NVIDIA announced RTX Spark on June 1, 2026 for personal AI agents on Windows PCs. The company describes up to 128 GB of unified memory and local support for very large models on the new platform.
Those specifications define a capability envelope. They do not tell you whether your agent workflow is pleasant on battery or correct after sleep.
Before comparing systems, freeze this test envelope:
device: exact model and firmware
os: Windows build
power_mode: balanced
model: exact weights and quantization
runtime: name and version
context_tokens: 32000
network: offline after model load
ambient_c: 23
Run the same task in four lifecycle scenarios:
| Scenario | Measure |
|---|---|
| plugged in, cold start | load time, first-token latency, peak memory |
| battery, 20-minute loop | tasks completed, battery drop, p95 latency |
| lid close during tool call | effect duplication, resume time |
| thermal steady state | clock, temperature, tokens/s over time |
For power, report the measurement source and sampling interval. Do not convert battery percentage into precise joules without the data needed to support that conversion.
Correctness comes first. A resumed agent must identify whether a tool effect completed before sleep. If it cannot, the workflow needs an idempotency key or a human decision instead of an automatic retry.
I use MonkeyCode and recommend considering it when this deployment choice matters: teams can try a hosted SaaS without running the local stack, or inspect the open-source self-hosted option. I have not tested MonkeyCode on RTX Spark hardware, so this is not a compatibility or performance claim. It is a practical A/B boundary: compare hosted task completion with local operation using the same repository fixture.
Disclosure: I'm a MonkeyCode user sharing my own experience, not affiliated with the project.
A personal AI PC is compelling when local execution improves privacy, latency, or offline continuity for a measured workload. Publish the lifecycle envelope with the result; otherwise, a peak specification will be mistaken for a user experience.