RUNLOCALAIv38
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RUNLOCALAI · v38
← Back to Will-it-run

Custom build engine

Describe your build — any GPUs, CPU, RAM, OS, runtime, use case. We'll compute effective VRAM honestly, recommend a runtime, and tell you which models fit comfortably, which are borderline, and which aren't practical.

Total VRAM ≠ pooled VRAM. We never sum VRAM unless the silicon truly pools (Apple unified memory). We always explain why effective is lower than total.

Calculations follow the RunLocalAI Will-It-Run Framework: effective VRAM, model working set, runtime constraints, fit tiers, and measured-vs-estimated evidence labels.

Describe your build

Add GPUs, set CPU/RAM/OS, optionally pick a runtime + use case. URL updates as you change fields — share a build by copying the URL.

Build summary

Total VRAM
16 GB
Effective VRAM
~14 GB
range 13-14 GB
Topology
single gpu
none
Setup difficulty
beginner
speed penalty ~0%
Why effective VRAM is lower than total

Single NVIDIA GeForce RTX 5060 Ti 16GB — 16 GB VRAM minus ~1.8 GB runtime/driver overhead = ~14 GB usable for weights + KV cache + activations. The remaining uncertainty band covers OS display use and background CUDA allocations.

Measured evidence on this hardware

Publicly inspectable measured rows for the selected hardware slug(s). Exact measured rows calibrate the fit table instead of leaving it as pure VRAM estimation.

No publicly inspectable benchmark rows are attached to this exact hardware yet. The engine will still calculate fit and runtime, but speed rows will remain estimated.

Coding agents — agentic tool-call burst

Workload-specific bottleneck. Where this kind of work actually breaks first, and what to budget for.

Bottleneck: kv cache

Coding agents emit 5-15 tool calls per task. Each call carries the full agent system prompt + context. KV-cache budget for that prompt × concurrent requests is the limit. The decode side is well-served by any modern card; the prefill side bottlenecks first.

Budget for
  • •32K context with KV-cache room to spare (~3-4 GB on 4090 AWQ-INT4)
  • •Prefix cache: prefer SGLang for >5 tool calls / task
  • •Decode latency: aim for >40 tok/s sustained

Recommended runtime

Best engine for this topology + skill level + use case.

vLLM
primary
involved

AWQ-INT4 path fits 32B-class models on a 24 GB card with concurrent users. The production-default for self-hosted coding agents and multi-user serving.

ExLlamaV2
alternative
involved

Single-stream throughput king on consumer NVIDIA. EXL2 4.65bpw on a 4090 hits the highest tok/s in this class.

WORKLOAD PROFILE
FITS
Yi Coder 9B @ Q4_K_M, 8K context on NVIDIA GeForce RTX 5060 Ti 16GB
0 GB16 GBVRAM ceiling
Weights5.4 GB
KV cache4.5 GB
Activations0.3 GB
Runtime1.8 GB
Headroom4.0 GB
ESTIMATED DECODE RATE
58 tok/s
Bandwidth-derived estimate · efficiency 0.70. Real-world rates land within ±20% on well-tuned runtimes.
58 tokens per second02550100150

Models that fit your build

59 models considered (filtered by coding). Categorized by headroom at the recommended quant + a sensible context for your use case.

Comfortable
19 models · ≥15% headroom
ModelParamsQuantVRAM est.ContextEvidenceNote
Yi Coder 9B9BQ4_K_M10.2 GB8,192No measured row yetFits cleanly at Q4_K_M + 8,192 ctx with 27% headroom.
Llama 3.1 8B Instruct8BQ8_011.1 GB16,384No measured row yetFits cleanly at Q8_0 + 16,384 ctx with 21% headroom.
Gervásio 8B PTPT8BQ4_K_M6.6 GB4,096No measured row yetComfortable fit with 53% headroom — room to extend context or run alongside other workloads.
Qwen 2.5 7B Instruct7BQ8_09.5 GB16,384No measured row yetFits cleanly at Q8_0 + 16,384 ctx with 32% headroom.
CodeGemma 7B7BQ4_K_M7.9 GB8,192No measured row yetComfortable fit with 43% headroom — room to extend context or run alongside other workloads.
Codestral Mamba 7B7BQ4_K_M11.4 GB16,384No measured row yetFits cleanly at Q4_K_M + 16,384 ctx with 18% headroom.
CodeQwen 1.5 7B7BQ4_K_M11.6 GB16,384No measured row yetFits cleanly at Q4_K_M + 16,384 ctx with 17% headroom.
StarCoder 2 7B7BQ4_K_M11.6 GB16,384No measured row yetFits cleanly at Q4_K_M + 16,384 ctx with 17% headroom.
Salamandra 7B7BQ4_K_M7.6 GB8,192No measured row yetComfortable fit with 46% headroom — room to extend context or run alongside other workloads.
Qwen 2.5 Coder 3B3BQ4_K_M8 GB32,768No measured row yetComfortable fit with 43% headroom — room to extend context or run alongside other workloads.
StarCoder 2 3B3BQ4_K_M5.1 GB16,384No measured row yetComfortable fit with 63% headroom — room to extend context or run alongside other workloads.
ColPali v1.33BQ4_K_M1.8 GB0No measured row yetComfortable fit with 87% headroom — room to extend context or run alongside other workloads.
Salamandra 2B2BQ4_K_M2.4 GB8,192No measured row yetComfortable fit with 83% headroom — room to extend context or run alongside other workloads.
mxbai-rerank-large-v22BQ4_K_M4 GB32,768No measured row yetComfortable fit with 72% headroom — room to extend context or run alongside other workloads.
Qwen 2.5 Coder 1.5B2BQ4_K_M4.1 GB32,768No measured row yetComfortable fit with 71% headroom — room to extend context or run alongside other workloads.
Florence-2 Large1BQ4_K_M0.4 GB0No measured row yetComfortable fit with 97% headroom — room to extend context or run alongside other workloads.
GOT-OCR 2.01BQ4_K_M0.3 GB0No measured row yetComfortable fit with 98% headroom — room to extend context or run alongside other workloads.
SigLIP SO400M (patch14-384)0BQ4_K_M0.3 GB0No measured row yetComfortable fit with 98% headroom — room to extend context or run alongside other workloads.
Jina Reranker v2 Base Multilingual0BQ4_K_M0.2 GB1,024No measured row yetComfortable fit with 99% headroom — room to extend context or run alongside other workloads.
Borderline
5 models · tight, may need quant downgrade
ModelParamsQuantVRAM est.ContextEvidenceNote
OpenCoder 8B8BQ4_K_M13 GB16,384No measured row yetTight fit at Q4_K_M — only 7% headroom. KV cache for longer context will OOM. Cap context tighter or drop one quant level.
Qwen 3 8B8BQ4_K_M13.1 GB16,384No measured row yetTight fit at Q4_K_M — only 7% headroom. KV cache for longer context will OOM. Cap context tighter or drop one quant level.
DeepSeek R1 Distill Llama 8B8BQ4_K_M13 GB16,384No measured row yetTight fit at Q4_K_M — only 7% headroom. KV cache for longer context will OOM. Cap context tighter or drop one quant level.
EXAONE Deep 7.8B8BQ4_K_M12.3 GB16,384No measured row yetTight fit at Q4_K_M — only 12% headroom. KV cache for longer context will OOM. Cap context tighter or drop one quant level.
Qwen 2.5 Coder 7B Instruct7BQ6_K13.6 GB16,384No measured row yetTight fit at Q6_K — only 3% headroom. KV cache for longer context will OOM. Cap context tighter or drop one quant level.
Not practical
16 models · oversize for this build
ModelParamsQuantVRAM est.ContextEvidenceNote
Qwen 2.5 14B Instruct14BQ4_K_M16.4 GB8,192No measured row yet~16.4 GB needed at Q4_K_M + 8,192 ctx — overshoots effective VRAM by 17%. Drop quant or move to a larger build.
Qwen 2.5 Coder 14B Instruct14BQ4_K_M15.8 GB8,192No measured row yet~15.8 GB needed at Q4_K_M + 8,192 ctx — overshoots effective VRAM by 13%. Drop quant or move to a larger build.
Qwen 3 14B14BQ4_K_M15.8 GB8,192No measured row yet~15.8 GB needed at Q4_K_M + 8,192 ctx — overshoots effective VRAM by 13%. Drop quant or move to a larger build.
StarCoder 2 15B15BQ4_K_M17 GB8,192No measured row yet~17.0 GB needed at Q4_K_M + 8,192 ctx — overshoots effective VRAM by 21%. Drop quant or move to a larger build.
DeepSeek V3 Lite (16B MoE)16BQ4_K_M18 GB8,192No measured row yet~18.0 GB needed at Q4_K_M + 8,192 ctx — overshoots effective VRAM by 28%. Drop quant or move to a larger build.
DeepSeek Coder V2 Lite (16B)16BQ4_K_M18 GB8,192No measured row yet~18.0 GB needed at Q4_K_M + 8,192 ctx — overshoots effective VRAM by 28%. Drop quant or move to a larger build.
Codestral 22B22BQ4_K_M24.7 GB8,192No measured row yet~24.7 GB needed at Q4_K_M + 8,192 ctx — overshoots effective VRAM by 76%. Drop quant or move to a larger build.
Mistral Small 3 24B24BQ4_K_M26.7 GB8,192No measured row yet~26.7 GB needed at Q4_K_M + 8,192 ctx — overshoots effective VRAM by 91%. Drop quant or move to a larger build.
Devstral Small 2 24B24BQ4_K_M26.7 GB8,192No measured row yet~26.7 GB needed at Q4_K_M + 8,192 ctx — overshoots effective VRAM by 91%. Drop quant or move to a larger build.
Qwen 3.6 27B (MTP)27BQ3_K_M27.3 GB8,192No measured row yet~27.3 GB needed at Q3_K_M + 8,192 ctx — overshoots effective VRAM by 95%. Drop quant or move to a larger build.
Qwen 3 30B-A3B30BQ4_K_M33.9 GB8,192No measured row yet~33.9 GB needed at Q4_K_M + 8,192 ctx — overshoots effective VRAM by 142%. Drop quant or move to a larger build.
Sarvam 30B30BQ4_K_M24.8 GB4,096No measured row yet~24.8 GB needed at Q4_K_M + 4,096 ctx — overshoots effective VRAM by 77%. Drop quant or move to a larger build.
Gemma 4 31B Dense31BQ4_K_M34.4 GB8,192No measured row yet~34.4 GB needed at Q4_K_M + 8,192 ctx — overshoots effective VRAM by 146%. Drop quant or move to a larger build.
Qwen 2.5 32B Instruct32BQ4_K_M36 GB8,192No measured row yet~36.0 GB needed at Q4_K_M + 8,192 ctx — overshoots effective VRAM by 157%. Drop quant or move to a larger build.
DeepSeek R1 Distill Qwen 3 32B32BAWQ-INT436 GB8,192No measured row yet~36.0 GB needed at AWQ-INT4 + 8,192 ctx — overshoots effective VRAM by 157%. Drop quant or move to a larger build.
Qwen 3 Coder 32B32BAWQ-INT436 GB8,192No measured row yet~36.0 GB needed at AWQ-INT4 + 8,192 ctx — overshoots effective VRAM by 157%. Drop quant or move to a larger build.

Related

Multi-GPU buying guide →

NVLink vs PCIe, tensor- vs pipeline-parallel, mixed-card honesty.

Hardware combinations →

Curated multi-GPU / cluster setups with effective-VRAM math.

Setup path-finder →

OS + runtime install commands for your stack.

Compatibility matrix →

Runtime × OS × hardware support truth table.

Shopping a full build instead of a single card?

If you're sizing a fresh AI build (not just a card to drop into an existing system), the build-budget walkthroughs cover the whole BOM honestly: AI PC build under $1,000 or AI PC build under $2,000 cover the realistic 2026 budget tiers.

Vertical-fit shopping? AI PC for students covers the budget + portability tradeoffs; AI PC for developers covers the coding workflow specifics; AI PC for small business covers the document-RAG / always-on machine.

Form-factor first? See best laptop for local AI, best Mac for local AI, best mini PC for local AI, or best used GPU for local AI.

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