RTX 3080 10GB vs RX 6800 XT — older used GPUs, memory and compatibility

RTX 3080 10GB vs RX 6800 XT: older used GPUs, memory and compatibility

Hardware advice reviewed 2026-10-20 · asking-price samples checked for freshness · Methodology

Two older used-market alternatives. This page deliberately compares the original 10GB RTX 3080 with the 16GB RX 6800 XT; the 12GB RTX 3080 is a separate configuration.

Verdict: The RX 6800 XT offers 6GB more VRAM, while the RTX 3080 is a candidate for CUDA workloads that fit in 10GB. Check the exact software and operating system before choosing the Radeon, and inspect used-card condition before treating either listing as good value.

	RTX 3080 10GB	RX 6800 XT
Historical editorial estimate	$350 ($300–$425)	$380 ($230–$560)
eBay median (filtered)	—	—
Memory	10GB VRAM	16GB VRAM
$ / GB (sample median)	Unavailable	Unavailable
Power	320W TDP	300W TDP
Launch MSRP	$699	$649

Fair values are historical editorial estimates, not current offers; eBay medians are filtered Buy-It-Now samples, not checkout prices. See how we compute these.

Affiliate disclosure: Affiliate (paid) links: we may earn a commission from eBay Partner Network and Amazon Associates at no extra cost to you. As an Amazon Associate I earn from qualifying purchases. Full disclosure.

Verify model fit before buying

Memory capacity alone cannot tell you which models run. Check the artifact, runtime, context and concurrency, including cache and working buffers. Mac memory is shared with the operating system. See our memory sizing guide.

We have not benchmarked these configurations. Hardware advice reviewed 2026-10-20. Check the sources below for supported hardware and software requirements.

An older card needs a closer inspection

Ask for evidence of stable operation, inspect fans and connectors, and check return terms. Include any PSU or cooling work in the purchase cost. A low asking price does not establish that a heavily used card is a bargain.

How to compare gaming results

Use results for the same game, resolution, settings and test system. Separate native rendering from upscaling and frame generation, and look at frame-time consistency as well as average FPS. We have not run matched gaming benchmarks for these cards.

Sources and review

Ollama hardware and operating-system support

FAQ

Does the RTX 3080 comparison include the 12GB model?

No. These prices and specifications refer to the 10GB model. The 12GB version has a separate catalog page; mixing their listings would obscure the capacity difference.

Which price should I use for this comparison?

Use the dated eBay sample medians as a starting point, then compare shipping, tax, condition and returns. A missing sample means insufficient fresh data, not that the card is unavailable. Historical editorial estimates are not checkout offers.