EVGA 450BV 450W Power Supply

PROD LINK: 450BV Product Page
PRICE: $34.99 @ EVGA
Price is at time of testing!

Now, we get to the fun part… load testing. As always, the FastAuto will be loading things while the rest of the usual test gear makes all the measurements. I do hope that I still have a working power meter and load tester after this. I’m not convinced at all that this is a gutless wonder, but exploding power supplies have been known to do damage before. And with a thirty degree temp rating, I can’t tell you I’m not nervous.

EVGA 450BV 450W – STANDBY Load Tests
Test # +5VSB DC Watts/
AC Watts
P.F. Eff.
1 0.5A 2.50W/
0.334 81.4%
2 1.5A 7.46W/
0.444 79.6%
3 3.0A 14.85W/
0.494 75.4%

We start with the standby tests, where the unit manages to do a better than average number across the board for efficiency. It’s also pulling down a very respectable 1% regulation number.

I like the way things are going already. It’s already doing better than I expected. Let’s see how it handles the full series of cold tests. Make no mistake, these will already be pushing that thirty degree spec.

EVGA 450BV 450W – Cold Load Tests
Test # +3.3V +5V +12V DC Watts/
AC Watts
Eff. P.F. Intake/
Progressive Load Tests
1 1A 1A 3A 46.4W/
118.1V 80.2% 0.971 26°C/
3.354V 5.09V 12.22V
2 1.5A 1.5A 6.5A 94.3W/
118.3V 84.7% 0.982 26°C/
3.343V 5.09V 12.18V
3 3A 3A 16A 226.2W/
118.2V 85.8% 0.989 26°C/
3.313V 5.09V 12.10V
4 4.5A 4.5A 24A 336.0W/
117.5V 84.4% 0.989 26°C/
3.287V 5.09V 12.02V
5 6A 6A 32A 447.3W/
117.3V 82.2% 0.990 26°C/
3.251V 5.09V 11.96V
Crossload Tests
CL1 14A 14A 0A 114.3W/
118.8V 78.1% 0.987 26°C/
3.259V 4.82V 12.25V
CL2 0.5A 0.5A 35A 416.5W/
118.0V 83.1% 0.990 26°C/
3.295V 5.38V 11.74V

So far, so good. We got Bronze numbers pretty cleanly from the efficiency column. Temperature at the intake didn’t go higher than twenty-six degrees, and the unit handled that fine.

Over on the voltage readings, we get 3.12% for the 3.3V rail, 0.00% from the 5V rail, and 2.17% for the 12V. A very good average of 1.76%. That 5V number may look impressive, but make no mistake about it… this is a group regulated unit. And on that subject, I need to tell you the design of this unit has its priorities wrong. See that 5V reading in CL2? That is out of spec, yes, but there’s a bigger issue… CL2 is the scenario most likely to happen with a modern rig with a lot of 12V load. CL1, on the other hand, is sitting there with everything right in spec.

What does that tell me? It tells me that this unit is perfectly designed for old rigs that power the CPU from the 5V rail. The box did claim that the 3.3V rail was DC to DC converted, so it probably pulls its power off the 12V side of things insuring that no high combined 3.3V/5V load is going to throw this unit out of spec. Great news if your grandma isn’t willing to toss that old Pentium III and you need to buy it a new power supply. Not so great news if you’re running any modern 12V based rig with this. Then, you have to watch your crossloads lest this unit go out of spec on you. Heck, I tried to unload the 3.3V and 5V completely in test CL2, and this thing just wasn’t having that. It shut right down, and would not come up again until I loaded those two rails. Given the voltage readings, I would say I hit the overvolt protection on that one.

Now, before we move on… if you do have the intent to use this with an old 5V based rig, make sure you don’t work it too hard. The combined rating on the minor rails on this unit is only 120 watts. That’ll do for most of those old computers, but don’t throw a lot of hard drives at it. You wouldn’t want to do that anyway with 20 gauge wire on those connectors.

Let’s go see how this unit handles power on spikes.