Modding a Desk to build Dell Optiplex 745 (mini tower) inside

Adviceasker

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Jan 17, 2014
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So, I would like to start modding cases and systems and have liked the look of building a pc inside my desk for awhile. I have an old desk, as well as an old Dell Optiplex 745 (mini tower version). I figured it would be a good idea to try it with the Optiplex hardware so that if I inadvertently screw something up I haven't really lost anything. So, I have several questions pertaining to this. One, the Optiplex currently has a Pentium D at 3.4 ghz in it, running on a Intel® Q965 (ICH8) Express Chipset dell motherboard. Since the mobo is has an LGA 775 socket, could i replace the cpu with a core 2 duo E6700(if not, what is the best processor I could upgrade it to)? I found one for 20 bucks and it would run a lot cooler and allow me to use a MUCH smaller cooler on the cpu, which obviously would be useful for small spaces.

Second, could I overclock the E6700 on the dell motherboard in the optiplex? Here is the link to the spec sheet: https://www.dell.com/downloads/global/products/optix/en/opti_745techspecs.pdf

Third, for mounting the motherboard inside the desk, could I just screw the motherboard standoffs directly into the wood of the desk or do I need to attach metal to it first?

Fourth, does anybody know of a SATA power chord to 3/4 pin fan connector I could buy?

Fifth, since I might (still not sure) add in a cheap graphics card at some point, what is the most powerful card I could get that would not be badly bottlenecked by the E6700 (or Pentium D if I cannot switch them out.

Sixth, my final question, does anybody have any idea at all if the components in the optiplex would run fine on linux? I have windows for it but would like to try linux.

Also, could anybody reccommend some possible ram for it? It only takes certain types of ddr2 but i might upgrade from 2 gb to 4 gb.

I will not be water cooling as half the point of this is just to be a low cost kind of guinea pig computer desk experiment. I plan to mount one intake fan in the front, and two exhaust fans in the back.

Sorry for writing a book, any answers would be greatly appreciated!
 
1. IT shows the 6000 series available with it on the sheet you link, so it should work.
2. No, BIOS's are usually locked on Dells.
3. You could screw them in to the wood, but it won't be stable. They are what 1/8 or 1/16th of an inch for the threads. Not enough to screw into wood.
4. Amazon has them. http://www.amazon.com/SATA-Power-Adapter-PWM-Cable/dp/B00OT5GKPG/ref=sr_1_2?ie=UTF8&qid=1429145541&sr=8-2&keywords=sata+power+to+fan if you want PWM.
5. Only PCIe 1.0 While all cards are SUPPOSED to be backward compatible, not a lot are down to 1.0. Research cheap cards and see what one is.
6. Download a livelinux disc to usb and boot it. if it runs, then linux will run.

As for ram, whatever is compatible and you can find. DDR2 is expensive now.
 

Adviceasker

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Thanks for all the answers! Do you (or anybody else) know if the performance improvement would still be worth it if I could not overclock the E6700? Because without taking into account architectural improvements or efficiency (I know pretty much nothing about the difference between Intel processors that came before the core series) the E6700 at stock runs at 2.66ghz while the Pentium D runs at 3.4ghz.