Can Yi 1.5 6B run on GTX 1070 Ti 8GB?

YES — Runs Great

C54Usable

Estimated from fit model

Yi 1.5 6B needs ~6.3 GB VRAM. GTX 1070 Ti 8GB has 8.0 GB. With Q4_K_M quantization, expect ~45 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: LowStack: StandardBottleneck: Balanced

Operating mode

Choose the run profile you care about

Interactive favors responsiveness, while light API and scale-out lean harder on serving readiness. The fit stays the same, but the recommendation lens changes.

Current mode

Balanced

Balanced for general local use. Keeps the ranking neutral across personal and serving workflows.

Capabilities:

Select quantization to explore

Q4_K_M (Medium quality) — 6.3 GB, 44.9 tok/s, Runs well

6.3 GB required8.0 GB available

79% VRAM used

Fit status

Runs well

Decode

44.9 tok/s

TTFT

4314 ms

Safe context

Memory

6.3 GB / 8.0 GB

Memory breakdown

Weights3.7 GB

KV Cache1.0 GB

Runtime0.9 GB

Headroom0.8 GB

See how fast it feels

See how fast it feelsYi 1.5 6B on GTX 1070 Ti 8GB
1st promptCold start — includes initialization
>What is local AI inference?
Local AI inference means running an AI language model directly on your own hardware — your laptop, desktop, or server — instead of sending requests to a remote cloud API.

When you run inference locally the model weights are loaded into your GPU or unified memory. Each token you generate requires reading those weights from memory, so memory bandwidth is the main bottleneck for decode speed.

Key benefits of running locally:
  - Full privacy: your prompts never leave your machine
  - No per-token cost or rate limits
  - Works offline once the model is downloaded
  - Latency depends only on your hardware
2nd promptWarm — model ready, no init overhead
>How much VRAM do I need?
It depends on the model size and quantization level. A rough rule of thumb:

  Model size     Q4 (4-bit)    Q8 (8-bit)    FP16
  7B params      ~4.3 GB       ~7.5 GB       ~14 GB
  13B params     ~7.9 GB       ~13.9 GB      ~26 GB
  70B params     ~42.7 GB      ~74.9 GB      ~140 GB

Most people use 4-bit quantization (Q4_K_M) which gives 90-95% of full quality at a fraction of the memory. A 24 GB GPU can comfortably run most 7B-13B models.
Estimated: 44.9 tok/s decode · 4.3s TTFT (warm) · 112 tok/s prefill

What limits this setup

This setup is broadly balanced for this model.

Older PCIe generation

PCIe 3.0 is workable, but it compounds the penalty when you offload heavily or try to scale across multiple cards.

Best improvement path

Performance by workload

Workload	Grade	Fit	Decode	TTFT	Context
Chat	C	Runs well	44.9 tok/s	2353 ms	4K
Coding	C	Runs well	44.9 tok/s	4314 ms	4K
Agentic Coding	C	Tight fit	44.9 tok/s	6275 ms	4K
Reasoning	C	Runs well	44.9 tok/s	5098 ms	4K
RAG	C	Tight fit	44.9 tok/s	7843 ms	4K

Inference speed

Yi 1.5 6B inference speed — tokens per second by GPU & Mac

Estimated decode speed (tokens/sec) for Yi 1.5 6B at Q4_K_M across popular GPUs and Apple Silicon, using the fastest local runtime per device. Fastest is RTX 5090 32GB at ~114 tok/s. Speed is memory-bandwidth bound, so cards that fit the whole model in VRAM run far faster than ones that offload to system RAM.

GPU / Mac	Memory	Quant	Speed (tok/s)	Fits?
RTX 5090 32GB	32 GB	Q4_K_M	114.0	Fits
RTX 4090 24GB	24 GB	Q4_K_M	84.0	Fits
RTX 4080 Super 16GB	16 GB	Q4_K_M	84.0	Fits
RTX 3090 24GB	24 GB	Q4_K_M	84.0	Fits
RTX 4070 12GB	12 GB	Q4_K_M	84.0	Fits
RX 7900 XTX 24GB	24 GB	Q4_K_M	84.0	Fits
MacBook Pro M4 Max 128GB	128 GB	Q4_K_M	84.0	Fits
Mac Studio M3 Ultra 256GB	256 GB	Q4_K_M	84.0	Fits
Mac Studio M2 Ultra 128GB	128 GB	Q4_K_M	84.0	Fits
Mac Studio M1 Ultra 128GB	128 GB	Q4_K_M	84.0	Fits
MacBook Pro M4 Max 64GB	64 GB	Q4_K_M	84.0	Fits
MacBook Pro M3 Max 64GB	64 GB	Q4_K_M	71.3	Fits
RTX 3060 12GB	12 GB	Q4_K_M	70.6	Fits
MacBook Pro M1 Max 64GB	64 GB	Q4_K_M	65.4	Fits
MacBook Pro M4 Pro 48GB	48 GB	Q4_K_M	57.5	Fits
RTX 4060 8GB	8 GB	Q4_K_M	54.3	Fits

Estimates for single-stream decoding at Q4_K_M; real tokens/sec varies with prompt length, context, batch size, and runtime build. Prompt processing (prefill) is faster than the decode figures shown here.

Quantization options

How Yi 1.5 6B (6B params) fits at each quantization level on GTX 1070 Ti 8GB (8.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	2.3 GB	Low	C52
Q3_K_S	3	2.9 GB	Low	C53
NVFP4	4	3.4 GB	Medium	C53
Q4_K_M	4	3.7 GB	Medium	C53
Q5_K_M	5	4.3 GB	High	C53
Q6_KBest for your GPU	6	4.9 GB	High	C53
Q8_0	8	6.4 GB	Very High	F0
F16	16	12.3 GB	Maximum	F0

Get started

Copy-paste commands to run Yi 1.5 6B on your machine.

Run

lms load Yi-1.5-6B-Chat && lms server start

Upgrade options

Hardware that runs Yi 1.5 6B well

RTX 3080 10GBBudget pick

10 GB VRAM (+2)760 GB/s (+504)

Raises estimated decode speed by about 60%.72 tok/s decode

Raises estimated decode speed by about 60%.

Adds memory headroom for longer context windows and future model growth.

~$699 MSRP

Frequently asked questions

Can GTX 1070 Ti 8GB run Yi 1.5 6B?

Yes, GTX 1070 Ti 8GB can run Yi 1.5 6B with a C grade (Runs well). Expected decode speed: 44.9 tok/s.

How much VRAM does Yi 1.5 6B need?

Yi 1.5 6B (6B parameters) requires approximately 6.3 GB of memory with Q4_K_M quantization.

What is the best quantization for Yi 1.5 6B?

The recommended quantization for Yi 1.5 6B is Q4_K_M, which balances quality and memory efficiency.

What speed will Yi 1.5 6B run at on GTX 1070 Ti 8GB?

On GTX 1070 Ti 8GB, Yi 1.5 6B achieves approximately 44.9 tokens per second decode speed with a time-to-first-token of 4314ms using Q4_K_M quantization.

Can GTX 1070 Ti 8GB run Yi 1.5 6B for coding?

For coding workloads, Yi 1.5 6B on GTX 1070 Ti 8GB receives a C grade with 44.9 tok/s and 4K context.

What context window can Yi 1.5 6B use on GTX 1070 Ti 8GB?

On GTX 1070 Ti 8GB, Yi 1.5 6B can safely use up to 4K tokens of context. The model's official context limit is 4K, but available memory constrains the safe maximum.

See all results for GTX 1070 Ti 8GB See all hardware for Yi 1.5 6B

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Preview:

Workload

Grade

Fit

Decode

TTFT

Context

Chat

Runs well

44.9 tok/s

2353 ms

Coding

Runs well

44.9 tok/s

4314 ms

Agentic Coding

Tight fit

44.9 tok/s

6275 ms

Reasoning

Runs well

44.9 tok/s

5098 ms

RAG

Tight fit

44.9 tok/s

7843 ms

Yi 1.5 6B inference speed — tokens per second by GPU & Mac

GPU / Mac

Memory

Quant

Speed (tok/s)

Fits?

RTX 5090 32GB

32 GB

Q4_K_M

114.0

Fits

RTX 4090 24GB

24 GB

Q4_K_M

84.0

Fits

RTX 4080 Super 16GB

16 GB

Q4_K_M

84.0

Fits

RTX 3090 24GB

24 GB

Q4_K_M

84.0

Fits

RTX 4070 12GB

12 GB

Q4_K_M

84.0

Fits

RX 7900 XTX 24GB

24 GB

Q4_K_M

84.0

Fits

MacBook Pro M4 Max 128GB

128 GB

Q4_K_M

84.0

Fits

Mac Studio M3 Ultra 256GB

256 GB

Q4_K_M

84.0

Fits

Mac Studio M2 Ultra 128GB

128 GB

Q4_K_M

84.0

Fits

Mac Studio M1 Ultra 128GB

128 GB

Q4_K_M

84.0

Fits

MacBook Pro M4 Max 64GB

64 GB

Q4_K_M

84.0

Fits

MacBook Pro M3 Max 64GB

64 GB

Q4_K_M

71.3

Fits

RTX 3060 12GB

12 GB

Q4_K_M

70.6

Fits

MacBook Pro M1 Max 64GB

64 GB

Q4_K_M

65.4

Fits

MacBook Pro M4 Pro 48GB

48 GB

Q4_K_M

57.5

Fits

RTX 4060 8GB

8 GB

Q4_K_M

54.3

Fits

Quant

Bits

VRAM

Quality

Fit

Q2_K

2.3 GB

Low

C52

Q3_K_S

2.9 GB

Low

C53

NVFP4

3.4 GB

Medium

C53

Q4_K_M

3.7 GB

Medium

C53

Q5_K_M

4.3 GB

High

C53

Q6_KBest for your GPU

4.9 GB

High

C53

Q8_0

6.4 GB

Very High

F16

12.3 GB

Maximum

Frequently asked questions

Can GTX 1070 Ti 8GB run Yi 1.5 6B?

Yes, GTX 1070 Ti 8GB can run Yi 1.5 6B with a C grade (Runs well). Expected decode speed: 44.9 tok/s.

How much VRAM does Yi 1.5 6B need?

Yi 1.5 6B (6B parameters) requires approximately 6.3 GB of memory with Q4_K_M quantization.

What is the best quantization for Yi 1.5 6B?

The recommended quantization for Yi 1.5 6B is Q4_K_M, which balances quality and memory efficiency.

What speed will Yi 1.5 6B run at on GTX 1070 Ti 8GB?

On GTX 1070 Ti 8GB, Yi 1.5 6B achieves approximately 44.9 tokens per second decode speed with a time-to-first-token of 4314ms using Q4_K_M quantization.

Can GTX 1070 Ti 8GB run Yi 1.5 6B for coding?

For coding workloads, Yi 1.5 6B on GTX 1070 Ti 8GB receives a C grade with 44.9 tok/s and 4K context.

What context window can Yi 1.5 6B use on GTX 1070 Ti 8GB?

On GTX 1070 Ti 8GB, Yi 1.5 6B can safely use up to 4K tokens of context. The model's official context limit is 4K, but available memory constrains the safe maximum.