Can HelpingAI 15B i1 run on RX 6750 XT 12GB?

Q: What should I upgrade first if HelpingAI 15B i1 feels slow on RX 6750 XT 12GB?

Remove offload with more accelerator memory. Prioritize a GPU or unified-memory tier that fits the whole model natively. Removing offload usually helps more than small compute gains.

BARELY — Tight on Memory

D38Poor

Estimated from fit model

HelpingAI 15B i1 needs ~13.0 GB VRAM. RX 6750 XT 12GB has 12.0 GB. With Q4_K_M quantization, expect ~16 tok/s.

Runtime: llama.cppCapacity: OffloadBandwidth: LowStack: StandardBottleneck: Host offload

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) — 13.0 GB, 15.8 tok/s, Very compromised (needs ~0.7 GB host RAM)

13.0 GB required12.0 GB available

108% VRAM needed

1.0 GB over capacity — needs offload or smaller quantization

Fit status

Very compromised (needs ~0.7 GB host RAM)

Decode

15.8 tok/s

TTFT

12224 ms

Safe context

Memory

13.0 GB / 12.0 GB

Offload

10%

Memory breakdown

Weights9.2 GB

KV Cache1.8 GB

Runtime0.9 GB

Headroom1.2 GB

See how fast it feels

See how fast it feelsHelpingAI 15B i1 on RX 6750 XT 12GB
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: 15.8 tok/s decode · 12.2s TTFT (warm) · 40 tok/s prefill

What limits this setup

It fits through host-memory offload, and offload is the main reason performance drops.

CPU or host-memory offload is active

About 10% of the working set spills out of accelerator memory, which usually hurts latency and sustained decode throughput.

Very little memory headroom

You can run the model, but there is not much room left for longer context, bigger batches, extra apps, or future model updates.

Best improvement path

Remove offload with more accelerator memory

Prioritize a GPU or unified-memory tier that fits the whole model natively. Removing offload usually helps more than small compute gains.

Buy headroom, not only minimum fit

A slightly larger memory tier gives you safer context growth and makes the recommendation more future-proof.

Increase host RAM if you keep offloading

This setup may need roughly 0.7 GB of extra host RAM just for the offloaded portion, before OS and other tools.

Performance by workload

Workload	Grade	Fit	Decode	TTFT	Context
Chat	C	Runs with offload (needs ~0.1 GB host RAM)	18.3 tok/s	5755 ms	7K
Coding	D	Very compromised (needs ~0.7 GB host RAM)	15.8 tok/s	12224 ms	7K
Agentic Coding	F	Too heavy	12.1 tok/s	23218 ms	7K
Reasoning	D	Very compromised (needs ~0.7 GB host RAM)	15.8 tok/s	14447 ms	7K
RAG	F	Too heavy	12.1 tok/s	29023 ms

Quantization options

How HelpingAI 15B i1 (15B params) fits at each quantization level on RX 6750 XT 12GB (12.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	5.9 GB	Low	C52
Q3_K_S	3	7.4 GB	Low	C51
NVFP4Best for your GPU

Get started

Copy-paste commands to run HelpingAI 15B i1 on your machine.

Run

lms load hf-mradermacher--helpingai-15b-i1-gguf && lms server start

Upgrade options

Hardware that runs HelpingAI 15B i1 well

RX 7600 XT 16GBBudget pick

16 GB VRAM (+4)

Removes host-memory offload, which is usually the single biggest latency and throughput win.18.3 tok/s decode

Removes host-memory offload, which is usually the single biggest latency and throughput win.

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

~$329 MSRP

RX 9060 XT 16GBBest value

16 GB VRAM (+4)

Removes host-memory offload, which is usually the single biggest latency and throughput win.22 tok/s decode

Removes host-memory offload, which is usually the single biggest latency and throughput win.

Raises estimated decode speed by about 39%.

~$349 MSRP

RX 9070 16GBAMD upgrade

16 GB VRAM (+4)640 GB/s (+208)

Removes host-memory offload, which is usually the single biggest latency and throughput win.43.4 tok/s decode

Removes host-memory offload, which is usually the single biggest latency and throughput win.

Raises estimated decode speed by about 175%.

~$479 MSRP

Frequently asked questions

Can RX 6750 XT 12GB run HelpingAI 15B i1?

Yes, RX 6750 XT 12GB can run HelpingAI 15B i1 with a D grade (Very compromised (needs ~0.7 GB host RAM)). Expected decode speed: 15.8 tok/s.

How much VRAM does HelpingAI 15B i1 need?

HelpingAI 15B i1 (15B parameters) requires approximately 13.0 GB of memory with Q4_K_M quantization.

What is the best quantization for HelpingAI 15B i1?

The recommended quantization for HelpingAI 15B i1 is Q4_K_M, which balances quality and memory efficiency.

What speed will HelpingAI 15B i1 run at on RX 6750 XT 12GB?

On RX 6750 XT 12GB, HelpingAI 15B i1 achieves approximately 15.8 tokens per second decode speed with a time-to-first-token of 12224ms using Q4_K_M quantization.

Can RX 6750 XT 12GB run HelpingAI 15B i1 for coding?

For coding workloads, HelpingAI 15B i1 on RX 6750 XT 12GB receives a D grade with 15.8 tok/s and 7K context.

What context window can HelpingAI 15B i1 use on RX 6750 XT 12GB?

On RX 6750 XT 12GB, HelpingAI 15B i1 can safely use up to 7K tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.

What should I upgrade first if HelpingAI 15B i1 feels slow on RX 6750 XT 12GB?

See all results for RX 6750 XT 12GB See all hardware for HelpingAI 15B i1

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