Reviews - Rosewill Xtreme Series Power Supplies
Sample Provided by: Rosewill (By madmat on Thu, Aug-09-2007)

Page 4 -

Judging is done in four categories:  Performance, Functionality, Value and Aesthetics.  Each category has a different weight that accounts for a different percentage of the total score.  At the end, they are all added up to make the final score.  If the final score is 9 or higher, the power supply earns the jonnyGURU Recommended award.

RX850D-B

The Performance score is 40% of the total score...

Overall the performance of the RX850D-B is pretty good. the voltages stay well within spec and the ripple is never out of spec or even moderately noisy except during the high 3.3V/5V crossload test. During that test this PSU shows us that it's not by any means designed for use in older systems but in all reality you're not going to buy an 850W gaming PSU for an old system... are you? I'm handing the RX850-D-B an 8 here. Yes there's some room for improvement but it still really good especially for a budget unit.

The Functionality score is 20% of the total score...

The cables are nice and long (19" on the ATX cable, PCI-e cables and to the first connector on the SATA power. 17" to the first molex out to 32" on the last molex and 35" on the last SATA), sleeved and the the units aren't overly big at 7-5/8" for the D-B and 6-1/2" for the S-B. I am going to ding Rosewill for not including screws but that's it, not being modular won't count against them since it's largely a taste that you either have or don't have. That said I'm awarding a 9.5 for a well appointed unit with plenty of connectors for even the most drive happy individuals out there.

The Value score is 30% of the total score...

At the time of writing the RX850-S-B was going for $179.99 and the RX850-D-B was $10 more. This puts them at the bottom of their power class on Newegg price wise. Yes, I know there are cheaper places to buy the other brands but since most people try to buy from one place for simplicity this makes the Rosewill an attractive option. From a performance to dollars spent it's a good option at that so I'm giving the RX850-D-B a 9 since I can't justify the extra $10 for the dual 80mm fan option. Yes, we do see that the 80mm version is better at keeping it's cool but the cost of large fans runs more than smaller fans so there's no reason to jack the price by $10.

The Aesthetics score is 10% of the total score...

These babies are hot! I haven't seen PSU's that look better regardless of price. The finish and fit are simply great and the sleeving is fantastic. Toss in the LED fans and you've got a very, very nice combination worthy of a 10.

That total score for the RX850-S-B is 8.5.

Performance 8
Functionality 9.5
Value 9
Aesthetics 10
Total Score 8.5

The Good:

  • Plenty of power.
  • Stylish good looks.
  • factory sleeving.
  • Lowest price in it's wattage class (for the S-B variant).

The Bad:

  • Group regulation, not good for 5V based systems.
  • Gets noisy under low 12V high 3.3V/5V loads.
  • No 8 pin PCI-e

The Mediocre:

  • The regulation isn't as good as I'd like to see.
  • the D-B version is $10 more than the S-B
  • No screws? What?
RX750-S-B

The Performance score is 40% of the total score...

The RX750-S-B is pretty much a clone of the 850W but it does offer a bit better regulation and the ripple is a bit lower so it's getting an 8 too.

The Functionality score is 20% of the total score...

Since these are physically the same as the 850W units they'll be getting the same 9.5. They're really well thought out. three molex's per cable, three SATA per cable means that you can conceivably use two cables to plumb the entire case.

The Value score is 30% of the total score...

At the time of writing Newegg has raised the price of the RX750-S-B to $154.99. Still for what you're getting that's really a very good price so the RX750-S-B warrants a 10 here. The RX750-D-B is also $154.99 which means you don't pay a premium to get a better cooling PSU.

The Aesthetics score is 10% of the total score...

The RX750 line is just as beautiful as the RX 850 so it only makes sense to give it the same 10.

 

Performance 8
Functionality 9.5
Value 10
Aesthetics 10
Total Score 9

Because of the better value seen in the RX750-S-B, the total score on this unit is a "9" which earns it a jonnyGURU Recommended seal.

The Good:

  • Again, a wonder to behold, they don't get much better.
  • Lots of power on tap, this is how a 750W quad rail needs to be appointed.
  • Very well built
  • Excellent value for the money

The Bad:

  • Not a unit for 5V heavy systems.
  • No 8 pin PCI-e

The Mediocre:

  • No screws... that just baffles me.
  • The regulation still isn't as tight as I'd like to see but it's better.

Summary: I'm breaking the mold here and putting the summary last since I'm commenting on two units from two ranges. The RX850 is a very capable unit that's able to do justice to the highest end system that you'd care to throw at it. Just bear in mind that it is not meant for older 5V based systems, not by a longshot. For a house brand PSU it's really goodfar better than we see from other PC supply houses that go with units that tend to be under engineered. The group regulation is a bit disapointing and I hope that the future offerings will move to trur independent regulation but I must admit that for the use these units are designed for, 12V heavy gaming PC's, you'll never really notice that they are in fact group regulated.

The RX750 really shines since it's pretty much able to trade blow for blow with the 850W and for a typical enthusiast machine it's the better choice owing to it being nearly $30 cheaper. Would I use one in a heavily OC'ed quad core PC with dual 8800GTX's and a raid array? Oh yes I would, in a heartbeat.

I'm really surprised by the outcome from the different fan versions, I never would have believed that running a pair of 80mm's in a PSU could account for that much reduction in the temp delta between intake and exhaust temps but there it is in black and white (well black and blue/green) the 80's are really the best option for good cooling. I'd like to see Rosewill step up and start outfitting the RX series with a pair of convertible 8 pin PCI-e connectors since they're starting to come into demand (finally).

Overall these are quite satisfactory units that do everything they claim and do it pretty well for the most part. I personally have the least amount of hesitation in recommending them for anyone building a high end gaming machine.


 

JonnyGURU Feeds
Add our RSS feeds to your favorite RSS Reader or homepage.

JonnyGURU Reviews
AddThis Feed Button

JonnyGURU News
AddThis Feed Button

JonnyGURU Articles
AddThis Feed Button

JonnyGURU Forums
AddThis Feed Button

Follow us onFollow Us!
 
Site-Info | Affiliates | Contact Us | Site-Map
Copyright © 2012 - JonnyGURU.com