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I have a PC with Jetway 945GCM3 motherboard, Intel E4500 Processor, 3GB RAM and ATI HD4670 Graphics Card. The PSU suddenly started giving troubles and I decided to replace the PSU. The older PSU had a 20-pin + 4-pin auxiliary power connector on it. The new PSU I bought (Corsair VS450) only has 24-pin ATX connector.

I wasn't aware (didn't give much thought about) all these differences in pin before ordering the PSU. Only after unboxing and trying to connect it, did I come to know that the PSU doesn't have the 4-pin connector.

Now, since the 4-pin is just to provide auxiliary power, is it safe to ignore it and power on the system with just the 24-pin connected?

My system components:

  • Intel E4500
  • Jetway 945GCM3
  • 3GB DDR2 RAM (1GB + 2GB)
  • 500 GB 7200 RPM HDD
  • HIS HD4670 512 MB
  • (No floppy or DVD drives)

3 Answers 3

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A newer PSU will likely have a 6 or 8-pin instead of the old 4.
Sometimes they are splittable, like the 20/24 ATX connector, sometimes not

The first 4 pins will still fit an older motherboard... & will only fit one way.
Don't run it without the 6/8/4-pin in place.

According to the Corsair site, that PSU definitely has an EPS connector, though I can't find a pic that shows it

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    Thanks, how bad that I didn't realize the 8-pin connector is actually splittable (4+4)! Nov 1, 2014 at 5:17
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Your motherboard only requires two power connections, the 24-pin main power connector and a 4-pin 12V connector for the CPU:

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As long as you make both of these connections it will be safe to power on your computer.

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The 8-pin on the PSU splits into two 4-pin connectors. Simply take the 8-pin, split it in half and plug in the 4-pin that fits your motherboard.

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