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Rasurbo Real&Power RAP450 Review

Manufacturer: Rasurbo
UK price (as reviewed): £38.94 (inc VAT)
US price (as reviewed): Not Available

Rasurbo is another new name to have made it into this group test and, like Cougar, it’s based in Germany – the apparent spiritual home of PSU design. Rasurbo makes a range of power supplies, all of which are currently manufactured by HEC. The PSU that it sent to us, the esoterically titled Real&Power RAP450, retails for around £39, making it one of the cheapest PSUs in this Labs test.

The unit’s budget leanings are immediately apparent too – only the 24-pin ATX cable is braided, meaning that your PC will be filled with ugly, brightly coloured cables. The number of power connections on offer is also a little paltry, with only three SATA and three Molex connectors available. The Real&Power 450W redeems itself a little by having a pair of 6+2-pin PCI-E connections, however; other PSUs at this price point, such as the Corsair CX430 V2 and the Thermaltake SP-430, lack these connections.



Rasurbo has chosen to split the 12V power that the Real&Power 450W supplies over two rails, with 12V1 being rated at 22A and 12V2 rated at 20A; this means that the unit can supply 420W of its 450W claimed maximum over just its 12V rails if needs be. The division of connections between these two rails is a little unusual; all the SATA, Molex and 6+2-pin PCI-E connections, along with the 24-pin ATX socket, are on 12V1, leaving the 12V2 rail with just the 8-pin EPS12V socket to power.

This arrangement didn’t seem to trouble the Real&Power 450W, though, as it powered through all the tests we could throw at it, with both the 12V rails remaining well within the ATX spec when loaded at both 50 and 100 per cent.

Of slightly more concern was the 3.3V rail, which output just 3.19V at 100 per cent load. This is still within the boundaries of the ATX spec, but only by 0.05V, which is a little close for comfort.

Meanwhile, the Real&Power 450W’s efficiency was average for a PSU of this price. Its result of 86 per cent efficiency at 50 per cent load was acceptable and on a par with the Thermaltake SP-530, as was its result of 83 per cent at 100 per cent load. Unfortunately, the fan on the Rasurbo PSU was a little louder than that of the Thermaltake PSU when both were at 100 per cent load.

Our ripple test found the Rasurbo wanting, however, as its peak ripple amplitude was a whopping 76.3mV. This is still within the ATX spec but by far the worst result we’ve seen to date and makes the Rasurbo is undesirable on this front.

Add to this the fact that neither the 12V nor the 5V rail achieved the recommended 17ms result in our holdup testing and it’s clear the Real&Power RAP450 is best left on the shelf.