The 5090 adds 8 GB of memory (32 GB vs 24 GB) and much higher memory bandwidth. That matters for larger models. The 4090 is still very capable and often cheaper second-hand.
Some store links may earn KERNVAULT a commission on qualifying purchases at no extra cost to you. Disclosure
Standalone componentNVIDIANVIDIA GeForce RTX 5090
- Memory
- 32 GB GDDR7
- Interface
- PCIe 5.0 x16
- TBP
- 575 W
0 exact listings · 6 searchesPrice not verifiedPrices set by merchants1. NVIDIA GeForce RTX 5090
Pick for larger models and longer contexts; budget for a 1000 W+ PSU.
- Memory: 32 GB GDDR7
- Interface: PCIe 5.0 x16
- TBP: 575 W
- Standalone componentNVIDIA
NVIDIA GeForce RTX 4090
- Memory
- 24 GB GDDR6X
- Interface
- PCIe 4.0 x16
- TBP
- 450 W
0 exact listings · 6 searchesPrice not verifiedPrices set by merchants2. NVIDIA GeForce RTX 4090
Pick if 24 GB is enough and you find a good price.
- Memory: 24 GB GDDR6X
- Interface: PCIe 4.0 x16
- TBP: 450 W
Standalone componentSeasonicSeasonic PRIME TX-1600 ATX 3.1
- Output
- 1600 W
- Efficiency
- 80 PLUS Titanium
- Connector
- 12V-2x6
0 exact listings · 6 searchesPrice not verifiedPrices set by merchants3. Seasonic PRIME TX-1600 ATX 3.1
Headroom PSU if you plan two cards later.
- Output: 1600 W
- Efficiency: 80 PLUS Titanium
- Connector: 12V-2x6
- Used 4090 listings vary widely; check seller ratings and return terms on the marketplace.