Ternary Bonsai 2 27B on NVIDIA Tesla P40 24 GB
27.36B on 24 GB at 346 GB/s. Hardware details · Model details
Yes. Ternary Bonsai 2 27B fits on NVIDIA Tesla P40 24 GB at the recommended
PTQ1_0 configuration, requiring approximately 7.2 GB at 8K context. Practical context capacity is 192K.CompatibilityComfortable
Calculated fit
Yes
Calculated Uses under 80% of usable memory. Room for a long context and other work.
Recommended quantization
PTQ1_0
Calculated gguf
Memory required
7.2 GB
Calculated of 22.1 GB usable — 33%
Max practical context
192K
Calculated model supports 256K
Memory budget at 8K context
Model weights ⓘ
5.5 GB Measured
KV cache ⓘ
0.5 GB Calculated
Runtime overhead ⓘ
1.2 GB Estimated
Total required
7.2 GB Calculated
Headroom ⓘ
14.9 GB Calculated
Smallest published ternary pack that leaves headroom: uses 33% of usable memory at 8K context.
Discrete GPU: 24 GB of VRAM, of which we assume 92% is usable after driver and context overhead.
Hybrid attention: token-growing KV memory is charged to 16 full-attention blocks. The linear-attention blocks also hold fixed-size state, so the memory estimate is approximate.
Performance
Estimated performance · recommended PTQ1_0
Decode, prefill and TTFT below are estimates for PTQ1_0. We do not have a comparable PTQ1_0 measurement on this machine.
Estimated decode
—
Estimated PTQ1_0; calculated range
Estimated prefill
—
Estimated PTQ1_0; calculated range
Estimated TTFT at 8K
—
Estimated PTQ1_0; calculated range
Hardware load reference
250 W
Official spec hardware TDP; not this model run
No throughput figures for this configuration. We do not estimate performance for a model that cannot load.
How the estimate is calculated
- Decode: reading 27.4B active parameters at 1.75 bits/weight takes 24.71 ms at 346 GB/s x 70% achieved efficiency.
- No FP16 compute figure for this hardware, so prefill cannot be estimated.
- This is a calculated estimate, not a measurement. It assumes a single request, a short prompt, no speculative decoding and a warm model already resident in memory.
Estimator version estimator_v1. Stored with every estimated row so old estimates can be regenerated when the model improves.
Submit a benchmarkSubmissions stay pending until reviewed.
This model at other quantizations on this machine
| Quantization | Resident | Disk | Total needed | Utilisation | Fit | Max context |
|---|---|---|---|---|---|---|
PTQ1_0recommended | 5.5 GB | 5.5 GB | 7.2 GB | 33% | Comfortable | 192K |
PQ2_0 | 6.7 GB | 6.7 GB | 8.4 GB | 38% | Comfortable | 192K |
Cost of running Ternary Bonsai 2 27B on this machineUnited States (federal) · C corporation · 8h/day
Monthly economic cost
$1
Calculated after tax
Codex/Claude Code
$100/mo
≈ $100/mo · local is $99 less
Net cash at purchase
$0
Calculated VAT not reclaimable
Total over 5 years
$86
Calculated after tax, after resale
Cost per USD/1M tokens
—
Calculated
The $100 comparison uses the Codex Pro 5x / Claude Max 5x plans. A fixed planning conversion is used for USD. This compares monthly spend only: subscriptions have usage limits, local hardware has different capabilities and constraints, and taxes or regional pricing may change the charged amount. Prices checked 7 September 2026.
Monthly breakdown
| Depreciation 0 over 5 years, straight-line to a 0 residual | $0.00 |
| Electricity 13.0 kWh/month at 0.140/kWh | $1.82 |
| Monthly cost before tax | $1.82 |
| Electricity tax shield Running costs are deductible business expenses | −$0.38 |
| Monthly economic cost after tax | $1.44 |
Three different numbers, deliberately
Cash cost
$0
Money that leaves the bank account on day one, net of reclaimable VAT.
Accounting depreciation
$0.00/month
$0 written down over 5 years to a $0 residual.
After-tax economic cost
$1.44/month
Depreciation plus running costs plus cost of capital, less the tax those deductions save. This is the figure to compare between machines.
Assumptions and sources (verified 2026-09-07)
VAT rate
0% Official spec
VAT recoverable
0% Official spec
Federal C-corporation estimate at the flat 21% rate. Pass-through entities should use the sole-proprietor estimate as a rougher proxy.
Effective deduction rate
21.00% Calculated
Headline marginal rate 21.00%.
Depreciation
5 years, straight-line Assumption
Residual value
$0 (15%) Assumption
Two GPU generations later, the card is worth a fraction of its list price.
Electricity
$0.140/kWh Assumption
Average power draw
74 W Calculated
Load 250 W for 20% of powered hours, idle 30 W for the rest — a machine that is on is not generating tokens the whole time.
Investment allowances
§179 100.0% Official spec
Worth $0 in total — first-year expensing that replaces later tax depreciation.
Cost of capital
not applied Assumption
- VAT rate: No US federal VAT · verified 2026-09-07
- Marginal tax rate: IRS Publication 542 — Corporations · verified 2026-09-07
- VAT recoverable fraction: site assumption · verified 2026-09-07
- Useful life: IRS Publication 946 — How To Depreciate Property · verified 2026-09-07
- Electricity price: Site assumption · 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.
Ternary Bonsai 2 27B on other hardware
| Hardware | Decode | Price | Fit |
|---|---|---|---|
| RTX 5090 workstation (1x 32 GB) | 121 t/s | $3,332 * | Comfortable |
| Used RTX 4090 workstation (24 GB) | 91.1 t/s | $2,071 * | Comfortable |
Nearest alternatives to the NVIDIA Tesla P40 24 GB
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