Version Two
The prototype Breathe was literally a dream come true for me. It worked; but it was far from perfect. Here are all the changes and improvements I've made to the case for version 2 in batch 2.
New dimensions
Length: 183.1mm
Width: 115.1mm
Height: 346.9mm
Volume: 7.31L
Length and width remain unchanged. Height increased by 16mm.
This addition in height was to increase the internal space of the case.
The 16mm of extra height is portioned between 3 areas of the case.
1mm in the top, ~12mm in the middle, and ~3mm at the bottom.
1mm added to the top of the case was used to deal with the motherboard being too close to the I/O cutout, helping fix the issue of I/O shield bulge.
12mm added to the midsection of the case to provide more space between the PSU & 2.5" drive cluster and motherboard, giving a lot more free space for cables. This fixes the issue of power cables interfering with RAM slots and gives enough room for normal straight SATA cables to be used with the 2.5" drives without them being cramped.
3mm added to the bottom space of the case to give greater compatibility for 90 degree IEC C13 power cords for the PSU. I provide a north american power cable included with the case, but it came to my attention in batch 1 that international customers are forced to find a compatible power cable of their own that fits into their country's respective power outlets. This extra space in the bottom should make it easier for international customers to find compatible 90 degree power cords. This was accomplished by making the feet of the case taller, which you can see below.
The prototype Breathe had 28.5mm of space at the bottom. Version 2 will have 31.5mm.
These height changes also increase the maximum compatible graphics card length to 322.1mm, up from 309.1mm in the prototype.
New Wraparound Exterior Panels
Most computer cases only have two side panels that need to be removed in order to access the internal components. So why shouldn't my case do the same?
In hindsight, it didn't make much sense for the prototype to require four exterior panels to be removed in order to gain full access to the components.
So I consolidated the 4 exterior panels into 2 identical wraparound panels.
This makes it so you only need to remove one panel to access components on the motherboard side of the case and the other panel to access components in the GPU side of the case.
This change also reduces the total number of unique parts of the case - making manufacturing simpler, reduces the total screw count, reduces the total PEMsert nut count, and makes the structure of the case even stronger, mitigating the problem of inward/outward flex of the side panels in the prototype.
Ventilation Changes
Vent pattern changed to a staggered, hexagonally oriented hole grid. Gives a greater free area for even better air flow. Holes are 7mm in diameter.
Unventilated margin on the left and right sides of case's larger faces increased. This was done to help emulate the ducting effect of my
second thermal test on page 10. I noticed that the case exhausts hot air by blowing almost all of it out of the slimmer sides of the case. The larger unventilated margin in the faces perpendicular to those slimmer side faces should help to funnel that hot exhaust air outwards from the case and prevent recirculation.
Other Improvements
- PSU mounting holes changed into slots to make it easier to install the PSU.
- Increased the size of the cable management cutout/skeletonized the lower part of the motherboard tray to reduce weight, since the weight of the case was a criticism in batch 1.
- Widened the CPU cutout to further reduce weight.
- Beefed up the smaller tab of the motherboard tray to make it stronger and less susceptible to being bent.
- Removed the second set of PCI-E riser mounting holes. Being partnered with Li-Heat, it doesn't make sense for me to support the EZDIY riser anymore.
- Changed the riser mounting holes into PEMsert standoffs. Removes the need for the use of long screws and spacer nuts as in the prototype, which weren't the best at mounting the riser.
- Also moved the riser standoffs 1.2mm upwards from the prototype's original location to fix a particularly complicated issue of the graphics card being tilted in two directions; upwards and outwards. I determined from the prototype that this problem was caused by the base of the graphics card not being close enough to touch the top panel by about a 1.2mm gap. I had to push the graphics card's I/O bracket into the top panel in order to screw it in, which caused the tilting of the graphics card. The PCI-E riser acted like a fulcrum to the lever that is the graphics card; a fulcrum that was out of position, but now is in the right place, which should solve the graphics card tilt.
- Changed the motherboard standoffs from M3 to 6-32. I noticed in the prototype that if I overtightened the motherboard mounting screws, the standoffs are small enough to be forced into the mounting holes of the motherboard. The increased diameter of the 6-32 standoffs will prevent this.
- Also moved the motherboard standoffs 1mm downwards to help fix the issue of I/O shield bulge.
- Enlarged the cutouts in the sides of the motherboard tray to further reduce weight.
- Lengthened the PCI-E indent in the top of the motherboard tray to increase compatibility/reduce potential problems with graphics card I/O brackets.
- Shifted the position of the graphics card screw holes in the top panel downwards and leftwards to make it easier to screw down and install graphics cards.
- Removed the dividing crossbar in the I/O cutout for the graphics card since it is not needed. Also further reduces weight.
- Widened the motherboard I/O cutout in the top panel to make installing I/O shields easier and further help fix the problem of I/O shield bulge.
- Enlarged the hole for the power button to prevent the thickness of the powder coat from interfering with installation of the power button.
- Deepened the cutout indent on the graphics card side of the bottom tray to make it easier to screw in the bottom tray. Also to reduce weight.
- Fixed the position of the third mounting hole for a 3.5" drive in the bottom tray to allow for the fastening of that third screw.
- Lengthened the smaller flange in the side panels that wraps around to the larger sides of the case to give better spacing with the screw countersinks. This change also was needed in order to increase height of the case feet.
- Deepened and widened screw hole countersinks throughout the entirety of the case to give better aesthetics and solve the issue of protruding screw heads as in the prototype.
That's all for changes/improvements to the design.
- - -
I expressed in the past that I want to pursue colors in this batch, so. . .
Black? White? Red? Gray? Some other color? Tell me what colors you'd like, so that I can know which will be the most desired colors and appropriately proportion the quantity of each color to order in this batch before I send the drawings over to Sliger.
There will definitely be more than 10 cases available in this batch, so more people will be able to get their hands on a case.
Also, due to the increased height of the case, I'll be using some different, better shipping boxes this time around with some better cushioning as well. The case will also come assembled in this batch.
Yep, that's all. Thanks for being patient with me. It took a while to fix everything I wanted to.