Cloudzat GPU & Local AI Hardware Intelligence
RTX 3090 vs 4090 vs 5090 for Local AI
The RTX 3090, RTX 4090 and RTX 5090 represent three different local AI buying strategies: used 24GB value, faster 24GB performance and a newer 32GB flagship. The right choice depends on model fit, budget, power and current street price.
Compare the RTX 3090, 4090 and 5090
Use your intended model and electricity cost rather than gaming performance alone.
The RTX 3090 remains a capacity play
Its 24GB memory can be more useful than newer lower-memory cards. Buyers should account for used-condition risk, high power draw and the absence of newer architecture features.
The RTX 4090 improves speed without adding VRAM
It keeps the 24GB capacity class while delivering much higher compute efficiency and bandwidth than the RTX 3090. It still cannot fit workloads that require more than 24GB without offload.
The RTX 5090 adds a larger 32GB pool
The extra memory can move some workloads from multi-GPU or offload territory into a single card, but board power, PSU size, physical fit and purchase price are substantial.
Current price changes the conclusion
A discounted used RTX 3090 can offer strong memory value, while a heavily marked-up RTX 5090 can have poor price-per-GB despite its performance.
Current GPU catalogue
Current Amazon offers identified by exact GPU model. Use the calculator above for workload-specific ranking.
| GPU offer | VRAM | Stack | Power | Condition | Price | Price/GB | |
|---|---|---|---|---|---|---|---|
 Intel Arc A770 16GBGUNNIR Intel Arc A770 Photon 8GB OC GDDR6 2400MHz Triple Fan Graphics Card |
16GB GDDR6 |
oneAPI / DirectML | 225W 600W PSU |
New | Price Options | — | Buy on Amazon |
 Intel Arc B580WEELIAO GUNNIR Intel Arc B580 Index 12GB GDDR6 2670MHz Dual Fan Graphics Card (192-bit, PCI-Express 4.0 x8, HDMI/DisplayPort, Supports 4k) |
12GB GDDR6 |
oneAPI / DirectML | 190W 600W PSU |
New | Price Options | — | Buy on Amazon |
 Intel Arc B580TFGAJKKKKK Intel Arc B Series Intel Arc B580 Limited Edition Graphics Video Card |
12GB GDDR6 |
oneAPI / DirectML | 190W 600W PSU |
New | Price Options | — | Buy on Amazon |
 Intel Arc B580ASRock Intel Arc B580 Challenger 12GB OC & Challenger CL-650G 650W Gold PSU | Modern Gaming & Streaming Bundle |
12GB GDDR6 |
oneAPI / DirectML | 190W 600W PSU |
New | Price Options | — | Buy on Amazon |
 Intel Arc B580ASRock Intel Arc B580 Challenger 12GB OC & PRO-650G 650W 80+ Gold PSU | Efficient 1440p Gaming Bundle |
12GB GDDR6 |
oneAPI / DirectML | 190W 600W PSU |
New | Price Options | — | Buy on Amazon |
 Radeon RX 7800 XTSapphire 11330-01-20G Nitro+ AMD Radeon RX 7800 XT Gaming Graphics Card with 16GB GDDR6, AMD RDNA 3 |
16GB GDDR6 |
ROCm / DirectML | 263W 700W PSU |
New | Price Options | — | Buy on Amazon |
 Radeon RX 7800 XTPowerColor Fighter AMD Radeon RX 7800 XT 16GB GDDR6 Graphics Card |
16GB GDDR6 |
ROCm / DirectML | 263W 700W PSU |
New | Price Options | — | Buy on Amazon |
 Radeon RX 7800 XTSapphire 11330-03-20G Pure AMD Radeon RX 7800 XT Gaming Graphics Card with 16GB GDDR6, AMD RDNA 3 |
16GB GDDR6 |
ROCm / DirectML | 263W 700W PSU |
New | Price Options | — | Buy on Amazon |
Amazon prices and images are refreshed on a 24-hour cycle when available. A verified listing without a current featured numeric price is shown as Price Options; check Amazon for the current offer.
Frequently asked questions
Is an RTX 3090 still good for local AI?
Yes, particularly when 24GB of VRAM matters more than the newest architecture and the used card is in good condition.
Does an RTX 4090 have more VRAM than a 3090?
No. Both standard cards have 24GB. The 4090 mainly improves compute performance and efficiency.
Is 32GB enough for a 70B model?
It can help with aggressive quantization, but context and overhead may still require more than 32GB for some 70B configurations.