Thermal pads upgrade?

[Agosto]

Hi all,

my Sapphire RX580 Pulse keeps getting random memory errors in games and I suspect the cause to be high VRAM temps. Core temps never go over 69°C peak; the card is undervolted and slightly underclocked, but the errors appear even at stock settings. Sadly I have no VRAM sensors to check, however the errors seem to increase over time during gaming: very few at the beginning and increasing faster over time, up to like 1000-2000 per hour. My memory clock is obviously at stock, I tried lowering to about 1950 with no tangible improvement. I'm using older 18.9.3 drivers, I didn't upgrade since I have an older version of windows 10 and I'm afraid of making it worse by updating. I'm also going to format my pc and update to the last version of W10, probably this weekend, in order to see if there's any difference. I bought the card used, so no there's no warranty (thus no RMA)

Could I solve this issue by changing thermal pads on VRAM? In this case, does anyone know what thickness should I get for my card? And does putting pads between the PCB and the backplate help in any way?

Moreover, can anyone suggest some good pads to buy? Are those sold by EK any good, for example? Please, don't say "just get Fujipoly ones" because the cheapest pieces are like €45.

Thank you in advance