Reviews - Rosewill RP500-2 500W
Sample Provided by: Rosewill (By madmat on Sat, Jan-13-2007)

Page 1 -

Rosewill...the word will make the skin crawl, gooseflesh erupt and cause other signs of revulsion in the PSU knowledgeable but are they all really that bad? What if I said no? Would I be a heretic? Would I be marginally insane? Would I be correct? The answer is yes, yes and you'll have to read on to find out.

The box is very plain for the RP500-2 there's a wattage breakdown on the back and a picture of the unit on the flap along with a list of features. No fancy graphics, double talk or advertising hoopla. Pretty refreshing if you ask me.

Inside the box is the power supply and a cord. That's it as far as I can recall. I've looked all over for a manual but if it had one I either ate it or it got lost in the shuffle. Either way, if you're buying a PSU and don't know how to install one you should leave it to a pro and not attempt it. It would be nice to know a bit about the unit but it's not a live or die thing.

Out of the box we can see that the aesthetic is a mixed bag. The unit has a very swank mirror finish but the only sleeved cable is the main ATX cable. The rest are left bare. Yes, I realize this is a sub-$50 power supply but I'd be willing to pay a few bucks more for a more finished look as I'm sure most would. The exhaust end is punched with a fairly free flowing honeycomb pattern. Pretty standard fare but nice to have nonetheless. We also see that this PSU in non PFC as evidenced by the voltage switch. Next to the voltage selector switch is the fan speed selector switch. This varies the voltage to the blue LED fan to a degree. The Bottom selection (L) and the middle selection (A) were pretty much exactly the same as far as I could tell. The fan responded the same as far as apparent airflow and brightness of the LED's. The top selection (H) turns the fan all the way up but as the heat gets poured on by higher wattages it's the same as the other two settings in that switching between them gives no change whatsoever in the airflow. I noticed this as the PSU was pushed past about 300W.


A quick look at the label reveals the amperages for the rails. It also tells us that the unit is built by ATNG.

Rosewill RP500-2 +3.3V +5V +12V1 +12V2 -12V -5V +5VSB
30A 45A 18A 15A 1.0A N/A 2.5A
Max Combined Watts 275W 380W 12W N/A 12.5W
475.5W 24.5W

The overall rating isn't terribly bad for a 500W PSU but does it hold up under pressure? We'll find out, be patient. Looking at the rail specs it looks like it'd be ok for an older PC that doesn't have the ATX 12V plug but with the dual 12V rails I think I'd advise against it. I didn't test for cross loading but most modern power supplies tend to dislike it. Out of curiosity I did a bit of experimentation and found that the 12V rails are limited to 24A before kicking in OCP. This means that should you push the 12V1 rail past the 18A limit the PSU will give you some headroom, a good thing if you've got a bunch of drives spinning up on boot.

Type of connector: Rosewill RP500-2
ATX connector 20+4 pin
2 x 2 12V connectors 1
2 x 3 PCIe 1
8-pin Xeon/EPS connector 1
6-pin Xeon/AUX connector 0
5.25" Drive connectors 8
3.5" Drive connectors 2
SATA Drive power connectors 2
Fan only connectors (thermostatically controlled 12V only) 0

I'm slightly disappointed by the connector compliment. I'd like to see more SATA connectors and fewer molex connectors. As to only having the one PCI-e connector, that's not that big of a deal. With just 18A on the rail powering all the 12V accessories I think that you don't need to be trying SLI with anything above a pair of 7600GT's anyways, better safe than sorry in my book. Interestingly enough the RP500-2 gives you both an 4X2 EPS connector along with the 2X2 ATX 12V connector which means this unit is compatible with some dual CPU boards that require both the ATX 12V plug and the EPS plug be connected to power the processors. Happily the cables are long enough to allow use in just about any case config you care to use it in. As you'll see in a bit, this could be a boon for longevity of this PSU, using it in an inverted, partitioned case can be a benefit for this PSU.

Now that we've seen the outside and looked at the MFG ratings let's take a look at what this baby is capable of....


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