5v power from mobo/psu?

F5F Stay Refreshed Hardware Desktop 5v power from mobo/psu?

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elephantisland
Junior Member

12-22-2018, 12:39 AM

#11

The current draw of your AC/DC converter is 3.5 amps. Could that be the total consumption of the LEDs you're using? If yes, the original converter might draw less power.

elephantisland

12-22-2018, 12:39 AM #11

The current draw of your AC/DC converter is 3.5 amps. Could that be the total consumption of the LEDs you're using? If yes, the original converter might draw less power.

Waverabbit
Senior Member

643

12-27-2018, 11:44 PM

#12

that’s the reading from my lab bench power supply. it shows they’re drawing current. these are WS2812B LEDs, each powered by a 74LED/s meter, plus an extra 6W on the side, making around 110 LEDs total. calculating at 3.5x5 divided by 110 gives about 0.15 watts per LED—way below their claimed 0.25W per LED. still, they’re drawing roughly 2-2.5 amps in RGB mode.

Waverabbit

12-27-2018, 11:44 PM #12

MikeBenj
Member

209

12-27-2018, 11:50 PM

#13

One heckuva lotta LEDs. Oh well. That shoots down SATA. It’s got to be molex. I was looking at the RM 750 PSU pin outs via google images. There appear to be several versions of the model name. Apparently not all RM 750 PSUs are created equal.

MikeBenj

12-27-2018, 11:50 PM #13

MikeTheSuper
Junior Member

12-28-2018, 05:23 AM

#14

I received the Rm750x with an X variant. I'll check it later online if needed. I also have a fluke multimeter ready to verify. Thanks for your assistance, have a great day!

MikeTheSuper

12-28-2018, 05:23 AM #14

I received the Rm750x with an X variant. I'll check it later online if needed. I also have a fluke multimeter ready to verify. Thanks for your assistance, have a great day!

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