Let's go ahead and score this thing, starting with performance...
The ONLY knock on the performance of the Olympia OP650 is the low efficiency when the power supply was unrealistically crossloaded with a high +3.3V/+5V load and only 2A on the +12V. Other than that, efficiency was very good, there's active power factor correction, voltage regulation was very good, there was minimal ripple and noise and the unit was very quiet under 40�C.
Because the crossload that yielded the 73% was very unrealistic, I'm not going to hold it against it. In fact, I'm not going to hold much against this power supply. It scores a 10 for performance. That's makes up 40% of the score.
As for the functionality of this unit, we should take into consideration that it already has a correct 8-pin PCI-e connector on it, two of the 6-pin PCI-e connectors, 6 SATA, 6 peripheral connectors, the cables are fairly long. No, there aren't two 8-pin connectors or four 6-pin PCI-e connectors, but I think Silverstone is aware of the limitations of this unit as far as being able to put out enough power to support 8800GTX SLI or the forthcoming R600 Crossfire.
It is too bad that not all of the cables are sleeved, and that's a point against this unit. For functionality, I'm scoring this power supply an 8.5. This will make up 20% of the final score.
Now for aesthetics. Certainly, judging aesthetics is completely subjective. This is why it only makes up 10% of the final score.
The unit us compact and has a nice black finish. Nothing too shiny, no lights or anything and, like I said, not all of the cables are sleeved. I'll be giving the OP650 an 8 for aesthetics.
Finally, I'm going to judge the value of this unit. Basically, I'm going to look at what we have here in terms of performance and functionality and compare it against what I feel the product should sell for or what other products like it generally sell for. This makes up 30% of the final score.
Sundial Micro sells the OP650 for $129. Considering the Ultra X-Pro 600W and Seasonic S12 600W sells for $129 too, I'd say that puts the OP650 in VERY good company. You don't get modular cables, but you'd have to pay at least another $10 to $20 for that feature (Ultra X3 600W, Corsair HX620W or Seasonic M12 600W.) That means I'm going to give the OP650 a 9 for value!