Cerebras CS-3 Rack
The Cerebras CS-3 Rack packages two CS-3 systems into a single 48 RU cabinet measuring 600 mm by 1200 mm, drawing 54 kW in total: 50.4 kW carried by water and 3.6 kW by air. Networking is eight QSFP-DD transceivers at 4x100G, with a 1 GbE management port, a console port and a PoE flow controller interface. Power is 2+1 redundant at 240V/415Y, three phase, 60 A on IEC 60309 plugs, and water couples through 1.5 inch sanitary fittings with two pairs of supply and return. Between them the two engines hold 88 GB of on-chip SRAM and no DRAM. Cerebras publishes 125 petaFLOPS per engine but footnotes that figure as sparse, and the sparsity is unstructured, so no dense figure is derived.
We will point you at suppliers who have it. Free, and no signup.
System Details
GPU Configuration
System Specifications
Powered by Cerebras WSE-3
This system utilizes 2 × Cerebras WSE-3 GPUs, each delivering exceptional performance for AI and HPC workloads.
Per GPU TDP
—
Per GPU Memory
—
Process Node
TSMC 5nm
Architecture
Wafer Scale Engine 3
Frequently asked questions
How much does the CS-3 Rack cost?
Cerebras sells the CS-3 Rack on quote through OEMs and resellers, and Flopper has no live rental listing for its WSE-3 accelerator to derive an hourly figure from. System rental pricing →
How much power does the CS-3 Rack require?
Cerebras rates the CS-3 Rack at 54 kW, which is the figure to plan power delivery and cooling around; per-GPU draw is listed on the accelerator's own page.
How many GPUs are in the CS-3 Rack?
2. The CS-3 Rack carries 2 Cerebras WSE-3 accelerators in a rack form factor, and every throughput figure on this page is the total across them. WSE-3 specifications →
Documentation & Resources
Need this system?
Tell us the quantity, timeframe and region. We reply by email with who can supply it.
Flopper Spec Sheet
Cerebras CS-3 Rack specifications, generated from our database. Printable.
Vendor product page
Cerebras CS-3 Rack documentation
Cerebras CS-4 datasheet
Cerebras • 2026-08-18
Typical Use Cases
The Cerebras CS-3 Rack runs 2× WSE-3 GPUs over 8x QSFP-DD transceiver, 4x100G; 214 Pb/s on-wafer fabric per engine.