazybull]

Re: Configuring VRAM Straps resistor Acer Nitro 5 LA-H501P GTX 1070 after replacing V

This board can only work with GTX1050Ti and GTX1650. But not with GTX1070. If you have a GTX1650 and swapping VRAM from Hynix to Samsung, then move the resistor from rv27 to the place of rv35. From 0x2 to 0x0

[kuba2102]

Re: Configuring VRAM Straps resistor Acer Nitro 5 LA-H501P GTX 1070 after replacing V

Hi. Thanks for your reply. Yes it's the GTX1650 I don't know why I wrote 1070 probably because I sourced the VRAMs from 1070. That's what I did i set it to 0x0, but then the VRAM is not being detected at all, in gpu-z says unknown I have also tried other configurations e.g. 0x1 detects as micron, but rest without a luck