How often to replace a PSU?

I've got an old PCP&C Silencer 750 Quad that's over two years old, beat upon, yet runs fine. I suspect I'm near max output when I hammer it, and the http://extreme.outervision.com/psucalculatorlite.jsp has me worried about age.

Should I start to think about a fresh replacement, or wait for something to break?
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  1. You say it's been beat upon, and near max power, clarify by posting your specs.
  2. Replacing a PSU is about every 5 years(If you got like a high-end system that has a good PSU like Corsair HX series, it'll last long for about probably 5-10 years)... If you got cheap PSU like 700Watts for $50, you'll need to replace it once every 2 years buy depends how much system used the PSU... More Watts usage for cheap PSU means it'll die faster...
  3. replace it when you either are going to exceed the psu's stats or when your power supply dies.
    I have a feeling you are no where near maxing it out, but you must list your system specs for us to be sure on an answer.
  4. hmp_goose said:
    I've got an old PCP&C Silencer 750 Quad that's over two years old, beat upon, yet runs fine. I suspect I'm near max output when I hammer it, and the http://extreme.outervision.com/psucalculatorlite.jsp has me worried about age.

    Should I start to think about a fresh replacement, or wait for something to break?


    You have one of the best quality psu's made. I think I came with a 5 year warranty. Unless you are looking at sli GTX580's, I can't see you pushing it past it's max, perhaps not even then. I would not replace it unless it no longer is strong enough. If it should fail, contact PC P&C for a repair. For what it is worth, they have a very good customer service department.. You actually get to a live person fast.
  5. Right:
    i7-920 with the QPI turned up
    Gigabyte EX58-UD5
    Noctua NH-U12P SE1366, pointing up to take advantage of the big side intake of the
    Cooler Master HAF932, with all it's fans and a Noctua NF-P12 thrown in for good measure
    12GB of G.Skill, 7-7-7-21, with this Antec Cool Spot "just in case"
    Crucial M225 64GB SSD
    Stereo VelociRaptor 300GBs in a RAID 0 off the motherboard
    WD Caviar Black 1.5TB
    Creative SoundBlaster X-Fi Elite Pro, the kind with the big breakout box and a floppy(!) power patch on the card
    EVGA GTX580SC driving the CRT
    MSI N450GTS feeding twin Samsung F2380s
    Razor Black Widow Ultimate and Mamba (they both light up, see …)
    Zip 250 (old die habit hards)

    All the cards are bunched together, as I can't get a video card to run in the last MB slot. And since that last wave of drivers seems to keep all the clocks on the video cards up, I think I come close to the "90% usage", as before the MSI never really was asked to do anything while the EVGA was under load.
  6. Under max load the GTX 580 uses about 240W or ~20 amps. and the MSIN450GTS consumes about 116W or ~10 amps. on the 12v rail. Figuring a nominal 10 amps. for the CPU and another 8 amps. to power the other 12v consumers you're at about 48 amps. max 12v draw at max load.

    The PCPC 750 Quad has 60 amps. available on the 12v rail so you have plenty of reserve capacity. I have run PCPC PSUs for over ten years without failure so I think you should run it until you need more power as they are fine quality construction PSUs. PCPC and some other PSUs are not as likely to see a drop in performance over time due to use of better components than cheaper PSUs use.

    http://www.techpowerup.com/reviews/MSI/GeForce_GTS_450_Cyclone_OC/26.html

    http://www.guru3d.com/article/geforce-gtx-560-ti-sli-review/14

    http://www.pcpower.com/downloads/750_Quad_new_5YR_lr_3827.pdf
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