microsoft/Phi-3-medium-4k-instruct
14B params · est. 8.4 GB Q4
NVIDIA GeForce RTX 5090 32GB: likely fitAMD Radeon RX 7900 XTX 24GB: likely fit
Head-to-head
NVIDIA GeForce RTX 5090 32GB vs AMD Radeon RX 7900 XTX 24GB
Compare recorded specifications and inspect source links for both devices. Speed comparisons appear only when workload, runtime version, quantization, context and batch match.
Device profile
NVIDIA GeForce RTX 5090 32GB
8B–32B quantized models with room reserved for runtime and KV cache.
Curated Aggregate·2026-08-1032GB / $2.0k
Speed evidence
Matched rows below
VRAM
32 GB
TDP
575 W
Rating
Not scored
Device profile
AMD Radeon RX 7900 XTX 24GB
24GB VRAM for Linux-native builders who want NVIDIA-tier capacity at AMD pricing and are comfortable with software tradeoffs
Curated Aggregate·2026-03-1124GB / $899
Speed evidence
Matched rows below
VRAM
24 GB
TDP
355 W
Rating
Not scored
Quick verdict
Speed comparisons require matching runtime settings. A missing score means insufficient comparative evidence.
NVIDIA GeForce RTX 5090 32GB wins VRAM capacity.
AMD Radeon RX 7900 XTX 24GB has the lower published power rating.
| Metric | NVIDIA GeForce RTX 5090 32GB | AMD Radeon RX 7900 XTX 24GB |
|---|---|---|
| MyAI rating | Not scored | Not scored |
| Speed comparison | See matched rows below | See matched rows below |
| VRAM | 32 GB | 24 GB |
| TDP | 575 W | 355 W |
| MSRP | $2.0k | $899 |
| Workloads | 30 | 11 |
Shared benchmark rows
No batch-one rows with matching model, quantization, context, runtime and offload notes are available. We cannot calculate a comparable speed difference.
External quality layer
Best open models likely to fit this class
This shortlist cross-references the external OpenEvals snapshot with an approximate Q4-class VRAM estimate. Use it to sanity-check whether the hardware you are comparing can host strong open models, not just benchmark toy workloads.
91.0
microsoft/Phi-3.5-mini-instruct
3.8B params · est. 2.3 GB Q4
NVIDIA GeForce RTX 5090 32GB: likely fitAMD Radeon RX 7900 XTX 24GB: likely fit
internlm/internlm2_5-7b-chat
7.7B params · est. 4.6 GB Q4
NVIDIA GeForce RTX 5090 32GB: likely fitAMD Radeon RX 7900 XTX 24GB: likely fit
microsoft/Phi-3-mini-4k-instruct
3.8B params · est. 2.3 GB Q4
NVIDIA GeForce RTX 5090 32GB: likely fitAMD Radeon RX 7900 XTX 24GB: likely fit