Any one of those will run fine on 255w without having to disconnect things.  So sometimes redxps and I differ on disconnecting things. SSD is recommended over HDD.  Not only is power consumption less (5v vs. 12v), but SSD performance is better with faster read/write speeds  The Quadro P1000 is definitely worth considering over the K1200.  [URL]  Also throwing in just for comparison:  [URL] 
I have a Dell 9020 Small Form Factor. Specs: i7 - 4790 Processor, 3.6 ghz 16 gigs of RAM Windows 10, 64-bits It's the original PSU or a refurbished one at 255 watts   I've read several of the similar discussions here, but want to ask my own, computer specific question.  I'm looking for a good graphics card for my Dell 9020 SFF.  I have a sound card in the smaller PCI slot (I guess it's a PCIx1 slot), so I need a single slot (is that the right term?) card.  It looks like I have almost exactly one inch of width available for the graphics card to fit.  But I assume I'd want/need a little extra room for proper (or reasonably close to proper) ventilation for the card. I need a graphics card for video editing (mostly on Davinci Resolve).  I currently have an AMD Radeon R7 450, but it can't keep up with the demands of Resolve.  I'm not a gamer and really don't need the graphics card to do anything well except work with Resolve (and video editors in general). Do you have any suggestions?  I'm hoping to spend a little less than $200 and I might buy a used card on eBay or some similar web site. Thanks in advance.
Graphics card for 9020 SFF