Welcome to G2G,
Use the eXtreme PSU Calculator Lite
to determine your power supply unit (PSU) requirements. Plug in all the hardware you think you might have in 2 or 3 years (extra drives, bigger or 2nd video card, more RAM, etc.). Be sure to read and heed the notes at the bottom of the page. I recommend setting Capacitor Aging to 30%, and if you participate in distributive computing projects (e.g. BOINC or [email protected]
), I recommend setting TDP to 100%. Research your video card and pay particular attention to the power supply requirements for your card listed on your video card maker's website. If not listed, check a comparable card (same graphics engine and RAM) from a different maker. The key specifications, in order of importance are:
1. Current (amperage or amps) on the +12V rail,
3. Total wattage.
Then look for power supply brands listed under the "Good" column of PC Mechanic's PSU
Reference List. Ensure the supplied amperage on the +12V rails of your chosen PSU meets the requirements of your video card. Don't try to save a few dollars by getting a cheap supply. Digital electronics, including CPUs, RAM, and today's advanced graphics cards, need clean, stable power. A good, well chosen supply will provide years of service and upgrade wiggle room. I strongly recommend you pick a supply with an efficiency rating equal to, or greater than 80%. Look for the 80 Plus - EnergyStar Compliant label
. And don't forget to budget for a good UPS with AVR (automatic voltage regulation).(Credit to Digerati for this speech)
This will help you determine what you need...Here
is a link the specs of your friends current PSU
I would think most likely the PSU should work fine since it is an older computer, and you are replacing and not adding another HDD... and the RAM increase will only require slightly a bit more power... But try the calculator...
Edited by cbarnard, 06 June 2009 - 10:33 PM.