HGX B300 is NVIDIA's 8-GPU board that server makers such as Supermicro and Lenovo build their own B300 servers around; DGX B300 is NVIDIA's own complete server on the same eight GPUs. NVIDIA's product pages list the same GPU figures for both: 2.1 TB of GPU memory, 14.4 TB/s of NVLink and 108 PFLOPS of dense FP4, and both carry eight ConnectX-8 network cards. What differs is the server around them: who builds it, the CPU model, extra network cards, storage, cooling, software, support and price. Reserved through Ancapex on terms of two years or longer, an 8-GPU B300 server costs about $32,700 a month at the median rate of $5.60 per GPU-hour, our fee included (26 October 2026).
For a purchase, HGX against DGX is a choice of vendor and configuration. For a reservation it is a line to check in the quote: the operator owns the servers, and you rent GPU-hours on them.
| Spec | HGX B300 | DGX B300 |
|---|---|---|
| GPUs | 8 Blackwell Ultra SXM | 8 Blackwell Ultra SXM |
| GPU memory | 2.1 TB | 2.1 TB |
| NVLink, total | 14.4 TB/s | 14.4 TB/s |
| FP4 Tensor, sparse / dense | 144 / 108 PFLOPS | 144 / 108 PFLOPS |
| FP8 Tensor, sparse | 72 PFLOPS | 72 PFLOPS |
Sources: NVIDIA HGX and NVIDIA DGX B300 product pages. The DGX B300 user guide, Lenovo and Supermicro give 288 GB per GPU, 2.3 TB per server; all GPU specs are on B300 specs.
| HGX B300 servers | DGX B300 | |
|---|---|---|
| Who builds it | Server makers on NVIDIA's HGX board, each with its own models | NVIDIA |
| CPUs | Two Intel Xeon 6700-series, the model picked from the maker's list (Lenovo's SR680a V4 list includes the 6776P) | Two Intel Xeon 6776P |
| Network cards | Eight ConnectX-8 SuperNICs at up to 800 Gb/s; Supermicro's SYS-822GS-NB3RT adds up to two north-south cards of your choice | Eight ConnectX-8 at up to 800 Gb/s, plus two BlueField-3 DPUs at up to 400 Gb/s |
| Cooling and size | Air-cooled 8U (Supermicro SYS-822GS-NB3RT) or direct-to-chip liquid in 4U (Supermicro SYS-422GS-NB3RT-LCC) | Air-cooled, 10U |
| Power | Set by the build; each B300 GPU is rated up to 1,100 W in Lenovo's server | About 14 kW (product page); 14.5 kW, 15 kW system maximum (user guide) |
| Software | The maker's and the buyer's choice | DGX OS included; NVIDIA AI Enterprise and Mission Control recommended |
| Support | From the server maker | Three-year business-standard support from NVIDIA |
| Price | Supermicro's store lists SYS-822GS-NB3RT from $545,173.05; Lenovo gives $785,606.50 as the usual price of its SR680a V4 with eight B300 (15 June 2026) | No list price from NVIDIA; its page sends buyers to partners and a sales contact. Reported prices: B300 price |
Sources: NVIDIA DGX B300, DGX B300 user guide, NVIDIA data-center guide for DGX B300 (air cooling), NVIDIA HGX, Supermicro SYS-822GS-NB3RT, Supermicro SYS-422GS-NB3RT-LCC, Supermicro store, Lenovo SR680a V4, Lenovo TCO paper; seen 30 October 2026.
DGX B300 is NVIDIA's own design, with NVIDIA's software and support behind it. HGX B300 servers let you pick the maker, the CPUs, storage, liquid or air cooling and the support contract; a 4U liquid-cooled server takes less than half the rack space of a 10U one. What a server costs to buy and to run, and when reserving costs less: B300 price.
19 operators in our pipeline have current B300 offers (26 October 2026). On terms of two years or longer, reserved B300 costs about $5.60 per GPU-hour at the median, middle half $5.30 to $6.50 (11 priced offers from 8 operators), our fee included. For eight GPUs over a month of 730 hours that is about $32,700. Current start dates are on GPU availability.
The rate is per GPU-hour for the block, so ask which server stands behind it:
We ask operators whether they can cover your request without naming you, and introduce you to up to three. Price and terms come from the operator, and the operator pays our fee.
Requirements are handled confidentially. Your name stays with us until the operator signs our NDA and referral agreement. We reply within one business day from dima@ancapex.io.
HGX B300 is NVIDIA's 8-GPU board that server makers build their own servers around, with their own choice of CPU model, cooling and support. DGX B300 is NVIDIA's complete server on the same GPUs, with two Intel Xeon 6776P, two BlueField-3 DPUs, DGX OS and NVIDIA support.
NVIDIA's product pages list the same GPU figures for both: 2.1 TB of GPU memory, 14.4 TB/s of NVLink and 144 PFLOPS of sparse FP4 (108 dense). Differences come from the server around the GPUs: CPU model, storage, cooling and software.
No. NVIDIA's data-center guide describes DGX B300 as air-cooled, in 10 rack units. Some HGX B300 servers use direct-to-chip liquid cooling, for example Supermicro's 4U SYS-422GS-NB3RT-LCC.
Two Intel Xeon 6700-series processors in Supermicro's SYS-822GS-NB3RT and Lenovo's SR680a V4, the model picked from the maker's list. DGX B300 has two Intel Xeon 6776P, which is also on Lenovo's list.
About $32,700 a month for eight GPUs at the median of $5.60 per GPU-hour on terms of two years or longer, our fee included (26 October 2026).
