Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Does this support full sizes power supply?
Document: This case is sturdy, looks good but has a downside and that is although the description states you can use a full size ATX power supply and you can, what it doesn't mention is it's at the expense of using the 3 1/2 drive bays.
It's just organized horizontally on two separate levels. I ordered a new extra small sized Micro-ATX power supply in advance after reading the reviews here and complaints about regular full size power supplies being a very tight fit. The purchase of a special "small" power supply was unnecessary.
Maybe if you had a 1000 Watt monster power supply with the back full of LED color matched removable wires, there might be a space problem. My 460 Watt power supply fit just fine by flipping it upside down.With this case, I found it easier for my fat clumsy fingers to mount the motherboard, fit in the screws and route the wires than any full tower case I've ever worked on. The manufacturer didn't include enough brass spacers that fit between the case bottom and the motherboard.
You can install up to 4 additional fans other than the 120mm fan included which is: one 60mm in front on the upper deck blowing on the hard drive chamber, two 80mm fans in the rear lower deck behind the CPU and one rear 80mm fan in the upper deck next to the power supply.
I'm not that controlling, so I connected the case fans to the motherboard instead.My only significant complaint is one of those little things that can really irritate. The case has an insanely bright blue LED "power on" light mounted on the front above the power button. Even in bright daylight, it hurts to look at it. To avoid flash spots and blindness,  I dabbed on some liquid black electrical tape (in the electrical section of any hardware store).
the case is bigger that it looks in the photos and when filled is quite hefty
still room for another 3.5 hdd or a couple of ssd's. in the external 3.5 bay i put in a card reader/3.0 usb/eSATA device. horizontal 140mm cpu fan fit easily in the bottom half and covers most of my ram for added cooling there. i added two 80mm fans at the rear. one on the upper half and the other on the lower half. my mb runs in the mid 20'sC, and my cpu never hits 40C, even oc'd.
i love this case! the upper/lower hinged layout is excellent. i had no problems installing the optical drive and the case door works fine. my psu was long so i just removed the hdd cage and moved my 3.5 hdd to the lower 51/4&#34; opening and the case door hides it beautifully. the case drive bay doors are ventilated and that helps the hdd and od run nice and cool.
The red LED is overly bright as well, but doesn't cause pain like the blue one does.
The photo makes this case look more plastic and smaller than it really is. This is a heavy steel case and if you're fitting it into a small space, be sure to check the measurements with a tape measure before ordering.The upper and lower plastic front face plates are removed by pulling them straight off the face of the unit just like stereo speaker grill covers. Only friction holds them on.
Answer: the answer is both yes and no.  the hard drive bay sits behind the ps.  for some full size ps's you'll need to move the hd's.  one option is to move them to the other side of the case behind the optical drive if you have one.  the whole hd bay will fasten in there, right behind where the optional rear fan would go.  makes keeping them nice and cool very easy doing that.the other option, and the one i chose, is to just buy an adapter and mount your hd in one of the optical drive slots.  there are cooling vents in the od doors and they still run very cool there.  both options leave you plenty of room for your ps.  the ps i have is a dual 80mm fan type (about 535w) and it too helps move cooler air through the upper part of this case.  this is a very cool running case.  my mb temps stay in the upper 20'sC and the cpu stays in the low to mid 30'sC even when overclocked.  one nice thing i did was to add an internal card reader into the 3.5 floppy bay.  the one i chose also gets me a usb 3.0 port on the front of the case.i really like this case.  it's not that small, being fairly wide, but it is just so easy to work on inside and allows every component to run so cool.  worth every penny, imho.