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Hi first post so I hope not to boar you. About a year ago
I bought the 755 a new PSUand it sat in the garage. A few weeks back I started to play with it.
Well the PSU is so loud I called the guy who built it. All he said was he no longer makes it and I can buy replacement fans. Soo I'm looking for a PSU for the 755 the one in now is 350W and would like to stay there. Any help with this would be great. Now the XPS8700 I bought a
SeaSonic SS-660XP2 660W R I just found out the power unit needs to be Haswell compatable, does this just mean the 1150 socket? So if anyone can set me straight that would be cool

Hi have you tried looking up your specific model of computer on Dell's website. I seem to remember they have technical manuals for things like chassis and PSU. You can look up the specification/form-factor and then find a manufacturer who makes a compatible PSU.

Dell likes to use awkward, expensive to source PSUs in its towers, and having managed a fleet of 700 of them at one point, I can tell you that they're all cheap, low-quality units too. It's one reason I never buy dell workstations anymore.



The 755DT is a custom L-shaped thing, so you'll need to VERY CAREFULLY dismantle it (don't touch any traces or components with a screwdriver, be aware there are that the big capacitors can still deliver serious shocks even after it has been disconnected) and find out what fan is inside and come back for more advice. Chances are good that it's a stardard 120mm 12V case fan which is easy to replace, even if you do have to solder a few wires.

As for the XPS8700, I've replaced a couple of those myself with decent PSUs myself. The originals are oversize so you have to drill/dremel a couple new screwholes to mount it in the case, but the unit itself is ATX wiring spec so your Seasonic will work. Don't worry about "Haswell compatible" only really terrible and old PSU's don't meet that requirement.

Yep pretty much all the big computer manufacturers are pretty much like Chrispy's picyure they sure like to save money on copper that is for sure the wires are barely long enough and they usually only have a spare molex and a couple SATA connectors that are barely long enough to use.

This is the reason I had to get the trusty USB powered Thermaltake 80mm fan with the adjustable speed knob to help keep my refurbished microcenter Gateway slim tower cool with its hefty 220 watt PSU.
Best 229$ I have spent on a whole "i3 2120 4GB ram 1tb HDD etc" PC minus the 40$+18$ for the HD6570LP GPU and TT fan.
Still sporting the stock PSU.