The Dell Precision T3630 itself makes a GREAT budget  performance system if you are into content creation, animation, or other computationally intense work.  Unfortunately the refurbisher (in this case a company called Technique Tech) is HORRIBLE and I had to spend more money to get this system up to speed making it less of a value that it seems.First of all this system came with Dell's most anemic 300 watt power supply which has NO PCI-E power cords which GPU's (graphic cards) need.  So I couldn't add a GPU card to this system without buying a better power supply.  The weak power supply and it's lack of any PCI-E power adapters wasn't disclosed in the listing and wasn't expected given the system's form factor and the fact that mid-towers main purpose in life is to be able to accept larger cards like a GPU.Second Technique Tech is sloppy and included BROKEN parts.  The power light on the power button doesn't work, one of the SATA cables has a broken connector stuck in it so it can't be used, and the DVD drive doesn't work at all.  Again, it was sold as "renewed" which means it should have no failed parts.Performance systems use dual-channel RAM which requires TWO DIMMs.  Rather than two 8GB DIMMS, this system had a single 16GB one running in single channel.  I'm guessing this was the refurbisher being cheap and or lazy.This system has two types of drive slides in the 3.5" bays - a style that holds two 2.5" form factor drives and a style that holds 3.5" drives.  I can tell by the marker writing noting the model of the system on the sleds that the refurbisher Technique Tech doesn't keep the parts with the systems they are from and just slaps them together and my system unfortunately only had one sled for 3.5" drives with the rest being for 2.5" which is really impractical and probably not how they come from Dell.  I had to go to eBay to get the sleds I need (that the system probably originally came with).The system also smelled like musty office carpet with a hints of cigarette smoke and middle-age body oder.  Every time that I left a job run on the system and the fabs spun to blow out the heat it got worse.  You could see dust in all crevasses and none flat areas too.  The system was only blown out in the most superficial way and not cleaned well.I work in IT so I dealt with these issues myself because I needed to have this system up and running ASAP, but I shouldn't have had to.  This is the worse "refurb" job I've seen and Amazon shouldn't allow Technique Tech to sell "Amazon Renewed" anymore.