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Apple Mac Studio M3 Ultra / M4 Max enclosure, front view
Model photo. Exact board, memory configuration, and included accessories depend on the retailer listing.

AI desktop

Apple Mac Studio (M4 Max, 128GB)

128 GB of unified memory · 546 GB/s

Lowest tracked refurbished price

$5,224.05View at eBay

Checked refurbished

Compare all retailer offers

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Where to buy

Some links are affiliate links. Prices change constantly, so confirm the exact configuration, condition, shipping, and final total at the retailer before buying.

Recorded catalog price

$5,224

$41 per GB of memory

0.10 GB/s per dollar

Recorded . In stock at that check. Retailer offers above may differ by condition or configuration.

Specs

Memory
128 GB
Memory bandwidth
546 GB/s
FP16 compute
Not published
INT8 compute
Not published
Whole-machine power
Not published
MSRP
Not published
Memory architecture
Unified with the CPU

Fields marked "not published" are ones the vendor does not state. We leave them blank rather than estimate.

Board power covers the GPU card alone; whole-machine power covers the complete computer. A card's rating excludes the rest of the system. See our power, cooling, and noise guide for power-supply planning.

What it can run

Whether a model's weights fit in 128 GB, with a 20 percent allowance for the KV cache, activations, and the runtime. This is arithmetic on the quantization format, not a benchmark. Long contexts and large batches need more.

At Q4, the smallest format below, 20 of the 25 models we size fit on this machine.

Model Q4 (4-bit) ? Q5 (5-bit) Q8 (8-bit) FP16
Qwen3.5-0.8B (0.8B) Fits Fits Fits Fits
LFM2.5-1.2B-Thinking (1.17B) Fits Fits Fits Fits
Qwen3.5-2B (2B) Fits Fits Fits Fits
SmolLM3-3B (3B) Fits Fits Fits Fits
Qwen3.5-4B (4B) Fits Fits Fits Fits
Gemma 4 E4B (8B) Fits Fits Fits Fits
Qwen3-8B (8.2B) Fits Fits Fits Fits
Qwen3.5-9B (9B) Fits Fits Fits Fits
Gemma 4 12B (11.95B) Fits Fits Fits Fits
gpt-oss-20b (21B) Fits Fits Fits Fits
Mistral Small 3.2 24B (24B) Fits Fits Fits Fits
Gemma 4 26B-A4B (25.2B) Fits Fits Fits Fits
Gemma 3 27B (27B) Fits Fits Fits Fits
Qwen3.5-27B (27B) Fits Fits Fits Fits
Qwen3.8-27B (27B) Fits Fits Fits Fits
Gemma 4 31B (30.7B) Fits Fits Fits Fits
Qwen3.5-35B-A3B (35B) Fits Fits Fits Fits
Llama 3.3 70B Instruct (70B) Fits Fits Fits No
gpt-oss-120b (117B) Fits Fits No No
Qwen3.5-122B-A10B (122B) Fits Fits No No
Qwen3-235B-A22B (235B) No No No No
DeepSeek-V4-Flash-0731 (284B) No No No No
DeepSeek-V3 (671B) No No No No
GLM-5.1 (744B) No No No No
Kimi K3 (2800B) No No No No

Price history

33 recorded checks. Low $4,980, high $7,300.

2026-08-17 to 2026-10-01 Low $4,980 · High $7,300 -28.4% over the period

Recent checks

Related hardware

Closest memory capacity to this one, which is what decides whether the same models load.

Sources

Every spec here is recorded from a vendor page we fetched. See our methodology for how prices and specs are sourced.