Mac Studio M2 Ultra 192 GB vs Mac Studio M3 Ultra 256 GB
M2 Ultra has 192 GB memory, 800 GB/s bandwidth; M3 Ultra has 256 GB memory, 819 GB/s bandwidth, 270 W nominal power. Compare model compatibility, like-for-like tokens/sec and ownership cost below.
Verdict
- throughputNo valid like-for-like performance comparison is available. The practical configurations below differ in quantization, runtime, context, settings, or evidence type, so their speed difference must not be attributed to hardware alone.
- capacityBoth machines run all 8 compared models in their best practical configurations. Compare their quantizations and evidence labels before treating any throughput difference as a hardware result.
- costAt 8 hours a day, the Mac Studio M2 Ultra 192 GB has approximately 100% lower total monthly cost ($0 against $60), for a C corporation in United States (federal).
- evidenceThere are no comparable throughput rows, so this page makes no hardware-speed ranking. Practical deployment figures remain useful for fit planning but answer a different question.
- recommendationThroughput is close enough to be a wash, so this comes down to cost and capacity: the Mac Studio M2 Ultra 192 GB is cheaper to own, and capacity differences above decide which models you can run at all.
Every statement above is generated from the calculations on this page by fixed rules — no prose is written for individual comparisons. If the numbers change, the verdict changes with them.
Hardware
| Mac Studio M2 Ultra 192 GB | Mac Studio M3 Ultra 256 GB | |
|---|---|---|
| Purchase price estimate | — | $5,674 * |
| Memory | 192 GB | 256 GB |
| Memory bandwidth | 800 GB/s | 819 GB/s |
| Usable bandwidth indicator | 560 GB/s (70%) | 580 GB/s (71%) |
| Nominal power | — | 270 W |
| Measured load power | — | 195 W |
| Idle power | — | 12 W |
| Architecture | unified memory | unified memory |
Like-for-like performance0 comparable models
Ternary Bonsai 2 27BDeepSeek-V4.1 FlashDeepSeek-V4 FlashDeepSeek Coder V2 236B-A21BDeepSeek V2 236B-A21BDeepSeek V2.5 236B-A21BQwen3 235B-A22BStep 3.7 Flash 198B-A11B
| Model | Mac Studio M2 Ultra 192 GB | Mac Studio M3 Ultra 256 GB | Winner |
|---|---|---|---|
| Ternary Bonsai 2 27B 27.36B | — no matched configuration | — no matched configuration | Not comparable |
| DeepSeek-V4.1 Flash 763.205B (16B active) | — no matched configuration | — no matched configuration | Not comparable |
| DeepSeek-V4 Flash 304.18B (13B active) | — no matched configuration | — no matched configuration | Not comparable |
| DeepSeek Coder V2 236B-A21B 235.741B (21B active) | — no matched configuration | — no matched configuration | Not comparable |
| DeepSeek V2 236B-A21B 235.741B (21B active) | — no matched configuration | — no matched configuration | Not comparable |
| DeepSeek V2.5 236B-A21B 235.741B (21B active) | — no matched configuration | — no matched configuration | Not comparable |
| Qwen3 235B-A22B 235.094B (22B active) | — no matched configuration | — no matched configuration | Not comparable |
| Step 3.7 Flash 198B-A11B 201.365B (11B active) | — no matched configuration | — no matched configuration | Not comparable |
Hardware deltas are calculated only when quantization, runtime, exact context, execution/decode mode and relevant inference settings match. Measured and estimated results are never compared to each other. A difference under 10% is reported as a tie.
Best practical configuration
| Model | Mac Studio M2 Ultra 192 GB | Mac Studio M3 Ultra 256 GB | Practical result |
|---|---|---|---|
| Ternary Bonsai 2 27B | — PTQ1_0 · estimated | — PTQ1_0 · estimated | Both fit; configurations may differ |
| DeepSeek-V4.1 Flash | — DS4 V4.1 Q2 (SSD) · estimated | — DS4 V4.1 Q2 (SSD) · estimated | Both fit; configurations may differ |
| DeepSeek-V4 Flash | — DS4 Q2 (mixed) · estimated | ~51.8–74.5 t/s MLX 4-bit · estimated | Both fit; configurations may differ |
| DeepSeek Coder V2 236B-A21B | — Q4_K_M · estimated | — Q5_K_M · estimated | Both fit; configurations may differ |
| DeepSeek V2 236B-A21B | — Q4_K_M · estimated | — Q5_K_M · estimated | Both fit; configurations may differ |
| DeepSeek V2.5 236B-A21B | — Q4_K_M · estimated | — Q5_K_M · estimated | Both fit; configurations may differ |
| Qwen3 235B-A22B | — Q4_K_M · estimated | ~25–36 t/s Q5_K_M · estimated | Both fit; configurations may differ |
| Step 3.7 Flash 198B-A11B | — MLX 4-bit · estimated | ~48.6–69.9 t/s Q5_K_M · estimated | Both fit; configurations may differ |
This is a deployment comparison: each machine uses its own recommended configuration. Different quantizations can change speed and quality, so these figures are not raw hardware benchmarks.
Economics — United States (federal), C corporation, 8h/day
| Mac Studio M2 Ultra 192 GB | Mac Studio M3 Ultra 256 GB | |
|---|---|---|
| Purchase price estimate | — | $5,674 |
| Reclaimable VAT | $0 | $0 |
| Net cash at purchase | $0 | $5,674 |
| Monthly depreciation | $0.00 | $66.20 |
| Monthly electricity | $0.00 (0 kWh) | $1.20 (9 kWh) |
| Tax programme | §179 100.0% | §179 100.0% |
| Tax-programme benefit | $0 | $1,192 |
| Monthly economic cost | $0.00 | $59.58 |
| Total over 5 years | $0 | $3,575 |
Purchase prices are localized inputs in USD: tax/VAT excluded for Mac Studio M2 Ultra 192 GB and tax/VAT excluded for Mac Studio M3 Ultra 256 GB. Net cash and monthly economic cost then apply the selected United States (federal) / C corporation tax treatment. Tax assumptions last verified 2026-09-07. Federal planning estimate only, not tax advice. State and local income tax, sales/use tax and incentives are excluded. It assumes 100% business use, a Section 179 election, enough business income to use it, and that the full annual limit remains available.