Drop-in GPU Bracket Assembly (version 2)

Fully assembled drop-in bracket for Rosewill server cases (version 2):

Drop-in bracket

This bracket adds the ability to mount 7 GPUs at front of Rosewill L4000, L4000B or L4500 server chassis.

See the end of this page for small adjustments to be made when assembling the reversible bracket!

Remove all of the brackets and drive cages from the front of the Rosewill case.  (See this video).

Replace or re-install the case fans so they are oriented to exhaust/push air out of the front of the case.

Insert M3x35mm bolts, two washers and hex nuts through the fan mounting brackets.

Attach the top angle bracket to a fan post via a M3x6mm bolt, washer and hex nut.  The bolt goes the the round hole in the bracket (nearest to the hole that is ~12mm from the end/top of the post).

Attach the fan posts to the fan beams using M3x25mm bolts and washers. The bottom 25mm bolt goes through the oblong hole in the bottom angle bracket.

Insert/slide the hex nuts of the fan cage bolts into the front slots of the fan beams.  The location of the left-most fan is ~1/2-inch from the end of the beam.

Start M3x6mm bolts at the bottoms of the side posts.

Attach the side posts to the side beams by sliding the head of the bolt into the top slot of the beam and then tighten the bolt by inserting the wrench through the wrench access hole.

Milled-out area in the beam should be at the top surface:

Attach the front beam to the right-hand side post and beam sub-assembly via a M3x20mm bolt and washer.

The front beam should overhang the side beam by ~1mm.

Place the sub-assembly into the case.

Attach the front beam to the left-hand side post and beam sub-assembly via a M3x20mm bolt and washer.

Push the bracket up against the front of the case.

Fasten both side posts to the sides of the case using flathead M3x20mm bolts, washers and hex nuts (utilizing one of the recessed case holes).

Insert the fan support sub-assembly into the case (routing the wires through the sub-assembly).

Push the sub-assembly forward until the fan brackets are flush with the front of the case (this might require loosening and re-positioning the fan brackets).

Fasten the fan sub-assembly to the base by inserting a hex nut into the top slot of the side beams (via the milled-out area), pushing the nut underneath the large angle bracket and attaching it using a M3x6mm bolt and washer.

Repeat for the right-hand side angle bracket.

Insert seven M4 hex nuts into the slot of the milled GPU support beam.  Fasten the beam to the small angle brackets using M3x14mm bolts (the support beam has a 3mm threaded hole).

Insert seven t-slot nuts into each riser support beam.

Loosely attach the riser supports beams to the base using M3x6mm bolts and hex nuts (inserted via the milled-out areas).

Attaching the risers to the beams using two M3x10mm bolts at opposite corners of the USB riser board.  For a seven card rig, the boards should be space 15mm apart.

Adjust the placement of the riser beams (front-to-back) by test fitting with a GPU. Tighten the riser support beams to the base!

The GPUs are bolted to the bracket via M4x5mm bolts (Phillips head).

Reversible Bracket

When assembling the reversible bracket, the side posts are re-purposed as beams to support the GPU mounting beam.  Also, the small 90-degree angle bracket is attached to the post via the oblong hole (the round hole is enlarged to accommodate an M4 bolt used to attach the GPU beam to the angle bracket).

The side beams are attached to the case via small M3x6mm flat-head bolts and hex nuts.