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RTX 5080 vs RTX 5070: Which Blackwell GPU Should You Buy in 2026?

By SpecPicks Editorial · Published April 24, 2026 · Last verified April 24, 2026 · 9 min read

The RTX 5080 vs 5070 decision comes down to whether you are buying for 1440p high-refresh gaming (5070, $549 MSRP, 250 W TGP) or 4K ultra and local-AI workloads (5080, $999 MSRP, 360 W TGP). In PassMark's G3D Mark the 5080 scores 35,697 pts versus the 5070's 28,758 pts — a 24 % rasterization gap for a roughly 80 % higher price. For most buyers that math favors the 5070. For 4K ultra with ray tracing, for 16 GB VRAM workloads, and for running Llama / Qwen class models above 8B parameters, the 5080 is the only one of the two that clears the bar.

Key takeaways

• 5080 wins raw performance — ~24 % higher PassMark G3D, ~35 % higher MSRP-to-MSRP, 4 GB more VRAM, full 256-bit memory bus.
• 5070 wins perf-per-dollar — $549 vs $999 MSRP puts the 5070 at roughly 0.92× the perf-per-dollar leader board spot the 5080 cannot match for pure 1440p rasterization.
• VRAM decides the AI argument — the 5080's 16 GB holds Qwen 3 14B / Llama 3.1 8B at q8 comfortably; the 5070's 12 GB forces q4 or CPU offload for anything past 13B-class models.
• Power delivery matters — 360 W TGP on the 5080 means a real 850 W PSU and ≥ 2.5-slot cooling; the 5070 is happy on a 650 W PSU and a 2-slot design.
• Both are Blackwell (SM 120) — same DLSS 4, same Multi Frame Generation, same 5th-gen Tensor Cores, same 4th-gen RT cores. There is no feature gap; only a scale gap.

The spec delta, side by side

Specs from NVIDIA's product pages (5080, 5070) and TechPowerUp's GPU database (5080, 5070).

Synthetic benchmarks: what our catalog says

SpecPicks imports PassMark G3D Mark and Tom's Hardware GPU Hierarchy into the hardware benchmark database. Here is what is on file as of April 2026:

The ~24 % delta in PassMark G3D Mark lines up cleanly with the 5080's 75 % CUDA-core advantage being throttled by its only 43 % higher memory bandwidth — games, which are bandwidth-sensitive at higher resolutions, scale closer to the bandwidth ratio than the shader ratio. Expect that gap to stretch at 4K and compress at 1080p.

Gaming performance: 1440p and 4K

Independent review data from TechPowerUp, Tom's Hardware, and Guru3D consistently shows the same shape: roughly a 20–25 % gap at 1440p widening to 25–35 % at 4K. Rough figures across the industry aggregate:

Numbers aggregated from TechPowerUp RTX 5080 review, Tom's Hardware RTX 5070 review, and Guru3D's RTX 5080 coverage. Compare in detail on the RTX 5080 benchmark page and RTX 5070 benchmark page.

Read: at 1440p the 5070 is clearly enough for ultra + DLSS Quality in anything that shipped in 2025. At 4K native ultra with ray tracing, the 5070 drops below 60 fps in several AAA titles; the 5080 holds above it with room for DLSS Quality instead of Performance. That is the real split.

AI / local-LLM performance

Both cards are Blackwell with 5th-gen Tensor Cores and full FP8 and FP4 support, so per-SM AI throughput is nearly identical. The 5080 wins the AI argument on two things only: SM count (84 vs 48, for raw prefill) and VRAM (16 GB vs 12 GB, for what fits).

VRAM numbers are weights + a reasonable KV cache at 4K-8K context; real usage varies by runtime. Source: llama.cpp model card estimates and Bartowski GGUF quant tables on HuggingFace. For step-by-step setup on either card, see our guides on running Qwen 3 14B on the RTX 5080 and running Llama 3.1 8B on the RTX 5080.

The practical takeaway: if your home-AI plan is a single 7B/8B chat model at q4-q5, either GPU will deliver 80–120 tok/s on llama.cpp with plenty of headroom. If you want to run a 14B at full q8 or a 27B at q4, the 5070 runs out of VRAM and the 5080 does not. That single capability — not the tok/s number — is the 5080's strongest AI-side argument.

Prefill vs generation, and why it matters

On small chat prompts (a few hundred tokens), generation-speed dominates and the 5070 is only ~25 % behind. On RAG / long-context workloads where 4-16 K tokens of prefill run before the first generated token, the 5080's 75 % higher SM count pulls ahead materially — expect a ~40-50 % faster time-to-first-token on 8K-context RAG prompts.

Power, PSU sizing, and thermals

Transient-spike figures from Tom's Hardware power testing methodology on the Founders Edition cards. Plan PSU wattage around the transient figure, not the rated TGP — a quality 850 W Gold unit is a real requirement for the 5080, not an NVIDIA safety margin.

Price, perf-per-dollar, and perf-per-watt

The 5070 is objectively the better-value card for buyers whose workloads fit in 12 GB. The 5080 only "wins" when the workload requires its extra VRAM or SM count — 4K native-RT gaming and 14B+ local AI inference.

Which should you buy?

Get the RTX 5080 if…

• You game at 4K ultra with ray tracing and want DLSS Quality (not Performance) headroom.
• You run local LLMs above 13B parameters, or need q8 weights on 8B-14B models.
• You do mixed creative work — 4K video, Blender GPU rendering, Stable Diffusion XL / SD3.
• You are building a system you want to keep for 4+ years and want room for VRAM-hungry future titles.

Get the RTX 5070 if…

• You game at 1440p high-refresh (144-240 Hz) and have a 1440p or sub-4K monitor.
• You are building on a $1,200-$1,800 total-system budget and want every dollar past the GPU spent on CPU, RAM, and storage.
• Your AI workload is under 12 GB — 7B/8B chat models, embeddings, Whisper, Stable Diffusion 1.5 / SDXL q8.
• You want to stay on a 650 W PSU and a 2-slot cooler footprint.

Get neither if… your budget forces you below $500 (look at the RX 9060 XT 16 GB or used RTX 4070), or your budget is over $1,600 and 4K RT perf matters — at that point the RTX 5090 or a used RTX 4090 delivers meaningfully more.

Featured builds running each GPU

Since neither the 5080 nor 5070 is routinely listed at MSRP standalone on Amazon, most readers will find the best deal in a curated prebuilt. Two we are currently tracking:

RTX 5080 build — Panorama XL ($3,649) 8-core i9-14900KF, 32 GB DDR5, 2 TB Gen4 NVMe, 360 mm AIO, 3-year warranty. A reasonable all-in cost once you factor MSRP GPU pricing with the build premium typical of late-2025 / 2026 prebuilts.

View on Amazon →

Price sourced from Amazon.com. Last updated April 24, 2026. Price and availability subject to change.

See full details →

RTX 5070 build — MSI Aegis ZS2 ($2,179) Ryzen 9 7900X, 32 GB DDR5, 2 TB NVMe, liquid cooling, WiFi 7. Mid-range complete system — the kind of build the 5070 is actually sized for.

View on Amazon →

Price sourced from Amazon.com. Last updated April 24, 2026. Price and availability subject to change.

See full details →

Alternative 5080 build — STORMCRAFT Phantom ($2,999) Ryzen 7 9800X3D + RTX 5080 + B850, 32 GB DDR5-6000, 850 W PSU, 360 mm AIO. Arguably the better 5080 pairing because the 9800X3D prevents CPU bottlenecks at 1440p.

View on Amazon →

Price sourced from Amazon.com. Last updated April 24, 2026. Price and availability subject to change.

See full details →

FAQ

Is the RTX 5080 worth the extra $450 over the 5070?

Only at 4K with ray tracing, or for local AI workloads that need more than 12 GB of VRAM. At 1440p in pure rasterization the 5070 delivers roughly 0.80× the 5080's framerate for 0.55× the price — the 5070 wins that comparison clearly. At 4K native ultra with ray tracing, the 5070 drops below 60 fps in several 2024-2025 AAA titles while the 5080 stays above, and that capability is worth the premium if you actually game at 4K.

Can the RTX 5070 run Llama 3.1 70B or similar large models?

No. Llama 3.1 70B at q4_K_M needs roughly 42 GB of VRAM for weights alone — neither the 5070 nor the 5080 can run it without heavy CPU offloading, which drops generation to 3-6 tok/s on either card. For a single-GPU 70B-class experience you need 48 GB (RTX 6000 Ada) or a dual-5090 / dual-4090 build. The 5080's 16 GB does unlock q8 14B models and q4 27B models the 5070 cannot touch, so "more capable AI card" is accurate within its class.

Does the RTX 5070 support DLSS 4 and Multi Frame Generation?

Yes. Both the 5080 and 5070 are Blackwell (SM 120) cards with 5th-generation Tensor Cores and the full Multi Frame Generation feature set. Every DLSS 4 capability the 5080 has, the 5070 has. The gap is raw compute and VRAM, not features.

What PSU do I need for the RTX 5080 vs the 5070?

NVIDIA lists 850 W for the 5080 and 650 W for the 5070. In practice the 5080's transient spikes can approach 560 W for very short durations, so an 850 W Gold unit from a reputable vendor is a real requirement — budget 80 Plus units under 750 W can trip OCP. The 5070 is far more forgiving; a quality 650 W unit is comfortable.

Which card is better for streaming while gaming?

Both use the same 9th-gen NVENC, so encoder quality and efficiency are identical. What matters is having enough headroom so the encoder does not bottleneck the game. At 1440p streaming the 5070 has plenty; at 4K streaming + ray tracing the 5080's extra compute keeps frame pacing cleaner. For most streamers, either is fine.

How does this compare to AMD's RX 9070 XT?

The RX 9070 XT sits between these two in raw raster — faster than the 5070, slower than the 5080 — at roughly $599 MSRP with 16 GB VRAM. If AMD pricing and availability in your region are good, the 9070 XT is a genuine alternative to the 5070. Our RTX 5080 vs RX 9070 XT head-to-head covers that matchup in detail.

Sources

1. NVIDIA — GeForce RTX 5080 product page (official specs, TGP, MSRP).
2. NVIDIA — GeForce RTX 5070 product page.
3. TechPowerUp — RTX 5080 Founders Edition review and GPU database entries.
4. Tom's Hardware — GPU Hierarchy 2026 and the RTX 5070 review.
5. PassMark — GeForce RTX 5080 G3D Mark and RTX 5070 G3D Mark.
6. Guru3D — NVIDIA GeForce RTX 5080 Founders review.

Related guides

• RTX 5080 vs RX 9070 XT — the AMD alternative at the 5080 tier.
• RTX 5090 vs RTX 5080: Which Should You Buy in 2026? — if your budget stretches upward.
• RTX 5080 vs RTX 4080 SUPER — one generation apart — the upgrade-from-Ada calculus.
• RTX 3080 vs RTX 5080 — is it time to upgrade? — two-generations-out comparison.
• How to run Qwen 3 14B on the RTX 5080 — the AI workload that needs the 5080's 16 GB.

— SpecPicks Editorial · Last verified April 24, 2026