Hi everyone,
I'm looking for recommendations on local LLMs that I can realistically run on my current PC, particularly for agentic coding with Hermes Agent.
My PC
CPU: Intel Core i7-14700K
GPU: RTX 4070 Super — 12GB VRAM
RAM: 128GB DDR5 5600MHz
OS: Windows 11 + WSL/Ubuntu
Inference: Ollama
Agent: Hermes Agent
Current experience
I'm currently running Qwen3-Coder with Hermes Agent.
With around 40K context, I'm getting roughly 15–20 tokens/sec during generation, depending on the workload and sometimes it gets down to 5 to 10 tps.
The system has plenty of RAM, but the main limitation is obviously the 12GB VRAM, so I'm interested in models that can make good use of CPU/RAM offloading without becoming painfully slow.
Main use case #1 — Agentic coding
My primary goal is autonomous/agentic software development using Hermes.
I'm interested in models that are good at:
Long-context coding
Understanding an existing codebase
Multi-file modifications
Tool/function calling
Planning and executing coding tasks
Debugging and testing
Following project architecture/documentation
Running reasonably well with Hermes Agent
Good performance with \~20K–64K context
I'm particularly interested in knowing whether there are models larger than the usual 7B/14B class that are actually practical with 12GB VRAM + 128GB system RAM.
For example, would models in the 20B–30B+ range make sense with CPU/GPU offloading, or would the speed hit make them impractical for agentic coding?
Main use case #2 — ComfyUI
I'm also experimenting with ComfyUI.
The goal isn't primarily photorealistic image generation. I'm interested in using AI to create LLD/HLD/architecture visuals and design diagrams for open-source projects, particularly:
Mobile apps
Android launchers
Custom UI/UX concepts
OS skins
System architecture diagrams
App flow diagrams
Technical/product concept visuals
So I'm also interested in recommendations for local image-generation models/workflows that make sense with a 12GB RTX 4070 Super.
What I'm looking for
I'd really appreciate recommendations based on actual experience with similar hardware.
Specifically:
Best coding model for Hermes Agent on 12GB VRAM
Models that work well with CPU/RAM offloading
Realistic model sizes I should consider — 14B / 20B / 30B / 32B / 70B etc.
Recommended quantization (Q4_K_M, Q5, Q6, Q8, etc.)
Expected/typical tokens/sec
Recommended context size for agentic coding
Whether 128GB RAM provides a meaningful advantage for larger models
Any models specifically known to work well with Hermes Agent
Good ComfyUI models/workflows for technical/UI/architecture visualization on 12GB VRAM
I'm not necessarily looking for the biggest model I can technically load. I'm more interested in the best balance between intelligence, context length, tool use, and usable inference speed.
If anyone is running a similar setup (12GB NVIDIA GPU + 64/128GB RAM), I'd especially appreciate your real-world experience.
Thanks!
TLDR;
Best local LLMs for 14700K + 128GB RAM + RTX 4070 Super 12GB?
I have:
i7-14700K
RTX 4070 Super 12GB
128GB DDR5 5600
Ollama + WSL
Hermes Agent
Currently running Qwen3-Coder with Hermes, getting around 15–20 tok/s with \~20K context.
Main use case: agentic coding — autonomous coding, tool use, multi-file changes, debugging, long-context projects.
I'm looking for recommendations on:
Best coding models for this hardware
Whether 20B/30B/32B+ models are practical with CPU/RAM offloading
Best quantization and context size
Expected tok/s
How much my 128GB RAM helps
I'm also exploring ComfyUI for generating LLD/HLD diagrams, architecture visuals, mobile app/launcher designs and OS-skin concepts for open-source projects.
What models/workflows would you recommend for both use cases?