HI I am replacing my psu and i was given a 550w PSU. would i be able to use this PSU to replace a 300w psu that has broken
More aboutreplace 300w 500w
If you give us more details like the motherboard model number and the psu specs we could give a more informed decision, but most likely yes you'll be fine, as long as its not a prebuild with non-standard wiring anywhere, dell amongst others swap wires around to ensure you use their replacements instead of upgrading yourself Moto
I'll have to second motopsych, moving up is much better than moving down. Might be time to shop around for some upgrades with all of this new found power.