Seventeam V-Force ST-750P-AF PSU review

Page 3 - Tests

Test system

The computer we tested Seventeam V-Force ST-750P-AF with, is the best available to us, being at the same time one of the most powerful and not so mainstream gaming machines.

• Motherboard: ASUS M4AT79 Deluxe
• Processor: AMD Phenom II 955 Black Edition
• Video cards: 2 x HD 4890 DDR5 1GB Sapphire
• Memory: 2 x 2GB DDR3 1600MHz Corsair
• Hard drive 1: Western Digital Velocity Raptor 10 000 RPM 150GB
• Hard drive 2: Seagate Barracuda 7200.11 7200RPM 300GB
• Optical drive: Optical ASUS DVD+/-RW 20x
• Cooler: 4 case fans

PSU's tested and compared

• In Win Commander 750W
• Hipro 580W
• Seventeam ST-750P-AF
• Cooler Master Real Power 1000W
• Raptoxx Exxtreme Series RT-EBAD1200 1200W

Testing methodology

Tests for PSU voltages in idle and under load modes were made with the above mentioned configuration. Later we decided to run tests for energy efficiency with few more PSU's, in which test we would measure the amount of power consumed from the system while performing the exactly same operations with the exactly same hardware but with different PSU. That would show with great preciseness the difference in effectiveness of the "80+" models that were in the ModReactor lab.

For the tests we used a good multimeter. We measured the power consumed with a plain home Power Meter, that can be obtained anywhere for about 12$ - 20$ and has accuracy of +/- 1W, which is quite acceptable.

Results

Seventeam V-Force ST-750P-AF voltages aren't the most stable. Its +12V line is a tad high, though still within ATX standard values, same goes for the 5V line, only its +3.3V line is close to standards. Overall - sable, though not top-notch performance.

Now let's see how much power does Seventeam V-Force ST-750P-AF consume

Same picture here. Seventeam V-Force ST-750P-AF is performing as a mid-class product.

Random thoughts

Seventeam V-Force ST-750P-AF has only two 12V lines, unlike its competitors, which have 4 or even 6. That is quite an achievement, available only in very few, expensive products. Yes, its not a single line yet, but Seventeаm engineers are working on it no doubt. The advantage of having less 12V lines is best seen when the PSU is used at its maximum. If the power is divided between 4 or 6 lines its a lot easier to overload one of them with a component such as ultra-powerful dual-core video card. That is why expensive models are trying to use as few lines as possible, even though that reflects directly at the price. So, even though Seventeam V-Force ST-750P-AF efficiency is not very high, our overall opinion of it is positive.

The additional peripheral capability is somewhat limited by the amount of connectors present (6 SATa devices and only 4 PCI-E connectors). Indeed, should you use only 2 high-end cards, everything will be fine, but should you have 3 of them some adapters will be needed.

As for the noise – the PSU is very quiet even under the full load, we managed to put it under. That's a definite plus!