Solved

Will swapping the BTX motherboard from an HP elite 8000 SFF to a dell optiplex 745 case give me more expansion room?

Ok guys heres the deal. Ive got an old hp8000 sff and after a whole day researching ive come to the result that hp sucks, btx boxes dont exist for custom use, and my old budget wasnt gonna cut it. SO, heres my question:
While digging i saw that a multitude of the dell optiplex 745 mid and full tower cases would support a btx motherboard. In theory, if i were to purchase one of these cases used, would it lead to more room for cooling fans and possibly an extra PSU? any expertise or advice from optiplex owners would be great!
7 answers Last reply Best Answer
More about swapping btx motherboard elite 8000 sff dell optiplex 745 case give expansion room
  1. The hardware and case on the Hp is proprietary.

    Can't be switched to the DELL...Sorry.
  2. It's more than just the size.

    The PSU connections are likely proprietary.
    The front panel connection to the motherboard are likely proprietary.
    Fan connections to that BTX board are likely lacking.


    Those old HP BTX things were never designed to be upgraded.
  3. USAFRet said:
    It's more than just the size.

    The PSU connections are likely proprietary.
    The front panel connection to the motherboard are likely proprietary.
    Fan connections to that BTX board are likely lacking.


    Those old HP BTX things were never designed to be upgraded.


    As a side not i do have a PSU bridge that would allow me to run the btx power supply with an aftermarket atx. Im just wondering if the motherboard would fit the case and line up with the rear i/o shield. as far as rigging fans and such i can get a secondary psu dedicated to the fans (and possibly a bigger graphics card) no problem
  4. Will that board fit in a different case? Unknown until you try it.

    And running 2 x PSU's is rarely better than a single one of required spec.

    What CPU is in this? Tossing more money into it may be a losing proposition.
  5. Best answer
    The Dell has the standard 24 pin ATX power + 4 pin CPU power, but its front panel is connected via an all in one header connector, inconveniently of lesser pin spacing than the typical 0.1"

    On the other hand, the HP Elite BTX boards have an unconventional power connection setup, but there are adapter cables to fit normal ATX power supplies.

    On the gripping hand, the Dell Optiplex GX mini tower power supply mounting screw pattern is standard ATX, so any normal power supply will fit.

    If you can figure out which pins do what on the Dell front panel connector you could cut and solder wires to adapt to any BTX board, or just hack in a normal momentary switch behind the Dell's case button.
  6. The Optiplex 745 has some potential in and of itself. It can support 8GB DDR2-800 (as fast as DDR3-1066). It can run older LGA775 quads including extremes. Popular chips are Q6700, QX6800,X6800 dual core (QX6850 might not work). The most popular GPU is the GTX750 single slot which doesn't require a new PSU purchase. Using Throttlestop software I overclcoked one to 3.45GHz. I do recommend heatsinking the MOSFETs because there are only 6 of them. Cooler # D9729 bolts right in. Get the latest BIOS available also. Aftermarket PSUs fit.
  7. I parted with all but one of my stack of Optiplex GX520 boxes yesterday. I kept one mostly because I happened to have a pair of 2 gig sticks that work in it. I may use it for a CNC computer.

    Upon closer looking at the case, it appears that the I/O shield area is not removable. You'd have to do some cutting to fit a standard size BTX shield in there, which is shorter in height and wider than the ATX size. But once you've done that mod, the rest of fitting some other BTX board into a Dell Matrix Smith case should be easier.

    A Zotac GTX 1050 Mini is a far better GPU than the old GTX 750. It uses less power (no PCIe extra power plug), it's shorter length, newer design, just better performing overall and it has hardware HEVC decoding and encoding. Its cooler is 2x thick but only uses one slot on the back. It's practically made just for BTX boxes with the x16 slot closest to the middle.
Ask a new question

Read More

Cases Optiplex Hewlett Packard Motherboards