Need help about DC-DC Power Supply

[zahin]

My config:

CPU: Intel G3220

Mobo: Asus H81M-E

RAM: 2x Transcend 4GB DDR3 1333MHz

HDD: 2x 1TB 7200rpm WD Blue

SSD: 1x  SATA 240GB Transcend

 

Right now, I'm using a non-brand 500W PSU

 

Other devices I use regularly:

1. Dell Keyboard

2. G402 Mouse - Lights are always off/ lowest brightness

3. USB Bluetooth adapter

4. USB WiFi adapter

5. 3.5mm Micophone

6. 3.5mm Headphones

 

My PC is powered on or on hybrid sleep most of the time.

 

I ran the numbers on power supply calculator and the result was 203 watts, recommended: 253 watts (screenshot in attachment)

 

Now my questions are:

1. What wattage DC-DC PSU should I get?

2. The 250W PSU's I found had only one SATA power with a 4-pin molex and a 4-pin floppy power. How would I go about powering my three (sometimes four) drives?

3. Where could I find a suitable power adapter?

 

Adapters I found:

1. RGeek 300W - Aliexpress

2. Ninth world 250W - Aliexpress

[orbitalbuzzsaw]

Get a cheap 500B from EVGA to have some room for upgrades

[MrDrWho13]

Why do you want a DC-DC Supply?

[zahin]

15 minutes ago, MrDrWho13 said:

Why do you want a DC-DC Supply?

Cause I'm bored

[MrDrWho13]

3 minutes ago, zahin said:

Cause I'm bored

What are you planning to use as the input?

[zahin]

51 minutes ago, MrDrWho13 said:

What are you planning to use as the input?

That's actually my question no. 3 lol

I'm looking for adapters from friends and on aliexpress.

If that fails, I'll mod my current psu to output 12v.

You might ask what's the point. The point is to experiment and have fun

Also, if you know any place where I could find affordable laptop power adapters, please let me know.

[awesomegamer919]

1 hour ago, orbitalbuzzsaw said:

Get a cheap 500B from EVGA to have some room for upgrades

500B has a (potentially) fake rating and uses group regulation, not DC-DC, so I would avoid it, a CX450/m, BeQuiet Pure Power 10 400/500w or Coolermaster Masterwatt 450w would be far better...

[awesomegamer919]

1 hour ago, zahin said:

Cause I'm bored

You do know that most modern PCs have DC-DC converters inside them? They regulate the voltage to +12V then use MOSFETs to regulate down to 3.3/5V

[zahin]

8 minutes ago, awesomegamer919 said:

You do know that most modern PCs have DC-DC converters inside them? They regulate the voltage to +12V then use MOSFETs to regulate down to 3.3/5V

Ok now it feels like I didin't explain my question correctly. ?

Sorry about that.

I was talking about PSU's like pico-psu and HDPLEX.

pico-psu

HDPLEX:

Off brand:

  

These PSU's take a DC input (for example from a laptop power brick) then give you 24-pin ATX and other necessary connectors for you your motherboard.

Hope it clears the confusion up. Or correct me if I'm misinterpreting your post. (I have trouble with English sometimes ?)