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01.AIDense

Yi 1.5 34B RAM Calculator

For Yi 1.5 34B, plan about 32GB system RAM at Q4_K_M / 8K context for this 34B dense mid model (33K-token window). Yi 1.5 34B weights are available for local runtimes (llama.cpp / Ollama / vLLM class stacks) — buy kits you can fill with dual-channel DDR5 (or ECC RDIMM on true workstations).

01.AI's upgraded 34B dense open model delivering state-of-the-art coding and math capabilities in its class.

Specs verified from official source (2026-08-10). RAM estimates use GGUF-style Q4/Q8/FP16 math; native FP4/FP8 footprints can differ.

Standard Recommendation

32GB RAM

Calculated for 4-bit (Q4_K_M) @ 8K Context

1. Workload

Inference sizes run-time memory. Training adds optimizer/activation headroom and steers toward ECC.

2. Hardware path

CPU + RAM offload path: full model weights reside in system RAM (llama.cpp / similar). Dual-channel DDR5 bandwidth is the speed bottleneck.

3. Quantization

GGUF-style bit widths for planning. Native FP4/FP8 trainer footprints can differ.

4. Context length

Grows KV cache (inference) or activation scratch (training ballpark).

8,192 tokens
VRAM Hardware Sizing · 24GB VRAM Flagship GPU

Recommended GPUs for Yi 1.5 34B

⚡ 21.6 GB VRAM Required

Requires 24GB VRAM for 100% GPU offload. The 24GB VRAM capacity allows running 32B models or medium-quantized 70B models at full speed.

Undisputed $/VRAM Value King$749.99

GeForce RTX 3090 24GB GDDR6X (High-VRAM Workhorse)

VRAM: 24GB GDDR6X
Bus Width: 384-bit
Bandwidth: 936 GB/s
Cores: 10,496 CUDA

Technical Hardware Note: Features a massive 384-bit bus delivering 936 GB/s memory bandwidth. The undisputed best value per GB of VRAM for running local 32B-70B models.

Check Price & Availability on Amazon →
Ultimate Single-GPU Flagship$1799.99

ASUS ROG Strix GeForce RTX 4090 24GB GDDR6X Flagship

VRAM: 24GB GDDR6X
Bus Width: 384-bit
Bandwidth: 1008 GB/s
Cores: 16,384 CUDA

Technical Hardware Note: Breaks 1 TB/s memory bandwidth (1,008 GB/s) with 512 Tensor Cores, generating 15-30+ tokens/sec on 70B quantized models.

Check Price & Availability on Amazon →
💡
Technical Hardware Note: The RTX 3090 24GB ($750 refurbished) provides 936 GB/s bandwidth on a 384-bit bus, offering the single best dollar-per-VRAM value for local LLMs in 2026.

Inference bandwidth snapshot

DDR4 ~45 GB/s

2.4 t/s

DDR5 ~96 GB/s

5.0 t/s

Unified ~300 GB/s

15.7 t/s

VRAM ~1008 GB/s

52.8 t/s

Yi 1.5 34B Quantization Comparison Matrix

Side-by-side RAM, VRAM, and GPU requirements across 4-bit, 8-bit, and 16-bit precision (at 8K context).

QuantizationWeight SizeTarget RAMVRAM ClassRecommended Hardware
4-bit (Medium)Active19.1 GB32 GB Kit21.6 GB1x RTX 3090 (24GB) or RTX 4090 (24GB)
8-bit (High)36.1 GB64 GB Kit40.1 GB2x RTX 3090 (48GB combined VRAM) or Mac Studio 64GB
16-bit (Lossless)68 GB96 GB Kit74 GB4x RTX 3090 / 4090 (96GB VRAM) or Apple Mac Studio (128GB Unified Memory)
Local AI Deployment Quickstart

Run Yi 1.5 34B via Terminal (Ollama / vLLM)

🤗 Hugging Face Card →
Ollama CLI (Local Run):
ollama run yi-1.5-34b
vLLM OpenAI Server (GPU Offload):
python3 -m vllm.entrypoints.openai.api_server --model 01-ai/yi-1.5-34b-chat --gpu-memory-utilization 0.95
Host RAM target

32GB

Inference · CPU offload · Q4 K_M

32GB64GB96GB128GB192GB
Model weights:19.1 GB
KV cache:0.08 GB
OS / runtime:6 GB
Host total:25.2 GB

Kit picks (32GB)

Disclosure: As an Amazon Associate I earn from qualifying purchases. Rankings use price and spec data only — not paid placement. How we rank products

CORSAIR Vengeance RGB DDR5 RAM 32GB (2x16GB) Up to 6000MHz CL36-44-44-96 1.35V Intel XMP 3.0 Computer Memory – Black (CMH32GX5M2E6000C36)

UDIMM2-stick kit
$449.99$14.06/GBIn stock

Best match for dual-channel desktop boards (populate the recommended slots).

DetailsBuy on Amazon →

CORSAIR Vengeance RGB DDR5 RAM 32GB (2x16GB) Up to 6000MHz CL36-44-44-96 1.35V Intel XMP 3.0 Desktop Computer Memory - White (CMH32GX5M2E6000C36W)

UDIMM2-stick kit
$489.99$15.31/GBIn stock

Best match for dual-channel desktop boards (populate the recommended slots).

DetailsBuy on Amazon →

Patriot Viper Steel DDR4 RAM 32GB (2X16GB) 3600MHz CL18 Desktop Memory

UDIMM2-stick kit
$309.82$9.68/GBIn stock

Best match for dual-channel desktop boards (populate the recommended slots).

DetailsBuy on Amazon →

Kingston FURY Beast 32GB (2x16GB) 3600MT/s DDR4 CL18 Desktop Memory Kit of 2 KF436C18BBK2/32

UDIMM2-stick kit
$379.95$11.87/GBIn stock

Best match for dual-channel desktop boards (populate the recommended slots).

DetailsBuy on Amazon →

Timetec 32GB KIT(4x8GB) DDR3L / DDR3 1600MHz (DDR3L-1600) PC3L-12800 / PC3-12800 Non-ECC Unbuffered 1.35V/1.5V CL11 2Rx8 Dual Rank 240 Pin UDIMM Desktop PC Computer Memory RAM(SDRAM) Module Upgrade

UDIMMECC4-stick kit
$74.99$2.34/GBIn stock

Four sticks can stress the memory controller and lower stable XMP speeds on many consumer boards.

Confirm motherboard QVL / max capacity per slot before buying.

DetailsBuy on Amazon →

G.SKILL Ripjaws DDR4 SO-DIMM Series DDR4 RAM 32GB (2x16GB) Up to 3200MT/s CL22-22-22-52 1.20V Unbuffered Non-ECC Notebook/Laptop Memory SO-DIMM (F4-3200C22D-32GRS)

SO-DIMMECC2-stick kit
$199.95$6.25/GBIn stock

Laptop / mini-PC form factor — will not fit desktop DIMM slots.

DetailsBuy on Amazon →

Timetec 32GB KIT (2x16GB) DDR4 2666MHz (PC4-2666V) PC4-21300 SODIMM Laptop RAM – 260-Pin 1.2V CL19 Non-ECC Unbuffered Memory Module for Laptop, Notebook, Mini PC, All-in-One

SO-DIMMECC2-stick kit
$180.99$5.66/GBIn stock

Laptop / mini-PC form factor — will not fit desktop DIMM slots.

DetailsBuy on Amazon →
All 32GB prices →Check board fit in RAM Finder →

Why Yi 1.5 34B pressures system RAM

Yi 1.5 34B is a dense 34B network — every weight participates each token, so quantization choice dominates. Q4_K_M lands near ~19.1GB weights, plus ~0.08GB KV at 8K and ~6GB overhead (~25.2GB → 32GB kit). The 33K-token context ceiling is the sleeper cost: long-doc or agent traces inflate KV while the 34B slab stays fixed. Prefer dual-channel DDR5 bandwidth when CPU offload or mmap is involved.

What RAM kit to buy

A 32GB dual-channel kit is enough for quantized Yi 1.5 34B at modest context. Still prefer 2× matched SO-DIMM/UDIMM sticks; 1x RTX 3090 (24GB) or RTX 4090 (24GB) covers the 24GB VRAM Flagship GPU GPU profile. If you chat with long pastes, jump a tier before the KV cache forces paging.

Workload notes

Yi-family checkpoints like Yi 1.5 34B show up in bilingual local stacks — keep headroom for dual-language tokenizers and long chat history. At 34B, Yi 1.5 34B is a practical mid-size local model — sweet spot for single-GPU Q4/Q8 experimenters who still want headroom for IDE + Docker. Release window noted as May 2024; always re-check the official source before buying hardware for a specific checkpoint.

Next steps:32GB RAM pricesDDR5 RAM pricesCapacity comparisonRAM Finder

Technical Specifications

Total Parameter Count34 Billion
Active Parameters Per TokenDense (All active)
Maximum Context Window33K tokens
Primary Framework SupportOllama, llama.cpp, ExLlamaV2, vLLM

GPU & VRAM Sizing Profile

24GB VRAM Flagship GPU
Est. VRAM Required21.6 GB VRAM
Target GPU Hardware1x RTX 3090 (24GB) or RTX 4090 (24GB)

Hardware Profile: Requires 24GB VRAM for 100% GPU offload. The 24GB VRAM capacity allows running 32B models or medium-quantized 70B models at full speed.

Yi 1.5 34B Memory FAQs

How much RAM for Yi 1.5 34B at Q4 vs FP16?

At Q4_K_M with an 8K context we estimate ~32GB system kits for Yi 1.5 34B (weights ~19.1GB). FP16 jumps to roughly a 96GB kit class and often wants 21.6GB-class VRAM instead of host RAM alone — use the on-page calculator to retarget context and quant.

Does Yi 1.5 34B need dual-channel RAM?

Yes for local inference. Dual-channel DDR4/DDR5 (or wide LPDDR/unified memory) keeps prompt eval and CPU offload from hitching. A single stick often halves bandwidth and feels like a slow model even when capacity looks sufficient.

What GPU tier fits Yi 1.5 34B?

24GB VRAM Flagship GPU: target about 21.6GB VRAM (1x RTX 3090 (24GB) or RTX 4090 (24GB)). Requires 24GB VRAM for 100% GPU offload. The 24GB VRAM capacity allows running 32B models or medium-quantized 70B models at full speed.

Can I run Yi 1.5 34B with less than 32GB if I lower context?

Yes — shorter context shrinks KV (~0.08GB at 8K). Dropping to 2K–4K context can fit smaller kits, but keep OS headroom; paging kills tokens/s more than a slightly larger kit costs.

Same VRAM tier

Models that land in the same hardware profile (24GB VRAM Flagship GPU) at Q4 / 8K context.

Qwen3.6 35B A3BQwen3.5-35B-A3BQwen 3.6 35B-A3B (MoE)Qwen3 VL 32B InstructQwen3 32BQwen2.5 Coder 32B Instruct

Related Models

Qwen3.6 35B A3BQwen3.5-35B-A3BQwen 3.6 35B-A3B (MoE)Qwen3 VL 32B InstructQwen3 32BQwen2.5 Coder 32B InstructGemma 4 31BGemma 4 31B (Dense)