Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: If the GD08B is rack mountable, what size is it? 4U or 5U? I am considering  ordering a 4U server chassis, but this may do.
Document: I read the manual. This unit needs a manual to build your pc. The inside is not standard rack htpc case. The manual is a p.i.t.a. it has 6 or 7 languages on each page for each step. It is not printed on the best paper and is hard to read.
This is unacceptable for my showcase 63U A/V/network rack.Both fit the GD08 case, have the same UPC, package markings, and dimensions on the package, although the artwork is different on the two different versions and matches the appropriate version included in the packaging.SilverStone verified that there are two versions and offered to replace mine through their RMA process. However, I have to send it to them first and pay the shipping.
OKAY UPDATE ON THE BUILD IS AT THE BOTTOM OF THIS REVIEW.I just had this delivered. This is the first part of the review. I unboxed it. Put it on my home theater rack. I have a 3 piece rack. Two towers left and right they have 20 inch wide 18 inch deep shelf. The center part of my rack hold the tv it has 2 drawers and 2 wide deep shelfs . This unit needed the 23 inch wide shelf that is 24 inches deep the ones under my tv.
I ordered this product in September 2012. I just got around to working on the computer this case was for. The size of the case did not look right. The dimensions amazon listed are wrong.
I was in the market to purchase a new HTPC case and really didn't know what I was looking for so I did some research on the internet and came up with this case.I like it because it's roomy, excepts full size components, and looks nice. No sharp edges. Build quality is good. I added another 120mm fan to the side to increase air flow.
When I first began looking for HTPCs, I wanted to go with a small form factor, but with lots of capability. Well, since I wanted to have room to use this as a NAS as well, small wouldn't cut it. Instead, I went with this case.While it isn't as small as some other Silverstone cases, this doesn't deserve to be called large either. I will say it is about the size of a capable mid tower- on its side.
Be sure to invest in quality fans and undervolt them for quiet operation.Do note that the case isn't tool-less, but all you need is a Phillips screw driver. To me this was a non-issue.Amazon had the best price on this case by over ten dollars and shipped for free with 2-day shipping as I am a Prime member. Unbelievable when you consider the size of the box this arrived in (over packed, where most cases arrive in their retail box).
It'll house full-size ATX motherboards and it's also very loud if you have all the fans connected and powered up. I left 1 fan off  because I didn't need that much cooling. You should consider that this will not be completely quiet when it's in the living room unless you go completely fan-less on all your components. You'll just have to experiment with your build.Overall, I'm quite satisfied with the purchase and I expect to see many years of use out of it.
Good case with plenty of room. I have a full size motherboard with two graphics cards mounted in it. I had a little trouble adjusting the button for the blu-ray drive but through a little trial and error I got it working. My motherboard has a usb 3 header and this case has front panel usb 3 ports. I don't have any usb3 devices so I can't test them. The case fans are very loud though.
The case has plenty of room to work with (pull out the drive tray bin) and I can use full size video card (usint GT610). Cable management is adequate... just take your time if you want the cables out of the way. I also added silent 80mm x 2 (Enermax) to the rear exhaust to cool the case. I'm also using a low profile Arctic Cooler (AMD version) with the stock fans it came with and the system is nearly silent.
Answer: It's rack mountable if you purchase this... Silverstone Tek Rackmount Ear Kit for HTPC/Desktop Cases RA02B (Black)Also, it's slightly smaller than 4U... about an inch or so.  Hope this helps.