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VR-Zone Exclusive: SilverStone SST-ST45SF 450W SFX PSU Reviewed

Wanting to know how hardy the SST-45SF is, we unplugged the (1200W) Antec Quattro 1200 from our test rig and sited the SST-ST45SF atop the Antec monstrosity. After some rabid connector swaps, we had the SST-ST45SF in place and ready for testing.



You can see in the pictures that the SST-45SF is really one small piece of kit compared to the Antec Quattro 1200 it sits on. Our load for today is based around the Intel DX58SO/Core i7-980X mainboard/CPU combination and a XFX Radeon HD 5870 graphics accelerator. The Windows 7 Ultimate Operating System (OS) and various benchmarks were hosted on a Kingston SNV225-S2/256GB Solid State Drive (SSD). Memory came from ADATA; a DDR3-1866+ Triple Channel Kit.


Part one of the test was finding out how much power the SST-45SF could pass before protection kicked in. In simpler terms, we wanted to know how much overloading the PSU could handle. Knowing that the test rig was slightly friendly with +3.3V/+5V current consumption (we’re only using one SSD and no mechanical drives), we bumped up every available voltage option available on the mainboard (buck regulators for the memory and chipsets switch from +3.3V/+5V rails) and proceeded to raise GPU voltage with the fantastic MSI Afterburner software. With the 3.6GHz CPU running 12 threads of Prime95 we fired up FurMark and gradually raised GPU voltage (this loads the +12V rail) until the SST-ST45SF decided that it was time for a safety cutoff. We recorded 586.9W of peak power draw off the socket.



Before you breath a sigh of relief for the SST-ST45SF’s safe escape from catastrophic destruction, the tenderly executed overload test described above was merely for us to decide a long term load value for The Acid Test. Launching IntelBurn Test alongside Prime95 and FurMark, we inched up on GPU and gDDR clocks until we managed approximately 530W of power draw off the socket. We then left the system to cook at a room ambient of approximately 24 Celsius. Crash and burn, baby!




We returned the next day to a rather warm test environment (with current generation hardware, we do feel a need for better air-conditioning in the local climate). The system was still humming along nicely, and the PSU fan had spun up to audible levels. Peak power draw recorded was 550.6W.


Not too bad!


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