1. Is the bottom plate pre-drilled and tapped for the ATX screw pattern?
2. Can the video cards be screwed into the beam at the front, if so, how? (Like a standard case to keep them from shifting from side to side).
#1 - Yes, the sheet is drilled for an ATX motherboard (or MEB/SWTX for the larger 4p size tray) and comes with 7/8-inch tall aluminum spacers i.e. the spacers are fastened to the sheet with 1/4-inch bolts. #2 - Yes, the expansion cards are "clamped" to the expansion card support beam. The lower half of the support beam consists of 1/8-inch thick aluminum flat bar and the upper half is 1/4-inch thick aluminum flat bar with a 1/8-inch thick piece of foam glued underneath it. The foam prevents the cards from shifting side-to-side. The lack of individual mounting holes is directly from what these trays are designed for, which is F@H (which don't typically have any expansion cards) and bitcoin mining (where the expansion cards are raised above the MB and spaced far apart). |
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Beware that Koolance contraption has an aluminum radiator. You could mount 3 120mm wide radiators across the width of a rack. Imagine a variation of one of my radiator stands (a three rad wide version) mounted in between the rails.  What's the total wattage that needs to be dissipated? |
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bump  |
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Here's a pic of what I was thinking...  The PCI mounting bracket is removed. The (new) overhanging piece of aluminum bar presses down onto an edge of the GPU card. |
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Either that, or cut the backplanes and only leave the very top screw mount and the overhang (so it balances on the beam).
This is the part that I want to get fabricated, so I can keep the original brackets for resale. Unless someone wants to sell me a bunch of brackets? They could actually be from any reference card model, as long as it has the 2 screws at the top, since the rest would be getting chopped off. Would this single wide bracket work? EDIT: More info here. Available here for ~$2 each. I bought a bunch of these, and they were a flop. The tabs don't line up with the mounting holes on the cards, so I had to chop them off, and then I realized that the screw holding the bracket on was pushing the card away from the support beam. The stock bracket is held on by the DVI connector screws, since I had removed the top screws so the card would fit flush to the support beam. I guess I'll see what kind of hash and temps I can get with the stock bracket, and then move to 5970s or 7990s with a proper single slot bracket. Sorry to here about that. What if the top "clamp" part of the PCI support bracket was a lot wider? Is there enough of an edge/surface on a GPU card that a wider clamp's foam could press onto? |
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Either that, or cut the backplanes and only leave the very top screw mount and the overhang (so it balances on the beam).
This is the part that I want to get fabricated, so I can keep the original brackets for resale. Unless someone wants to sell me a bunch of brackets? They could actually be from any reference card model, as long as it has the 2 screws at the top, since the rest would be getting chopped off. Would this single wide bracket work? EDIT: More info here. Available here for ~$2 each. |
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To properly mount those fans, you could remove one of the "beams" in the top, placing it in the front in between the posts.
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I've been considering that. Not exactly sure how well the angle connectors will conduct current though, some seem to be plastic, and others are bolted with a metal connector. It would suck to have the slightest loose connection, which is why I was considering copper busbar.
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The t-slot extrusions are anodized. All of the angle brackets are cast aluminum. |
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That thing is a beast!!!! What are the outer dimensions if I might ask?
Its only 17 by 41 inches. One of the key features of this tray is its flexibility. The placement of all the floor "beams" are adjustable (horizontally), along with the vertical placement of the PCI and extra GPU support beams. Plus all manor of hardware can be attached to all of those t-slots. |
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Second, what app are you using to model the rig frame? I need to do something similar but don't know what would be good software to use for mocking up ideas.
Its the the free Google Sketchup. There's a library of computer component models at http://scc.jezmckean.com/home, which you can import into your own model. |
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Send me a PM if you want a heavy duty all aluminum tray designed specifically for mining. 
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Those DPS-2000BB power supplies are a nice find.
Only problem I just discovered is that they do not have their own fans. So it will be necessary to hook up some fans to them so they don't overheat and die. Also, the 2000 watt version is less efficient than the 2500 watt version, and the 2500 watt version isn't for sale anywhere that I can find. Are there mounting holes for fans and for what size? |
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I'm curious as to how much heat that pump is going to add to the loop.
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I need a 10.5-inch long (or greater) GPU to photograph suspended above one of my tech trays.
I'll reimburse you for shipping to 03063 plus $10 for your trouble.
PayPal only.
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Bump. |
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I'm pleased to announce a new option that will allow you to securely mount hard drives to almost anywhere on the tray.  $5 for one set.  More info here. |
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The floating GPU brace is now infinitely adjustable across the entire depth of the tray.  |
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is it possible to see it in action (do you have any 5830s you can put on this to show how that works?) apologies for all the questions/suggestions.
There's a customer review here. I've taken up his suggestions to increase the height of the posts and I've switched to using 1/4-inch thick aluminum for the PCI bracket "clamp." |
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it's a nice design.. I do have some suggestions though... if we can somehow move the middle standing bars back and forth with some kind of L shap and a screw thumb?
i've posted an "after" picture if the bars can be moved... the reason being that if this can be adjusted then that would allow for flexibility for graphics card placement... how tall is the bar where the pci brackets are and how tall is the middle bar?
as for the picture below... this would be great if both bars' height can be adjustable (move higher or lower). the middle one should be able to move back and forth... (the bar can probably be cut shorter for allow for easier movement if it's stacked...
The PCI (back) posts are 8-3/4 and the GPU brace posts are 4-1/4. The GPU brace posts can be moved back and forth via three fixed ~30mm increments, plus the beam can be bolted to the posts on either side. Both support beams are fully adjustable vertically. |
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