RTX 5070 Ti vs RTX 5080 for Local AI: Same 16GB — Which One in 2026?
The RTX 5070 Ti and RTX 5080 share the same 16GB of GDDR7 and the same model-fit ceiling. The 5080 has more CUDA cores and bandwidth; the 5070 Ti is cheaper at MSRP but often isn't at street prices. We break down which actually wins for local LLMs.
Compute Market Team
Our Top Pick
Quick Answer
Both have the same 16GB and fit the same models — buy the RTX 5070 Ti only if you find it near its $749 MSRP; otherwise the RTX 5080 is the better buy. The RTX 5080 ($999–$1,099) has 10,752 CUDA cores and 960 GB/s of bandwidth. The RTX 5070 Ti ($1,049–$1,299 street, $749 MSRP) has 8,960 cores and 896 GB/s. When the 5070 Ti sells near MSRP it's the value pick; when it sells at or above the 5080 — as it often does — the 5080's extra cores and bandwidth win. Same 16GB means the same model ceiling either way.
The RTX 5070 Ti and RTX 5080 are the two mid-tier Blackwell cards that share one defining number: 16GB of GDDR7. Unlike the RTX 5090 vs RTX 5080 matchup — where VRAM doubles and changes what you can run — these two fit exactly the same models. That makes this a pure price-and-speed comparison, not a capability one.
On paper the RTX 5070 Ti looks like the obvious value play: nearly the same bandwidth as the RTX 5080 for a lower MSRP. But MSRP and street price have drifted apart, and the honest answer depends entirely on what you'd actually pay. Let's look at the specs, then the prices that decide it.
RTX 5070 Ti vs RTX 5080 — Specs at a Glance
Same architecture (Blackwell, 5th-gen tensor cores, FP4), same 16GB GDDR7, same PCIe 5.0. The differences are compute, bandwidth, and power — all modest.
| Spec | RTX 5070 Ti | RTX 5080 | Difference |
|---|---|---|---|
| VRAM | 16GB GDDR7 | 16GB GDDR7 | Identical — same model ceiling |
| CUDA Cores | 8,960 | 10,752 | 5080 ~20% more |
| Memory Bandwidth | 896 GB/s | 960 GB/s | 5080 ~7% more |
| TDP | 300W | 360W | 5070 Ti runs cooler |
| Interface | PCIe 5.0 x16 | PCIe 5.0 x16 | Same |
| Price | $1,049–$1,299 ($749 MSRP) | $999–$1,099 | The whole decision |
Specs and pricing from our product catalog. The RTX 5070 Ti's $749 MSRP is frequently unavailable; street prices fluctuate.
Same 16GB, Same Model Ceiling
Because both cards carry 16GB, they fit the same workloads — the VRAM ceiling doesn't move between them:
- 7B–14B models (Q4): Run comfortably on both. This is the sweet spot for either card — Llama, Mistral, Qwen, Phi.
- 30B–32B models: Possible on both only with aggressive quantization, and with the same quality trade-offs. Neither card has more room than the other here.
- 70B models: Out of reach for both at usable quantization. If this is your target, a 16GB card isn't the tool — see the paths below.
If you need more than 16GB, the decision isn't between these two at all. A used RTX 3090's 24GB or the RTX 5090's 32GB change what you can run; more cores on a 16GB card do not. Our VRAM guide helps you size this before you buy.
The Speed Difference — Real but Small
Local LLM inference tracks memory bandwidth closely, and the 5080's edge here is only about 7% (960 vs 896 GB/s), backed by ~20% more CUDA cores. Expect the 5080 to generate tokens a bit faster on models both fit — noticeable in benchmarks, rarely transformative in daily use. These two are far closer to each other than either is to the 5090.
Exact tokens-per-second vary by model, quantization, and runtime (llama.cpp, vLLM, Ollama), so treat any single figure as directional rather than a guarantee.
Price Decides This One
Here's the honest part. The RTX 5070 Ti's value case rests entirely on its $749 MSRP — but that price is frequently unavailable. At the street prices we track ($1,049–$1,299), it overlaps or exceeds the $999–$1,099 RTX 5080. When you're paying the same or more for fewer cores and less bandwidth, the 5070 Ti stops making sense. So the rule is simple: check the real price of both before you buy, and let the actual number — not the MSRP on the box — make the call.
The Verdict — Who Should Buy Which
Buy the RTX 5070 Ti if — and only if — you find it near its $749 MSRP or clearly below the 5080. At that price it delivers nearly the same local-AI experience for less, and its lower 300W draw is a bonus for compact builds.
Buy the RTX 5080 if the two are priced within a small margin of each other (the common case), or if you want the most performance available from a 16GB Blackwell card. More cores, more bandwidth, same 16GB — it's the default winner whenever the price gap is thin.
Deciding across the whole Blackwell stack? Our RTX 5090 vs RTX 5080 and RTX 5060 Ti vs 5070 Ti breakdowns place these two in the full lineup, and the best GPU for AI guide ranks them against everything else.
Frequently Asked Questions
Is the RTX 5070 Ti or RTX 5080 better for local AI?
They fit exactly the same models — both have 16GB of GDDR7, so both handle 7B–14B models comfortably and 30B-class models with aggressive quantization, and neither runs a 70B model without heavy compression. The RTX 5080 has more CUDA cores (10,752 vs 8,960) and slightly higher bandwidth (960 vs 896 GB/s), so it generates tokens a bit faster. The RTX 5070 Ti's whole case is price: at its $749 MSRP it's a clear value pick, but at the street prices we're seeing it often lands at or above the 5080, which erases its advantage.
Do the RTX 5070 Ti and RTX 5080 run the same size models?
Yes. Both carry 16GB of GDDR7, so their model-fit ceiling is identical: 7B and 13B–14B models run comfortably at Q4, 30B-class models need aggressive quantization with quality trade-offs, and 70B models are out of reach for either card at usable quantization. If you specifically need to fit larger models, neither 16GB card is the answer — look at the 24GB used RTX 3090 or the 32GB RTX 5090 instead.
How much faster is the RTX 5080 than the RTX 5070 Ti?
Modestly. The 5080 has about 20% more CUDA cores (10,752 vs 8,960) and roughly 7% more memory bandwidth (960 vs 896 GB/s). Since local LLM inference is largely bandwidth-bound, expect the 5080 to be a little quicker on token generation, but not dramatically so — they're much closer to each other than either is to the 32GB RTX 5090. On models both fit, the difference is real but not transformative.
Is the RTX 5070 Ti worth it over the RTX 5080?
Only if you can buy it near its $749 MSRP. At that price the 5070 Ti is the value pick — nearly the same bandwidth and the same 16GB for meaningfully less money. But street prices frequently push it into $1,049–$1,299 territory, overlapping or exceeding the $999–$1,099 RTX 5080. When the prices are that close, the 5080's extra cores and bandwidth make it the smarter buy. Always compare the actual price you'd pay, not MSRP.
What power supply do the RTX 5070 Ti and RTX 5080 need?
Both are manageable. The RTX 5070 Ti draws 300W and pairs well with a quality 750W PSU; the RTX 5080 draws 360W and is comfortable on a 750W–850W supply. Neither demands the 1000W+ setup the 575W RTX 5090 needs, which is part of why both are practical single-GPU AI-workstation cards.