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What PSU for a P4 in a Mini-ITX factor system?

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  • What PSU for a P4 in a Mini-ITX factor system?

    Hi all,

    My current Via MiniITX just doesn't cut it anymore, so I've located a P4 Mini ITX factor case - but am unsure about power consumption, so I don't know what kind of PSU to look at.

    This will have to run off car voltage (obviously), and be able to run a 2.4Ghz+ Celeron or P4 CPU + 1HDD.

    What have people used for P4 systems off 12v?

  • #2
    I have an EPIA P4-ITX w/ Celeron 2.4Ghz processor. I've had no problems with my Arise MPD-810 PSU. If you can keep it cool, it can put out around 120W of power. I like it because it is cheap ($79), it has good input voltage range (10V-30V), and has lots of juice on the 5V rail (14 amps) so I can power all my USB devices (I have 6 devices) and my 2.5" HDD without a problem.

    But, just to warn you, 10V is cutting it very close to the crank voltage, and many people have had problems surviving crank with this PSU. Luckily, my battery puts out more than 10V during crank, so I've had no problems.

    Also, I haven't tried with a P4, but I'm sure that if you get a Northwood based one, power won't be an issue.
    1994 RX-7, EPIA P4-ITX w/ Celeron 2.4 Ghz, Arise PSU, Xenarc 700TSV (new model)

    Comment


    • #3
      Originally posted by NoPistonPC
      I have an EPIA P4-ITX w/ Celeron 2.4Ghz processor. I've had no problems with my Arise MPD-810 PSU. If you can keep it cool, it can put out around 120W of power. I like it because it is cheap ($79), it has good input voltage range (10V-30V), and has lots of juice on the 5V rail (14 amps) so I can power all my USB devices (I have 6 devices) and my 2.5" HDD without a problem.
      Hmmmm - interesting.. the 150W Opus PSU I got quoted on was $200US + $40US shipping. imho, unless I can get one cheaper, then it's not worth paying $350-400AU for a 150W power supply that I could make myself cheaper.

      But, just to warn you, 10V is cutting it very close to the crank voltage, and many people have had problems surviving crank with this PSU. Luckily, my battery puts out more than 10V during crank, so I've had no problems.
      This doesn't worry me - I have a dual battery system which disconnects from the main electrical system on cranking.

      Also, I haven't tried with a P4, but I'm sure that if you get a Northwood based one, power won't be an issue.
      Hmmmm - celeron would probably be ok... the GPS software works *way* too slow on a 533Mhz CPU - so 2.4Ghz Celeron should be fine...

      Comment


      • #4
        oh, and btw - what kind of wattage does your system draw?

        Comment


        • #5
          I haven't measured current draw so I couldn't tell you the exact wattage. But, here is what I have on each rail:

          +12V: Celeron 2.4Ghz, CPU Fan (Intel), PSU Fan, SR-8187 slot-load DVD drive
          +5V: 2.5" HDD, 4-port USB hub, Audigy 2 NX USB, D-Link USB FM Radio, GPS receiver, XMPCR
          1994 RX-7, EPIA P4-ITX w/ Celeron 2.4 Ghz, Arise PSU, Xenarc 700TSV (new model)

          Comment


          • #6
            Originally posted by NoPistonPC
            I have an EPIA P4-ITX w/ Celeron 2.4Ghz processor. I've had no problems with my Arise MPD-810 PSU. If you can keep it cool, it can put out around 120W of power. I like it because it is cheap ($79), it has good input voltage range (10V-30V), and has lots of juice on the 5V rail (14 amps) so I can power all my USB devices (I have 6 devices) and my 2.5" HDD without a problem.

            But, just to warn you, 10V is cutting it very close to the crank voltage, and many people have had problems surviving crank with this PSU. Luckily, my battery puts out more than 10V during crank, so I've had no problems.

            Also, I haven't tried with a P4, but I'm sure that if you get a Northwood based one, power won't be an issue.
            HI, bought the same powersupply, it cost me almost 120 with the cable harnmess. It works well, when you figure out where all "extra" connectors ar supposed to be connected. I thought it could be a little smaller. But quality is really top notch. It gets really hot though, so I added cooling to it.
            How do you get around the cooling issues, the manual says 80W w/o cooling, 120 watts with cooling. It got it from www.bicker.de.


            o/______\o
            (oo_OO_oo)
            []o-----------o[]
            '94 320i

            Comment


            • #7
              I just took an old case fan from one of my other machines (they are like $5 new) and plugged it into one of the molex connectors coming out of the PSU. The fan had a built in molex splitter so it didn't use up any of the connectors. So basically, the PSU powers its own cooling system.

              It doesn't take much to cool down that PSU since the PSU case is a massive heatsink that cools down quickly with even the smallest breeze.
              1994 RX-7, EPIA P4-ITX w/ Celeron 2.4 Ghz, Arise PSU, Xenarc 700TSV (new model)

              Comment


              • #8
                Do you have a P4 setup? Do you have 3.5in HD and a full size DVD-Rom? I was wondering if it had enough juice to support a full size system.

                o/______\o
                (oo_OO_oo)
                []o-----------o[]
                '94 320i

                Comment


                • #9
                  http://www.cartft.com/shop/catalog/il/407

                  ...i'm surprised no one posted that one

                  Comment


                  • #10
                    Originally posted by niral622
                    http://www.cartft.com/shop/catalog/il/407

                    ...i'm surprised no one posted that one
                    I have to say, GOD DAMN!... But for the benefit of people on the other side of the planet, what the hell is a Euro worth?

                    I wonder if there are any places that have these and take $AUD...

                    Comment


                    • #11
                      Originally posted by euro320i
                      HI, bought the same powersupply, it cost me almost 120 with the cable harnmess. It works well, when you figure out where all "extra" connectors ar supposed to be connected. I thought it could be a little smaller. But quality is really top notch. It gets really hot though, so I added cooling to it.
                      How do you get around the cooling issues, the manual says 80W w/o cooling, 120 watts with cooling. It got it from www.bicker.de.

                      Hmmm - so does this come with a whatever -> ATX connector? or is it a case of rat one from a dead PSU and connect as needed?

                      Comment


                      • #12
                        1 euro=~1US dollar
                        '96 Chevy Cavalier - EPIA M10000, Win2K,MediaCar, Deluo GPS Mouse with Routis, 60GB external HD, 7" widescreen monitor from DigitalWW.

                        '00 Jeep Wrangler - planning stage


                        What can BROWN do for you?

                        Comment


                        • #13
                          Originally posted by CRCinAU
                          Hmmm - so does this come with a whatever -> ATX connector? or is it a case of rat one from a dead PSU and connect as needed?
                          When I bought it I had to specify that I wanted the ATX cable hydra with it. It has a couple connectors that need to feeback to the DC-DC converter.
                          On the PC side, it looks your average connectors, ATX, drives and even a P$ connector. And it works great! It doesn't survive a crank tho, I usually set the 'puter in STR3 and then start the car. This brings me back to where I was in seconds -usually about 4seconds. The STR3 mode only keeps 5V to the RAM at milliamps. I had my car on STR3 mode for a week and even forgot it was on standby. No probs whatsoever.

                          o/______\o
                          (oo_OO_oo)
                          []o-----------o[]
                          '94 320i

                          Comment


                          • #14
                            BTW at today's rate, 1USD is about 0.81 .

                            o/______\o
                            (oo_OO_oo)
                            []o-----------o[]
                            '94 320i

                            Comment


                            • #15
                              They have a pulldown menu on the left hand side of the site that allows you to choose from a few forms of currency.
                              mATX mobo
                              2.4 GHz Celeron (prescott)
                              512 MB RAM
                              80 GB 3.5" HD
                              Runnin off an inverter (for now)
                              7" Lilliput
                              Microsoft (Pharos) USB GPS
                              Have yet to pull the trigger on a slim slot load DVD
                              STATUS: who knows... I don't

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