RTX 6000 Ada 48GB vs RX 7900 XTX 24GB for Local LLMs

Both list the same memory bandwidth (960 GB/s), so per-token decode speed should be similar whenever a model fits both. The RTX 6000 Ada 48GB fits more of the catalog at Q4/8K — 39 vs 33 of 61 models (48 vs 24 GB VRAM). Largest model that fits the RTX 6000 Ada 48GB but not the RX 7900 XTX 24GB: Qwen3-Coder-Next (79.7B). MSRP is $6,800 for the RTX 6000 Ada 48GB vs $999 for the RX 7900 XTX 24GB. MSRP is a launch list price, not live retail — Amazon prices move; click through for the current price. In the Q4/8K head-to-head below (47 shared models), the RTX 6000 Ada 48GB posts the higher tok/s in 11 rows vs 6. Methodology.

Spec comparison

	RTX 6000 Ada 48GB	RX 7900 XTX 24GB
Vendor	NVIDIA	AMD
VRAM	48 GB	24 GB
Memory type	GDDR6	GDDR6
Memory bandwidth	960 GB/s	960 GB/s
TDP	300 W	355 W
MSRP (list)	$6,800	$999
Buy	Search Amazon (affiliate)	ASRock Radeon RX 7900 XTX Phantom Gaming 24GB OC (affiliate) · More listings

MSRP is the launch list price, not live retail. Buy links are Amazon affiliate links — the price after you click is the live price.

Q4 / 8K head-to-head — top 15 of 47 shared models

Model	Params (B)	RTX 6000 Ada 48GB tok/s	RTX 6000 Ada 48GB fits	RX 7900 XTX 24GB tok/s	RX 7900 XTX 24GB fits	Winner
Qwen3-0.6B	0.8	763.6 est.	Yes	763.6 est.	Yes	Tie
Qwen3-Next-80B-A3B-Instruct	81.3	624.8 est.	No	156.2 est.	No	RTX 6000 Ada 48GB
gemma-3-1b-it	1.0	610.9 est.	Yes	610.9 est.	Yes	Tie
Llama-3.2-1B-Instruct	1.2	509.1 est.	Yes	509.1 est.	Yes	Tie
Qwen3-1.7B	2.0	305.5 est.	Yes	305.5 est.	Yes	Tie
Qwen3-30B-A3B	30.5	203.6 est.	Yes	203.6 est.	Yes	Tie
Qwen3-Coder-30B-A3B-Instruct	30.5	203.6 est.	Yes	203.6 est.	Yes	Tie
GLM-4.7-Flash	31.2	203.6 est.	Yes	203.6 est.	Yes	Tie
Qwen3-30B-A3B-Instruct-2507	30.5	203.6 est.	Yes	203.6 est.	Yes	Tie
Qwen3-Coder-Next	79.7	203.6 est.	Yes	162.3 est.	No	RTX 6000 Ada 48GB
Llama-3.2-3B-Instruct	3.2	190.9 est.	Yes	190.9 est.	Yes	Tie
gpt-oss-20b	21.5	169.7 est.	Yes	169.7 est.	Yes	Tie
gpt-oss-120b	120.4	169.3 est.	No	42.3 est.	No	RTX 6000 Ada 48GB
Mistral-7B-Instruct-v0.3	7.2	166.6 measured	Yes	68.0 measured	Yes	RTX 6000 Ada 48GB
Phi-4-mini-instruct	3.8	160.8 est.	Yes	160.8 est.	Yes	Tie

est. = bandwidth-based estimate; measured = curated real benchmark that overrides the estimate. Fits = weights + KV(8K) + 1 GB overhead ≤ 95% of VRAM.

Fit coverage at Q4 / 8K

	RTX 6000 Ada 48GB	RX 7900 XTX 24GB
Catalog models that fit	39 of 61	33 of 61
Largest exclusive fit	Qwen3-Coder-Next (79.7B)	—

RTX 6000 Ada 48GB details → · RX 7900 XTX 24GB details →