Question about Maxdata iStarUSA CP-01040 400W 1U Switching Power Supply 400-Watt

4 Answers

Can you replace a XPC Shuttle power supply with iStarUSA CP01040?

Can you advise me if I can up my power on my shuttle with iStarUSA CP01040 Power Supply ??????

I am trying to find out if PWR Supply has 20 pin and 4 pin power to motherboard and the outputs for 2 HD's and 1 DVD plus one for Video Card and an extra for a total of 5 or 6 4pinhardware plugs?

I need just a little more than the Shuttle PC50-PW 300W Power Supply Dimensions: 190 x 82 x 43 mm for XPC
and see this is the almost the same dimensions as the CP01035 of..
Dimensions (W x H x D): 100 x 40.5 x 200 mm
The Shuttle XPC PC50 PW is:
7.5 x 3.2 x 1.7 inches ; 1.3 poundsor

    • Mfr Part Number: PC50
    • Type: 300W SFF power supply
    • Input
      • Input Voltage: 90~264V AC
      • Input Current: 7A/3.5A (100/240V AC)
      • Frequency: 63Hz / 47HzEfficiency
      • Efficiency: >70% at full load
    • Output
      • Hold up time: >16ms at full load (@115V AC)
      • Rise Time: <20ms at full load, nominal line
      • Short circuit protection: latch off
      • Power good signal: TTL compatible
    • MTBF: >100,000 hours at 75% load, 25C
    • Noise: <30dB
    • Saftey: CUL, TUV, CB, CCC
    • EMI: FCC class B, CE, BSMI, CCC
    • Dimensions: 190 x 82 x 43 mm
    • With 2* Serial ATA Connectors
    • Active PFC
    • Smart Fan Temp-Speed Control

Posted by on

  • 123lsallis Nov 20, 2008

    I thank you UGE44 but I have the smaller profile profile box on my XPC. The 450W you suggest would be wonderful but I just got this info and you can see it is too wide as the PWR Supply sits along the side of the box and is only Dimensions: 190 x 82 x 43 mm for the org. Shuttle PWR Supply! Thanks for the try. Maybe I can find a pin out of the power 4pin plug for the CPU and cut and splice one off an old power supply if I can find an old one some where??? Guys I do appreciate every suggestion as I updated my video card and the 300W Shuttle is just a little short on power. If all fails I will move my DVD to an external powered box and if necessary the hard drive out too to a ESATA box and that will unload the PWR Supply and empty out the box but then I have to carry the tank/DVD-HD box with me so that is not too good just to get enough power for a hot video card to drive a nice 24" Samsung! Again thanks and I am open to more suggestions... I just cannot find anything the right size and the CP01045 and CP01040 are the only ones I can find of close size.
    Thanks again

    Shuttle 450W TOO BIG---Weight & dimensions

    Dimensions W x D x H
    86 x 150 x 83 mm

    86 mm

    150 mm

    83 mm

  • 123lsallis Nov 20, 2008

    Sincerely you made my day, thanks again so much!


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The 500w PC63 power supply is the best fit you will get...But it is .394 too wide in the direction of going out the side of the case. 1.692 (H) to 2.086 (H). The width of 3.228 (W) will take you to just over the top of your ram memory. The back side will have to be modified some also to accommodate that extra width. It will be longer inside the case, but there is room for the extra .400 in length. I saw a PC50 that was fit into a Shuttle SN95G5..So this info is based on that and from the standpoint of the PC50 dimensions.....As a solution, I'm sure you could bend the case with some handy work or just cut that section out on that side.

Posted on Mar 08, 2010

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I have the same problem, I have a Shuttle XPC SN45G, it has the stock 200W, power supply. I just bought a HIS HD 4650 1gb AGP. It requires a 400W power supply and I have been trying to find this for some time and cannot. 123lsallis did you use the iStarUSA CP01040 amd redo wire?

Posted on Nov 08, 2009

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The IstarUSA powersupply you specified has all the connectioons you desire except one. The 4pin 12V connector for the motherboard. Seeing as this is an important connection this PSU will NOT be suitable for your needs.

You might check into uge44's suggestion of the SilentX 450W

If this does not suit your needs, please comment back and we'll try to find you a suitable alternative


Posted on Nov 20, 2008

  • David Preston
    David Preston Nov 20, 2008

    The following link will take you to a page with graphics and charts depicting and defining then pin assignments for all of your standard power supply connectors, including the 12v connector you want to adapt.

    If you need further help please feel free to ask



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I did exactly the same for a build I did for someone, but I used the PSU that Shuttle suggested which of course is one of their own, but those boxes are so cramped that a centimeter out will ruin your day.
Depending on which model XPC you have I'd advise you to get a Shuttle SilentX 450W. If you click here you can see which models it fits and all of the techs and specs you need.
Best price I could find it for in the UK is here but also found one in Canada for just over £70. You can see that one by clicking here.

Posted on Nov 20, 2008

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What power supply connector will work with the ms8137c motherboard (aka, 20 + 4 pin)

Ahem, you just posted 20 + 4-pin.

That means it can be a 20-pin ATX main power cable, OR a 24-pin ATX main power cable.

Most power supply's now have a 20 + 4-pin power cable.

Use the 20-pin connector, or add the additional 4-pin connector, to make a 24-pin ATX main power cable.


In direct answer to your question, however, it uses a 20-pin ATX main power cable.

For additional questions post in a Comment.

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you can purchase a power supply from any computer store *********** board supports both standard IDE and Serial ATA connections, so you want a power supply that does SATA power as well. Unplug the power cord from the back of the computer. remove the cover from the case and verify that there is no green LED on the board that is lit up (if there is, there is still power on the board). unplug all connections from the current power supply, including all drive power and the large 24pin plug (actually a 4 pin plug that is combined with a 20 pin plug) on the board, then unplug the 4 pin plug near the processor. careful that the 24 pin plug and the additional 4 pin plug near the processor have latches on the side. Remove the 4 screws that hold the power supply in and remove the power supply, install new supply and reinstall the 4 screws. first plug in the 4 pin plug that connects with the 20 pin, the 4 pin plug has no latch, it is held in place by the 20 pin plug. then plug in the 20 pin plug and the 4 pin next to the processor. then plug in the drive power to all of the drives. Install the power plug at the back of the system and you should see a green LED on the board when you insert the power. replace the cover and power the system up.

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1 Answer

Emachine W2646--lights blinking on keyboard,pwr lamp on speaker on,power button on tower YELLOW,NO response! unplugged several hours,now dead,as if unplugged! This happened overnight while shut off...

If you have a Yellow light on power supply, chances are you have blown the power supply.
Even with a PC unplugged in a Bad Storm, I have seen many PC's and Laptops with Supplies shoot.
If you have a little computer savvy, the best thing to do is,
1. Disconnect power.
2. Open unit.
3. Disconnect all Devices from supply.
4. Disconnect 20 04 24 pin power supply connector to mother board.
5. If you have other connectors such as 4-pin 24 Volt acc. you can disconnect that as well.
6. Now plug in the supply. Note... Some supply's have a reset located in the rear of the supply, where it makes its input ( A/C connection. ) If so try the reset. Some supply's also light up or have a service light when sensing input power, some do not.
7. If all looks good and no sparks or flames, re-connect the mother board connection, (only)
Try to power on computer.
Note..... If you still have the Yellow light, Replace the supply.

In some cases, the power supply sees a fault and fold back to a protection mode.
The supply has several Capacitors in which hold a charge and when connected to the mother board retain that charge. Disconnecting the Mother Board 20- 24 pin connector will allow this charge to dissipate.
If all works after reconnecting supply, Your Good To Go.!!!
If not, you may need another Power supply.
Or may have done other damage.

Hope all works out for you.
Try it, it may work...
Readers, please rate your Technician
Thank you.
John Ray

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1 Answer

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