Comment Thread for Cooler Master Real Power Pro 750W Review

[SKYMTL]

The review is up, the power supply is a good 'un but there are a few small points keeping it from being a PERFECT power supply.

Read more here: Cooler Master Real Power Pro 750W Power Supply Review

Please use this thread to post your questions and comments.

[magictorch]

What a great performer for the price.

Was thinking of PC power and cooling 750watt but its $50 more (not seen it on sale yet). This is a good option.

Solid review as always and Im glad you go the extra mile with re-testing. It helps to give this site the edge over other forums.

Certainly Ive yet to come across a forum thats provides such a well rounded environment for the noob (like me) to the hardcore.

[Thund3rball]

Wow I am impressed. If I was in need of that much power I would really consider this unit. Bang for buck this is a serious contender! An absolute top notch review as always SKY.

I have read that multiple 12V rails is something to stay away from these days and having just one is better. I know you are the man to ask about this stuff so any comment on this, considering this unit has 4 12V rails? Thanks :)

[Shadowmeph]

Great review and just in time for me because I am looking for a PSU to fit in my Aurora 570 case and this one is at my price range now the question is where is it you can buy it for this Price: $130CAD because I went to my usual sites (http://www.ncix.com/products/index.p...ooler%20Master, and at directcanada site the closest psu they have is this one Coolermaster Real Power 750W ATX 12V V2.2 SLI Active PFC 80PLUS Power Supply 120MM Fan - DirectCanada. but that isn't the same psu :(

[SKYMTL]

Here you go for where I got my prices:

PriceCanada.com: Cooler Master - Cooler Master Real Power Pro 750Watt nVIDIA SLI Ultra-silent...

NCIX and DC along with their affiliates seem to not have a good selection of CM PSUs.

FYI, I ALWAYS research prices in Canada before posting prices. ;) But ignore the MIRs since I have had quite a few problems with CM MIRs.

Also, this PSU will be going to go up for sale in the Charity thread tonight.

[magictorch]

For sale tonight?....thats interesting

[SKYMTL]

Originally Posted by Thund3rball

I have read that multiple 12V rails is something to stay away from these days and having just one is better. I know you are the man to ask about this stuff so any comment on this, considering this unit has 4 12V rails? Thanks :)

This is a bit of a tough one since there IS no right answer. For 99% of the computer systems out there, the number of rails really doesn't matter. On the other hand things start getting a bit more complicated when you start looking at power users and overclockers.

Let's break this down a bit.

Multiple +12V rails

Multiple +12V rails will not really affect you unless you are pushing your power supply harder than it should be pushed. Take this CM 750W that I reviewed. It has 4 19A +12V rails which means that you can put a 228W (19A X 12V) load on any ONE of those rails. Since the CPU connector is on its own dedicated rail your CPU can draw up to 228W before tripping the OCP...and this is basically as much as a QX6800 overclocked to 5Ghz+ (this is an estimate) would draw.

The same goes for the PCI-E connectors. Since the GPU has been the heaviest loader of power supplies for the last few years, this area is a bit of a slippery slope so you will have to bear with me.

One of the main dangers of a multi-rail unit is bumping into the OCP circuit (it is set at 19A on this PSU) on any particular rail. This is why you have to pay VERY close attention to which rails power which component. In most good 4 +12V rail PSUs, the PCI-E connectors are broken into their own rails or if there are 4 PCI-E connectors, there are two on each rail. This is a good thing since each pair of PCI-E connectors will have access to 19A before the OCP trips.

Some other PSUs group the second PCI-E connector with the Molex or SATA connectors on the same rail. This is OK as well but you will have to start paying attention to what you attach to each rail. BUT, see below....

On the other hand it is VERY hard to trip an OCP of a good power supply even with heavy loads. Take the example of the Silverstone ST50EF in my review from ages past. Basically, the +12V2 rail is dedicated to the CPU while ALL other +12V outputs (PCI-E connectors, ATX connector, Molex Connectors and SATA connectors) is handled by the single +12V1 rail which is rated at 18A. Even with my setup in theat review (which included a pair of 8800GTS cards) I was still not able to trip the OCP.

Sure, if you are pushing for insane (5Ghz) overclocks on a 65nm Yorkfield you should not be looking at a multi-rail unit but for pretty much any application, multi rail is still perfectly good...no matter what PCP&C says.


Single Rail Units

Like I have already mentioned, these are good for any application but are not as necessary as some people would have you think. If you need an insane amount of power in one place then it is the way to go. On the other hand, with more and more CPUs and GPUs moving to smaller and more efficient manufacturing processes they may become a thing of the past.


Hope that answers your question.....

[Shadowmeph]

Originally Posted by SKYMTL

Here you go for where I got my prices:

PriceCanada.com: Cooler Master - Cooler Master Real Power Pro 750Watt nVIDIA SLI Ultra-silent...

NCIX and DC along with their affiliates seem to not have a good selection of CM PSUs.

FYI, I ALWAYS research prices in Canada before posting prices. ;) But ignore the MIRs since I have had quite a few problems with CM MIRs.

Also, this PSU will be going to go up for sale in the Charity thread tonight.

if it is then I want it lol
I never knew about that site I am bookmarking it lol

[Babrbarossa]

Wow- great value. Will we soon see a recommendations list for PSUs from you ;-)?

[Thund3rball]

Originally Posted by SKYMTL

Hope that answers your question.....

Totally thanks SKY! I knew you'd clear it up for me. So much misinformation out there especially on other forums and I needed a clear picture on this topic cuz my head wuz spinnin'.