Cooler Master UCP 900W
by Christoph Katzer on July 29, 2008 3:00 AM EST- Posted in
- Cases/Cooling/PSUs
Cables and Connectors
The large mass of cables is nicely bundled up during shipping, and all are sleeved with a black mesh, including sleeving in between connectors. This can increase the cost slightly, but for those who are fanatical about having clean wiring it's a nice extra. There are a total of four 6-pin and two 8-pin PEG connectors for graphics cards on four separate cables; two of the cables have a 6-pin and 8-pin connector while the other two each have a 6-pin connector. Some users might have difficulties with using the 8-pin connectors on certain 6-pin graphics cards, but with many of the newest GPUs requiring an 8-pin and a 6-pin connector there shouldn't be any serious problems; after all, it's unlikely people running old hardware are going to go out and buy a power supplies like this.
There are a fair number of peripheral connections available on several harnesses, but the overall harness length may not be long enough for a larger chassis, as the longest harness is only 75cm. Again with the 900W rating, it seems a lot of users would be likely to have a larger case that provides for better cooling opportunities, so that's something potential buyers will want to consider. The ATX cables are 60cm and 65cm long, which should work well whether your power supply is in the traditional location or at the bottom of your chassis (like in Cooler Master's own Cosmos case). However, there are still cases where you may require longer cables, so pay attention to that area before purchasing this power supply for use in your favorite chassis.
The Fan
The Cheng Home Electronic fan branded SuperRed can be found in many of the Acbel-made power supplies from Cooler Master. It spins at up to 2000RPM, which we will see later in our tests. For a 120mm fan, that should be more than enough to cool the 900W PSU, but at maximum speed the fan does get moderately noisy.
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MrOblivious - Tuesday, July 29, 2008 - link
Sorry meant to say seems to be indicated in the article in my last line.Adamantine - Tuesday, July 29, 2008 - link
There are four 12v rails, yet you only show regulation on a single rail, not even labeled at that... where are the voltage regulation line graphs for the other 3 rails, if there are in fact 4 rails?jonnyGURU - Tuesday, July 29, 2008 - link
+12V rails are rarely independent. Usually "multiple" +12V rails is just a +12V rail split up into four, six, etc. with an over current protection circuit in place for each. If there's any "regulation" difference between one +12V rail and another, it's usually caused by resistance between the +12V source and the end of the connector and NOT actual poor voltage regulation. So the best course of action would actually be to average out the results or combine +12V rails into one.More on "multiple" +12V rails: http://forums.anandtech.com/messageview.aspx?catid...">http://forums.anandtech.com/messageview.aspx?catid...
Christoph Katzer - Tuesday, July 29, 2008 - link
ehm we combined them into one graph, that's why they are so thick ;) The graph shows in which area all of the rails have been regulated. We had shown differently before but with six rails for example you cant see anything anymore...SilthDraeth - Tuesday, July 29, 2008 - link
I read the review and I saw you nitpick about a few things, but I didn't read about any real problem.JarredWalton - Tuesday, July 29, 2008 - link
The 12V rail problem is that 12V1 (rated at 25A) supplies the power for the 24-pin connector, the 4-pin ATX12V connector, and all the SATA and Molex connectors. Meanwhile, 12V2 *only* powers the EPS12V connector (which quite a few people won't even use!), and 12V3 and 12V4 are dedicated to the PEG connectors.Basically, there's a lot of stuff coming off of the main 12V rail, and thus it's going to be virtually impossible to come anywhere near the rated output unless you happen to have an EPS12V connector on your motherboard. More important is that with the right combination of hardware (i.e. quad-core overclocked CPU, a high-end GPU, and several HDDs) you could easily overload 12V1.
strikeback03 - Wednesday, July 30, 2008 - link
The EPS12V is the 8-pin CPU connector, correct? The same one that seems to be far more common these days on the class of motherboards likely to be used with a 900W PSU than the 4-pin connector?JarredWalton - Wednesday, July 30, 2008 - link
I don't know that I would call EPS12V "common". It's used on some high-end mobos, but not on others. It was initially more of a workstation/server connector. Some PSUs have a 4/8-pin cable that works with either ATX12V or EPS12V, but it seems Cooler Master decided to go with a dedicated ATX12V and a dedicated EPS12V. It would have made a lot more sense IMO if they had all of the peripherals on the same rail as the EPS12V (and ATX12V for that matter).Bozo Galora - Tuesday, July 29, 2008 - link
Weren't you going to add ripple and noise tests?Or do I have the wrong recollection?
These guys say it had 78mv on 12V line
http://www.techpowerup.com/reviews/CoolerMaster/UC...">http://www.techpowerup.com/reviews/CoolerMaster/UC...
Amart - Tuesday, July 29, 2008 - link
Anandtech are not interested in presenting a complete professional review of PSU's, instead they have stated we should "trust them" on ripple and noise questions.I think that Anandtech PSU reviews should look at JonnyGuru.com and HardOcp.com and take notes on how to do things right.