8 SFF PCs: Small, But Not So Quiet

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Technical Data Of Power Supply

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Manufacturer / Model	Shuttle PC40N250EV
Safety Standards	active PFC, CE, TÜV
Total Power	250 Watt max
AC Input	110 - 240 Volt, 50 / 60 Hz
Max output load	+ 3.3 V @ 18 A, + 5 V @ 19 A, + 12 V @ 16 A, + 5 Vsb @ 2.0 A
Fans	2x 40 mm
Motherboard connectors	1x 20-pin, 1x 12V ATXV2
Driver connectors	3x Peripheral plug for 5.25", 2x Peripheral plug for Serial-ATA, 1x Peripheral plug for 3.5"

As with almost all other shuttle models, the XPC SB77B5 works with a CPU cooling unit that diverts the heat quickly from the heat source. The four heatpipes end in a finned block that is ventilated with a 3.6" (92 mm) fan. The fan is controlled by the BIOS of the motherboard, which offers the user several settings. In a one-hour stress test, the fan seems unperturbed by the heat level generated. Even after an hour the noise level had hardly risen. The gauge showed barely 10 decibels more than after startup, except for the clamor of the fan when the XPC is turned on.