RTX 3080 vs RTX 4070 — used price and value comparison

RTX 3080 vs RTX 4070: cheap veteran or efficient successor?

Hardware advice reviewed 2026-10-04 · asking-price samples checked for freshness · Methodology

Verdict: This comparison uses the 10GB RTX 3080 and 12GB RTX 4070. The extra 2GB can help when a workload is near the memory limit, but it does not create a universal 14B-model cutoff. Choose with a matching workload benchmark, current price and complete-system requirements.

	RTX 3080 10GB	RTX 4070
Historical editorial estimate	$350 ($300–$425)	$525 ($450–$625)
eBay median (filtered)	—	—
Memory	10GB VRAM	12GB VRAM
$ / GB (sample median)	Unavailable	Unavailable
Power	320W TDP	200W TDP
Launch MSRP	$699	$599

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.

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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 2026-10-04. Check the sources below for supported hardware and software requirements.

Confirm the variant

The RTX 3080 also has a separate 12GB version. Check the listing and use the corresponding price page. Model names without the memory configuration are insufficient for this comparison.

Local AI fit

Check artifact size, context, runtime and available memory. A 10GB card is not restricted to one parameter class, and 12GB does not guarantee comfortable operation for every 14B artifact.

Buying checks

Inspect condition and seller return terms. Compare measured performance in the actual application and include any PSU or cooling changes; do not infer condition from the card generation.

Sources and review

FAQ

How do I know whether my model will fit?

Check the exact artifact, runtime, context and concurrency. Allow for cache and working memory; installed capacity alone is not a fit test.

Which is the better value today?

First confirm that the hardware supports your workload. Then compare dated asking-price samples, condition, checkout cost and any required system upgrades. Historical editorial fair values are not current offers.

Also consider

Model	Memory	Fair value	eBay median
RTX 3080 12GB	12GB	$450	—
RTX 4070 Super	12GB	$480	—