When purchasing a new system or cluster, preparing the power requirements is integral. Power draw from the systems is key in addition to ensuring there is enough power available from the power source/circuit to fulfill the wattage needed.

System Power

All Exxact Systems feature auto-switching power supplies that can take 120V-240V. Most systems use the default power cables are C13 → Nema 5-15 or C13 → C14.

C13 → C14 C13 → NEMA 5-15

Electrical Circuits

Here is a chart of the most common circuits below.

Power that can be provided by each circuit. (Be Aware: there can be multiple outlets for a single circuit)

120V 20A NEMA 5-20 and L5-20 Electrical Outlets - up to 1920W

120V 30A NEMA L5-30 Electrical Outlets - up to 2880W

208V 20A NEMA L6-20 Electrical Outlets - up to 3328W

208V 30A NEMA L6-30 Electrical Outlets - up to 4992W

3-Phase 208V NEMA L21-20 Electrical Outlets - up to 5700W

3-Phase 208V CS 8365 Electrical Outlets - up to 14400W

Calculating Power Draw

In order to determine what circuit you need, you would first need to determine the amount of power draw coming from a system or cluster. Most components power consumption can be found online, typically from the manufacturer's site.

For example, we will examine the power draw for the:

Quantum TXR430-1500R (Deep Learning Solution)

http://exxactcorp.com/index.php/solution/solu_detail/198

Components that requires power listed below:

Parts Listing (Quantum TXR430-1500R - Deep Learning Certified System)
Description	Quantity	Power Draw @ Max
Quantum TXR430-1500R - 4U Intel Dual CPU Chassis, 24x 2.5IN Hot-Swap HDD Bays, Supports Up To 2x E5-2600 v3 CPU, Dedicated IPMI Port, 8x PCIE 3.0 x16 Slots, Up To 512GB DDR3 1866MHz ECC/REG Memory, 1600W Redundant Power Supplies	1	~115W
Intel® Xeon® processor E5-2620 v4, 8C, 2.1 GHz 20M, 85W	2	85W Per
16GB DDR4 2400MHz ECC Registered 1.2V Memory Module (128GB system memory)	8	~5-10W Per
1TB 2.5 SATA III Internal Solid State Drive (SSD) (OS drive)	1	<1W
NVIDIA Tesla M40 24GB GDDR5 PCIe 3.0 - Passive Cooling	8	250W per
Total Power Requirement		~1366W

Cooling

To calculate the appropriate amount of cooling required for a single system or cluster, use the following:

P_(BTU/hr) = 3.412141633 × P_(W)

So

1W = 3.412141633 BTU/hr

For the Example of the Dev Box above,

P_(BTU/hr) = 3.412141633 × 1366W

P_{(BTU/hr) = 4660.9855 (BTU/hr)}

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