RTX 4090 48GB upgrade specifications
Spec
Stock
Upgraded
Memory capacity
Memory type
Memory bus
Bandwidth
Modules
Module manufacturer
GPU core
Power draw
Form factor
The board
The donor board is the latest 3.0 revision of the 48GB clamshell design, the most refined version of the board to date. It ships as a 2-slot blower (turbo) card, the form factor built for stacking several cards in one workstation or server chassis.
The memory
12 additional Micron D8BZC modules are fitted alongside your original 12. Every module on the finished board is tested.
The clamshell design
The upgrade board carries memory on both faces: 12 modules on the front, 12 on the rear, sharing address and data lanes in the configuration the memory was designed for. Your original 12 modules transfer; 12 more complete the set.
The VBIOS
The card runs completely stock: stock clocks, stock power limits, stock behaviour everywhere else. No overclock is applied, nothing is pushed past specification.
Power delivery
The board's power stages carry substantial margin over the 450W the core ever asks for. The memory rail is similarly overbuilt. Nothing in this upgrade runs close to a limit.
Who this is not for
We would rather tell you now than after you have shipped a card.
- Gamers. Games do not use 48GB of VRAM, and frame rates do not change.
- Sim racing, flight sim, video editing rigs. Same reason.
- Anyone whose models already fit comfortably in 24GB. Check the fit table first.
- Cards under warranty you want to keep. The upgrade replaces the board, and the manufacturer warranty does not survive that.
- Quick turnarounds. The protocol takes the time it takes, and the queue is real.
Still sure? Then you are exactly who we built this for.