B300 SXM
HGX B300, Blackwell Ultra 8 GPU
| Indicative price | about €436k to €697k excl. VAT: 8-GPU HGX B300 server BIZON X9000 G5 listed at $496,728 excl. VAT on 2 September 2026 (November 2026 delivery) and Supermicro AS-8126GS-NB3RT listed at $795,000 excl. VAT at Vipera the same day, converted at the ECB rate of 25 September 2026, $1.1403 per €1 (price guide) |
|---|---|
| Memory | 288 GB HBM3e per GPU according to Lenovo, HPE and Supermicro, i.e. 2,304 GB; NVIDIA and Dell state 2.1 TB for 8 GPUs, about 270 GB per GPU |
| Bandwidth | 8 TB/s per GPU |
| Compute | 13.5 PFLOPS dense FP4 per GPU (108 total on the HGX B300 board, 144 with sparsity) |
| NVLink | NVLink 5, 1.8 TB/s |
| Power draw | 1,100 W per GPU air-cooled or 1,200 W liquid-cooled at Dell; about 14 kW for a complete DGX B300 (NVIDIA sheet) |
| Target | frontier models, long context |
What the machine runs
Inference and training of large models at scale. The largest open-weight models served with headroom, including mixture-of-experts and a one-million-token context. Recommended runtime: vLLM with KV cache offload.
Positioning
The high-end server adds 60% more memory per GPU over the B200 (288 GB versus 180 GB), for reasoning and long-context workloads. An eight-GPU configuration is listed from $496,728 to $795,000 excl. VAT at BIZON and Vipera on 2 September 2026, i.e. about €436k to €697k excl. VAT at the ECB rate of 25 September 2026.
Manufacturers
HGX B300 examples checked on 1 October 2026: Dell PowerEdge XE9780 and XE9785, HPE ProLiant Compute XD685, Lenovo ThinkSystem SR680a V4, Supermicro SYS-822GS-NB3RT, Cisco UCS C880A M8. ASUS and Gigabyte are named by NVIDIA as Blackwell Ultra partners, with no model checked here.
GPUDirect Storage
On platforms fitted with ConnectX cards, GPUDirect Storage technology establishes a direct path between NVMe or NVMe over Fabric storage and GPU memory, bypassing the CPU buffer. Compatible storage arrays, such as NetApp, VAST, DDN or WEKA, feed training and large-scale RAG at full speed.
Support
Open stack, maintained by its communities. NVIDIA AI Enterprise option (NIM, NeMo, Triton) with a service-level agreement, licensed per GPU.
Which models fit on B300 SXM?
The machine offers 2,304 GB of memory. 7 of the 7 open models in the catalogue load on it, in the format shown.
| Model | Billion parameters | Most precise format that fits | Sizing page |
|---|---|---|---|
| GLM 5.3 | 744 | FP16 | GLM 5.3 on B300 SXM |
| Kimi K3 | 2,800 | NVFP4 | Kimi K3 on B300 SXM |
| Kimi K2.7 Code | 1,000 | FP16 | Kimi K2.7 Code on B300 SXM |
| DeepSeek V4 | 1,600 | FP8 | DeepSeek V4 on B300 SXM |
| Nemotron 3 Ultra | 550 | FP16 | Nemotron 3 Ultra on B300 SXM |
| MiniMax M3 | 428 | FP16 | MiniMax M3 on B300 SXM |
| Qwen 3.8 27B | 27 | FP16 | Qwen 3.8 27B on B300 SXM |
See the full sizing matrix.
Frequently asked questions
How much does a configured b300 sxm cost for an LLM?
Pricing depends on configuration and supplier. The page shows a dated public price; a scoping call helps compare supplier quotes.
Which LLM fits in a b300 sxm?
Depends on the quantization format and the input context. The table on the page indicates the recommended maximum model size.
Which runtimes support the b300 sxm?
vLLM, llama.cpp, Triton Inference Server, depending on the chosen framework. The model, format and GPU combinations measured by QDNA are published in the measurements section.
Bizon X9000 G5 or a B300 SXM server from a certified vendor?
The BIZON X9000 G5 is an 8-GPU HGX B300 server listed at $496,728 excl. VAT on 2 September 2026 with November 2026 delivery. The Supermicro AS-8126GS-NB3RT is listed at $795,000 excl. VAT. Same HGX B300 platform and same 2,304 GB of memory; the price gap comes down to the integrator, its support and its lead time, to be compared on quotation.