Can Yi Coder 1.5B Chat run on Radeon RX 6850M XT 12GB?

YES — Runs Great

C43Usable

Estimated from fit model

Yi Coder 1.5B Chat needs ~3.2 GB VRAM. Radeon RX 6850M XT 12GB has 12.0 GB. With Q4_K_M quantization, expect ~21 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) — 3.2 GB, 21.0 tok/s, Runs well

3.2 GB required12.0 GB available

27% VRAM used

Fit status

Runs well

Decode

21.0 tok/s

TTFT

9219 ms

Safe context

818K

Memory

3.2 GB / 12.0 GB

Memory breakdown

Weights0.9 GB

KV Cache0.2 GB

Runtime0.9 GB

Headroom1.2 GB

See how fast it feels

See how fast it feelsYi Coder 1.5B Chat on Radeon RX 6850M XT 12GB
1st promptCold start — includes initialization
>Write a Python function to sort a list
Here's a Python function that sorts a list using quicksort:

def quicksort(arr):
    if len(arr) <= 1:
        return arr
    pivot = arr[len(arr) // 2]
    left   = [x for x in arr if x < pivot]
    middle = [x for x in arr if x == pivot]
    right  = [x for x in arr if x > pivot]
    return quicksort(left) + middle + quicksort(right)

# Example usage
numbers = [3, 6, 8, 10, 1, 2, 1]
print(quicksort(numbers))  # [1, 1, 2, 3, 6, 8, 10]

The algorithm picks a pivot, partitions the list into smaller, equal, and larger elements, then recursively sorts each partition and concatenates the results.
2nd promptWarm — model ready, no init overhead
>Now add type hints and a docstring
def quicksort(arr: list[int]) -> list[int]:
    """Sort a list using the quicksort algorithm.

    Args:
        arr: List of integers to sort.

    Returns:
        A new sorted list.
    """
    if len(arr) <= 1:
        return arr
    pivot = arr[len(arr) // 2]
    left   = [x for x in arr if x < pivot]
    middle = [x for x in arr if x == pivot]
    right  = [x for x in arr if x > pivot]
    return quicksort(left) + middle + quicksort(right)

Added type hints for the input and return type, plus a Google-style docstring.
Estimated: 21.0 tok/s decode · 9.2s TTFT (warm) · 53 tok/s prefill

What limits this setup

This setup is broadly balanced for this model.

No major red flags

This recommendation has enough memory headroom and acceptable estimated speed for the selected workload.

Best improvement path

Performance by workload

Workload	Grade	Fit	Decode	TTFT	Context
Chat	C	Runs well	21.0 tok/s	5029 ms	719K
Coding	C	Runs well	21.0 tok/s	9219 ms	818K
Agentic Coding	C	Runs well	21.0 tok/s	13410 ms	818K
Reasoning	C	Runs well	21.0 tok/s	10895 ms	818K
RAG	C	Runs well	21.0 tok/s	16762 ms	818K

Quantization options

How Yi Coder 1.5B Chat (1.5B params) fits at each quantization level on Radeon RX 6850M XT 12GB (12.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	0.6 GB	Low	C47
Q3_K_S	3	0.7 GB	Low	C47
NVFP4	4

Get started

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

Run

lms load hf-maziyarpanahi--yi-coder-1-5b-chat-gguf && lms server start

Upgrade options

Hardware that runs Yi Coder 1.5B Chat well

RTX 5060 Ti 16GBBudget pick

16 GB VRAM (+4)448 GB/s (+16)

Raises estimated decode speed by about 36%.28.5 tok/s decode

Raises estimated decode speed by about 36%.

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

~$449 MSRP

RTX 5070 Ti 16GBBest value

16 GB VRAM (+4)896 GB/s (+464)

Raises estimated decode speed by about 36%.28.5 tok/s decode

Raises estimated decode speed by about 36%.

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

~$749 MSRP

Frequently asked questions

Can Radeon RX 6850M XT 12GB run Yi Coder 1.5B Chat?

Yes, Radeon RX 6850M XT 12GB can run Yi Coder 1.5B Chat with a C grade (Runs well). Expected decode speed: 21.0 tok/s.

How much VRAM does Yi Coder 1.5B Chat need?

Yi Coder 1.5B Chat (1.5B parameters) requires approximately 3.2 GB of memory with Q4_K_M quantization.

What is the best quantization for Yi Coder 1.5B Chat?

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

What speed will Yi Coder 1.5B Chat run at on Radeon RX 6850M XT 12GB?

On Radeon RX 6850M XT 12GB, Yi Coder 1.5B Chat achieves approximately 21.0 tokens per second decode speed with a time-to-first-token of 9219ms using Q4_K_M quantization.

Can Radeon RX 6850M XT 12GB run Yi Coder 1.5B Chat for coding?

For coding workloads, Yi Coder 1.5B Chat on Radeon RX 6850M XT 12GB receives a C grade with 21.0 tok/s and 818K context.

What context window can Yi Coder 1.5B Chat use on Radeon RX 6850M XT 12GB?

On Radeon RX 6850M XT 12GB, Yi Coder 1.5B Chat can safely use up to 818K tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.

See all results for Radeon RX 6850M XT 12GB See all hardware for Yi Coder 1.5B Chat

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