Testing AI / High Density Datacentres

The IT Rack

The high power demands of AI compute, today sees power ratings from 140kW to 200kW for initial AI requirements, running from 400VAC. With the next generation of AI increasing beyond 300kW to 400kW, and 600kW+ with the electrical source being designed with 800VDC. Both situations utilise 48VDC rectifiers in the cabinet to power the IT compute.

This gives for present designs current rating of:

3000A DC - ~140kW - 4 x 33kW 48VDC power shelf rectifiers

4166A DC - ~200kW - 6 x 33kW 48VDC power shelf rectifiers

6250A DC - ~300kW - 9 x 33kW 48VDC power shelf rectifiers

8332A DC - ~400kW - 12 x 33kW 48VDC power shelf rectifiers

Which dictates the only way to commission or burn in the rectifiers willbe to utilise the IT loop to the manifold with a Chip Load Emulator.

This commissioning blueprint will allow the Power and the Cooling components of the next generation AI datacentre to be commissioned under full load stress tested conditions.

Integration testing of the AI datacentre

Testing only to the CDU secondary cooling loop is not sufficient to protect the AI GPU investment.

With the need for integrated commissioning testing for AI datacentres extending beyond the CDU cooling system infrastuture, The 20kW CLE emTRAY provides ‘burn-in’ testing of cabinet rectifiers up to 360kW in a 48U and utilises the cabinet rear manifold IT cooling loop to verify the CDU secondary cooling system flow rate and the supply and return temperature performance of the inline manifolds, server tray pressure and flow rates to the chip cold plate.

The 20kW CLE emTRAY is a 2U 19” OCP/MGX compatible emulator used for commissioning at pre-server installations. Each 2U 20kW CLE emTRAY provides dual inlet / outlet cooling feeds and power connections enabling up to 10kW per each 1U connection

The ability to dynamically to power and cooling systems will ensure future proof assurance of the AI datacentre.