FormD T1 v1.1 Anti-sag PCI Rail attachment for RTX 4090 FE

thingiverse

### What's this? This is a PCI Rail attachment that I made for the FormD T1 v1.1 case, to be used with the RTX 4090 (and 4080) Founders Edition graphics cards only. It uses the existing SSD mounting holes of the T1 v1.1 front panel and the PCI Rail mounting holes on the new 40series Founders Edition cards from Nvidia. This was done as part of an upcoming build video. Check out my [YouTube channel](https://www.youtube.com/@EIGAtech) if you found this interesting or helpful. Note that your exact tolerances may differ from mine, so be extra careful if you decide to test this for yourself and double-check everything. ### Benefits: - Eliminates sag - Better alignment on the horizontal axis - Safer transport Print files: - T1 PCI Rail Attachment: This is the part that goes onto the T1 front panel - 4090 PCI Mount (Riser Default Position)* - 4090 PCI Mount (Riser High Position)** *Untested. **This is the position I use and the one seen in my photos. The GPU riser is mounted in the highest position. This allows for a more vertically centered position, with ample room for the 12VHPWR connection. Note that for this position, one of the riser mounting holes is shared with the motherboard standoff thread (coming in from the other side). You can use a female to female M3x6mm spacer on the motherboard side and a longer M3 bolt on the riser side. ### BOM: - 3x M3x5 bolts - 2x M3x8 bolts - 3x M3 threaded brass inserts [aliexpress](https://www.aliexpress.com/item/1005003452755028.html) - opt: 2x M3 washers ### Installation: Best to do all this with the PSU and motherboard removed. You should also remove the T1 spine to make your life easier and avoid collisions. 1. Mount the 4090 PCI Mount to the GPU by first removing the magnetic cover (I use gaffer tape). 2x M3x5 bolts are needed here. Washers can be used on the GPU side for fine tuning. 2. Install the GPU 3. Slide in the T1 PCI Rail Attachment from the side and attach it to the front panel. 2x M3x8 bolts are needed. 3. Once the two parts are fully mated, use one M3x5bolt to lock them together. ### Questions: Can I use this on the T1 v2.0? No, the v2.0 has a single piece front panel and the holes needed for mounting the attachment are not present. What riser cable do you use? I use the LINKUP PCIe 4.0 Reverse GPU Socket 23cm