RTX 5070 vs RTX 4070 Super — the 12GB mid-range decision

RTX 5070 vs RTX 4070 Super: which 12GB card to buy used?

Editorial comparison updated 2026-07-26 · live eBay medians refresh daily · Methodology

Verdict: These cards are closer than the generation gap suggests: similar raster speed, identical 12GB ceilings, similar power. The 5070 adds GDDR7 bandwidth and DLSS 4 multi-frame generation; the 4070 Super typically costs less used. Buy on price. Take whichever is cheaper against its fair value the day you shop. Neither escapes the 12GB ceiling, so local-AI buyers wanting 30B-class models should look at 16–24GB cards instead.

	RTX 5070	RTX 4070 Super
Fair used value	$625 ($525–$750)	$480 ($300–$700)
eBay median (filtered)	$900 44% over fair	$800 67% over fair
Memory	12GB VRAM	12GB VRAM
$ / GB (at fair value)	$52	$40
Power	250W TDP	220W TDP
Launch MSRP	$549	$599

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

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What each can run locally

Model class (weights @ Q4)	RTX 5070 · 12GB	RTX 4070 Super · 12GB
7–8B @ Q4 (Llama 3.1 8B, Qwen3 8B)	✓ fits	✓ fits
14B @ Q4 (DeepSeek-R1 14B distill)	✓ fits	✓ fits
30B MoE @ Q4 (Qwen3-coder 30B)	— too big	— too big
32B dense @ Q4 (Qwen3 32B, R1 32B)	— too big	— too big
70B dense @ Q4 (Llama 3.3 70B)	— too big	— too big
100B+ MoE (gpt-oss-120b class)	— too big	— too big

Approximate weights-only footprints — long context and KV cache need additional memory headroom.

What the generation actually buys

The 5070’s real upgrades are memory bandwidth (GDDR7) and DLSS 4 multi-frame generation, which is meaningful in supported titles. Raw raster gains over the 4070 Super are modest — this is not a 3080-to-4080 style leap.

Both are efficient (roughly 220–250W), both carry 12GB, and both run 13–14B local models at Q4 equally well.

Price decides it

Check the medians above. When street prices sit close, take the 5070 for the feature set and longer support runway; when the 4070 Super dips meaningfully cheaper, it is the value pick. This is the rare comparison with no wrong answer at the right price.

FAQ

Is the RTX 5070 much faster than the RTX 4070 Super?

No — raster performance is close. The 5070’s advantages are DLSS 4 multi-frame generation and GDDR7 bandwidth, which help most in supported games and memory-bound inference.

Are 12GB cards enough for local AI?

For 13–14B models at Q4, yes, comfortably. For 30B-class models you want 16GB minimum and realistically 19GB+ — step up to a 16GB or 24GB card.

Which holds value better?

Newer generations typically depreciate slower, favoring the 5070. But you pay for that at purchase — the 4070 Super has already taken its depreciation hit, which is exactly why it is often the better used buy.

Also consider

Model	Memory	Fair value	eBay median
RTX 5070 Ti	16GB	$925	$1,300
RTX 4070	12GB	$525	$625