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NVIDIA BlueField-4 STX server adds single Vera CMX board

The Die Brief Desk, after servethehome.com

ServeTheHome's OCP 2026 page shows the BlueField-4 STX Server as a single Vera, SOCAMM-based board aimed at context memory, smaller than the earlier dual-Vera DPU.

NVIDIA BlueField-4 STX Server for CMX at OCP 2026 2 Large — Picture from servethehome.com
NVIDIA BlueField-4 STX Server for CMX at OCP 2026 2 Large — Picture from servethehome.com
BlueField-4 STX ServerBlueField-4 DPU
CPUsingle Vera packagedual Vera CPU setup
MemorySOCAMM memorySOCAMM memory
SuperNICsfour ConnectX-9 SuperNICs
Board sizeroughly the size of an Intel DMR 16-channel socket or a 16-channel AMD EPYC Veni
M.2 slotM.2 slot
Costlower-cost designmore costly than a BlueField-1 or BlueField-3

ServeTheHome's OCP 2026 page puts the BlueField-4 STX Server for Context Memory on a single Vera package, with SOCAMM memory and an M.2 slot. A lower-cost design than the earlier dual-Vera BlueField-4 DPU, which had SOCAMM memory and four ConnectX-9 SuperNICs, is the point of the new board. Board area is compared to a 16-channel Intel DMR socket or a 16-channel AMD EPYC Venice platform.

Wire desk added that no ConnectX-9 SuperNIC appeared in the OCP 2026 photos, which is a useful negative but not a proof of the network path. Its framing as a storage-side move for partners building CMX nodes matches the page's emphasis on lower cost rather than DPU performance. That framing is fair, because the page does not claim a new DPU performance class.

NVIDIA BlueField-4 STX Server for CMX at OCP 2026 5 Large — Picture from servethehome.com
NVIDIA BlueField-4 STX Server for CMX at OCP 2026 5 Large — Picture from servethehome.com

Die Brief's judgment is that the constrained party is the partner, not the silicon. The document proves a cheaper single-Vera board exists, but it does not prove memory capacity, power draw, core count, or a working network path. For a buyer, that means the CMX node is still a bill of materials, not a priced system.

NVIDIA BlueField-4 STX Server for CMX at OCP 2026 3 Large — Picture from servethehome.com
NVIDIA BlueField-4 STX Server for CMX at OCP 2026 3 Large — Picture from servethehome.com

Soldered CPU and LPDDR5X choices change the assembly story. Page says the design is less like a traditional motherboard replacement and more like something easy to assemble automatically. It matters for a fab or integrator, because the board is still being pushed toward a repeatable CMX node rather than a custom DPU card.

NVIDIA BlueField-4 STX Server for CMX at OCP 2026 1 Large — Picture from servethehome.com
NVIDIA BlueField-4 STX Server for CMX at OCP 2026 1 Large — Picture from servethehome.com

Power draw, core count, memory capacity, exact board dimensions, price, and SKU are not in the document. Missing ConnectX-9 in the photos leaves the external network path unverified. Until those figures appear, the launch is a platform shape, not yet a measured system.

The constrained party is the partner, because the page proves a cheaper single-Vera board but not a complete CMX node. Buyers should treat it as a platform shape until power, memory capacity, and network path are measured.

The single-Vera STX board lowers BOM cost versus the dual-Vera DPU, but the missing ConnectX-9, memory capacity, power, and SKU keep the CMX node unverified. It is a storage-side platform, not a measured system.

After servethehome.com. We did not report this. The pictures, if any, are theirs.

October 20, 2026 · 2 min
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