Tenstorrent TT-QuietBox 2 (Blackhole)
The TT-QuietBox 2 is Tenstorrent's liquid-cooled desk-side tower: two p300c cards carrying four Blackhole ASICs (480 Tensix cores, 128 GB GDDR6 in total) behind an AMD Ryzen 7 9700X host with 256 GB of DDR5, on a 1,600 W supply that plugs into a standard 120 V outlet. At $9,999 it is the cheapest packaged way to get 128 GB of accelerator memory with a vendor-supported open-source stack, and Tenstorrent says it runs open-weight models up to about 120B parameters on the box. The trade-offs are a non-CUDA software stack, four separate 32 GB devices rather than one memory pool, and a peak draw near 1,500 W, which is a lot for a desk circuit. It replaces the first Blackhole QuietBox (four p150c cards, $11,999, now sold out).
- 128 GB is four 32 GB islands, not one pool. A 120B model has to be split across the four chips with TT-NN multi-device code; it is not the same as a 128 GB unified-memory box where any process sees all of it.
- Peak draw of about 1,500 W on a 120 V outlet is roughly 12.5 A, above the 12 A (80%) continuous load usually allowed on a 15 A household circuit (our arithmetic). Put it on a dedicated 20 A circuit for sustained inference.
- Each p300c is rated 600 W, so the two cards alone account for up to 1,200 W of the budget; the 8-core Ryzen host is sized to feed the accelerators, not to do heavy CPU work.
- The 2,654 TFLOPS figure is BLOCKFP8 and the 476.5 tokens/s Llama 3.1 70B figure comes without a batch size; neither compares directly with NVIDIA FP8 or FP4 numbers. Benchmark your own model on the shipped software release.
- Buy it to develop on Tenstorrent's open stack or to run a supported open-weight model privately at a desk. For CUDA tooling or the widest day-one model support, a GB10 or RTX-class box is the lower-risk choice.
What is inside the TT-QuietBox 2?
Two liquid-cooled Blackhole p300c cards with four Blackhole chips in total (480 Tensix cores, 720 MB SRAM, 128 GB GDDR6), an AMD Ryzen 7 9700X host, 256 GB DDR5-5600, a 4 TB PCIe Gen5 NVMe drive and a 1,600 W power supply, in a tower that weighs 20 kg.
How much does the QuietBox cost?
The TT-QuietBox 2 lists at $9,999 on Tenstorrent's store. The earlier Blackhole QuietBox (four p150c cards) listed at $11,999 and the Wormhole QuietBox at $15,000; both are shown as sold out.
What models can it run?
Tenstorrent says open-weight models up to about 120B parameters, citing GPT-OSS 120B on-device and 476.5 tokens/s on Llama 3.1 70B (vendor figures, batch size not stated). Each model needs support in Tenstorrent's TT-Metalium/TT-NN stack, so check the supported-model list first.
Can it run from a normal wall socket?
Yes, Tenstorrent says it plugs into a standard 120 V outlet and needs no rack. Peak draw is about 1,500 W, though, so a dedicated circuit is the safer setup for sustained load.