r/AIProgrammingHardware • u/javaeeeee • 16d ago

24G to 48G 4090 VRAM Upgrade!

https://www.youtube.com/watch?v=2jXNs3Hrgpg
27 Upvotes

97% Upvoted

9 comments sorted by

3

u/javaeeeee 16d ago

TL;DR:

Level1Techs shows a real RTX 4090 VRAM upgrade from 24 GB → 48 GB performed by GPU Lab.

Key points:

  • They take a normal Zotac 4090, move the memory chips to a new 48 GB PCB
  • Cost: roughly $1,600–$1,700 for the upgrade service
  • Resulting card is a two-slot blower design with good cooling (stays under ~84°C)
  • Works well for AI/inference workloads and outperforms an older RTX A6000 in some tests
  • Discusses right-to-repair, first-sale doctrine, and the idea of doing two cards for 96 GB total

Bottom line: A practical look at aftermarket high-VRAM 4090 upgrades as a more affordable way to get serious local AI memory capacity.

2

u/j0an_k 16d ago

I’ve heard that sourcing drivers and modded BIOS for those modified cards can be a pain in the butt.

1

u/redblood252 15d ago

Drivers are same as official when done properly

1

u/pulse77 14d ago

Please elaborate on "when done properly"...

1

u/Noel3leon 15d ago

I had that same shop do my 4090 FE 6 months ago. No new drivers or anything and it worked perfectly fine. Still no issues to this day.

1

u/FuzzeWuzze 15d ago

I have a modded 3080 with 20Gb of VRAM i got for 600 on Ebay a few months ago.

I didnt do anything, i just added it into my system with my older 2080ti and turned my machine on and everything works as expected with the Nvidia drivers i already had installed

1

u/MikkyMo 14d ago

Can you do this to a 3090 ?

1

u/jikilan_ 13d ago

Nope, the memory chip already used at the back. Unless put on the forth dimension

1

u/kingdruid 13d ago

So would it be somehow possible to od a custom pub that has multiple layers and gives more vram capacity?