Question 1

Is there any way to force off all the cosmetic LEDs other than physically disconnecting them from their power source?

Accepted Answer

No the unit contains no switches nor software to allow that which is actually odd, but normally the case with lighted PSUs and fans - to save money I guess? So yes you would physically have to break or disconnect the LEDs to "shut" them "off". I should point out the obvious here, the lights are why you would get this unit over another PSU - they look great in a case with a window. It's the first thing people who see my build comment on as they are at just the right brightness and on a bottom mounted build like mine it looks great IMO. If you do not want the lights there are several other PSUs in this power and price range to choose from and Rosewill is neither more or less rated differently than most of those.

Question 2

I am considering purchasing this PSU, but after reading the reviews I have some concerns about the cable length. My case is a full tower (Coolmaster HAF X). Will I have any issues with wiring?

Accepted Answer

As far as i can tell you shouldnt worry the shortest lengths for these are about a foot and a half and keep in mind that desingners of such high end psu have to think of multi desktop compatiability weather its micro,mid tower , or full tower plus there is also a newegg 30 day return poolicy on most items some longer some shorter check out the retern policy to just in case. Hope this helps i know for me personally this psu is very good and stable as far as current flow goes. Its also rated 80plus gold which means it can provied clean power meaning no loss of voltages 80% or higher of the time, thats great.

Question 3

is 1300 w power supply to much for a gaming rig ?

Accepted Answer

Yes, however figure out how much wattage your gaming system is going to draw from the socket then estimate the PSU you will need.
For example if you have a cpu drawing 125W and a motherboard + components drawing 50W + 2 gfx card drawing 250W each under load (total 675W) then a 850 W bronze, gold, platinum PSU is enough. If you choose 1300 W PSU you waste efficiency and also a higher wattage PSU is priced higher than one which fits nicely.
Check out "Johnnyguru" and look at which load the PSU of your choice has the highest efficency. Usually the best is if you load you PSU at around 70% therefore a 850-1000W PSU would be the best choice for my example. Unless you run 4 GFX cards you wont need 1300W PSU.

Question 4

I plugged it in and turned it on and nothing happened. The fan didn't start up. I checked the electrical socket and it is fine. Did I get a bad one right out of the box?

Accepted Answer

The power supply will not run unless it believes it is plugged into a motherboard. You can " trick" the psu by inserting a paper clip in the green socket and inserting the other end in a black socket

Question 5

What are the amps on the 12 volt rail? Need at least 42.

Accepted Answer

This PSU is a signle +12V rail with 108 amps on it. It is way more than you need if you only need 42 amps. It is a great PSU however.

Question 6

How do you switch input voltage from 120 to 240? Usually there is a switch but on this PSU the red switch is for the color of the fan

Accepted Answer

The input voltage is auto-selected by the PSU itself, no external switch is necessary.

Question 7

is this compatible with ASUS Rampage IV Black Edition LGA 2011 Intel X79 SATA 6Gb/s USB 3.0 Extended ATX Intel Motherboard?

Accepted Answer

Yes, it most certainly is. I'm using it with a different LGA 2011 MB and dual 280x's, and it supported significant stable over-clocks at one point.

Question 8

Is this power supply compatible with the ASUS Crosshair V Formula-Z MOBO?

Accepted Answer

Yes. The ASUS Crosshair V Formula Z uses just a standard 24-pin power connection. As the Rosewill Lightning-1300 has a 20+4 power connection, there is no reason why this PSU would not work.

Question 9

Is it possible to have the lights be on without having cables plugged in? I really like the lights, but need all the cables.

Accepted Answer

I am not aware of a way to lite the cable socket without having a cable plugged in to it

Question 10

Are the cables in this the same as those for the Kingwin Mach 1 series? The whole thing looks very much like those PSUs...

Accepted Answer

Yes, they are exactly the same, they screw in just like the cables on the Kingwin Mach 1.

Questions & Answers