Hi Octet,
Your thread is super super amazing! Thanks very much for sharing. I’d love to know the parts list for your rig frame and the machine you are using to cut/drill. Even better, a youtube tutorial video, perhaps?
Great work once again, and those 3090s are just Etherium gold!
I have a friend that he needs to update thermals for 4 3090 FEs. Do you still remember what thickness pads we need for 3090 FE card?
Thanks.
Hope everything went well migrating to your new rig
Yes, migrated to the new rig, but have to redo the 45 deg brackets, they don’t work well with the FE GPUs. Running a lot cooler now as there’s more space between them.
Looks good!
Managed to get another 3090 yesterday, will be adding that to the rig on Monday and do a bit more cable management as it is all over the place now.
Hopefully the new brackets will be done next week too so I can finalise it and probably start building the smaller rig with new GPUs 
Looks like your rig is growing 
I am still waiting to parts to arrive - this coming week hopefully I get them all so I can start building things and changing thermal pads.
I have noticed in some of your earlier pictures that you are powering your PCIE risers with SATA - everything I have red so far says not to do this. There are horror stories about cable being burned out etc
Not sure if you are still using SATA to power PCIE risers but if you are you might want to reconsider and use 6 pin cables as it seems safer this way.
The only SATA cable in my rig goes to SSD. All GPUs and risers are powered by PCIE cables.
That’s good then
New 3090 GPU arrived today, added on the rig, working fine so far. I’ll have to open it and change the thermal pads at some stage since it’s a Palit, so the quality of the pads won’t be great.
Still waiting for the new version of the angled brackets to be finished so I can change the orientation of the GPUs on the rig, hopefully even better cooling.
Do you check in Windows your memory junction temperature after you change the thermal pads?
I just changed the thermal pads on all my 3090s.
In windows (with fans at 90%) I see 86C for memory junction temperature.
GPU temp is 48C (not as good as yours but I can live with that)
If I add a 120 fan at the back of the card memory junction temperature drops to 76C
My room temp is 23C
Not running Windows, nor do I plan to do, the GPUs are fine, running cold enough, no rejects, no thermal throttling, not even remotely interested at this stage of the memory junction malarkey
Yeah I am not running Windows either.
Just using it to verify the results of my mods
octed would you be able to post some information about the small LCD you have? I am looking at getting one too
Edit: also the tower fan you have - is that pushing air in or pulling air out?
Sure, full specs below:
1 x GIGABYTE X570 AORUS Master 6x SATA III DDR4-3200 PCIe 4.0 Motherboard
3 x Kolink PCI-E 1x to Quad 16 x Quad Mining / Upgrade GPU Adapter
1 x AMD Ryzen 5 5600X Six Core 4.6GHz (Socket AM4) Processor
1 x Noctua NH-U12A, Premium CPU Cooler with High-Performance Quiet NF-A12x25 PWM Fans
1 x Team Group XTREEM RGB 16GB (2x8GB) DDR4 PC4-25600C16 3200MHz Dual Channel Kit - RGB
12 x Ek Water Blocks EK-Vardar X3M 120mm DIgital-RGB (500-2200 rpm) Fan - White
1 x Samsung 500GB 860 EVO SSD 2.5" SATA 6Gbps 64 Layer 3D V-NAND Solid State Drive (MZ-76E500B/EU)
1 x Custom Aluminum 2020 profile 10 GPU Mining Rig Case Open Air Frame
11 x Pcs VER009S PCI-E Riser Card PCIe 1x to 16x USB 3.0 Data Cable Bitcoin Mining
3 x Artic Gold+ 1300W PSU
6 x 4.5m JOTO Cable Snake, Wire Tidy Wrap Cord Protector, Cat Dog Pet Animal Proof, Flexible Split Cable Sleeve Management Cord Hider Organizer Wire Loom - Black
20 x Thermalright Thermal Pad 12.8 W/mK, 85x45x2mm, Non Conductive Heat Resistance High Temperature Resistance, Silicone Thermal Pads for Laptop Heatsink/GPU/CPU/LED Cooler (various sizes - 2mm, 1.5mm, 1mm, 0.5mm)
10 x Thermalright TF8 Thermal Compound Paste 13.8 W/mK, Carbon Based High Performance, Heatsink Paste, CPU for All Coolers, Interface Material, 2 Grams with Tool
1 x ELECROW 7-Inch Raspberry Pi Screen with resolution 1024X600 HDMI Small Monitor
1 x Princess Smart Tower Fan, 50 W
11 x AWINNER® Gold Plated Super Speed USB 3.0 A Male to A Male Cable
GPUs:
5 x Nvidia 3900 FE
4 x Nvidia 3090 Palit
1 x Nvidia 3090 Zotac
1 x Nvidia 3070 Zotac
Thanks.
The Tower Fan is that pushing air in or pulling air out?
Pushing in AC cooled air.
Finally the GPU mounts were finalised and today I had a bit of time to load them on the rig and change the GPU orientation. Some pics below.
Looking good buddy!! Temps seem much better too specially for the middle cards.
Can you share the source files the 3d printed brackets?
2 more GPUs had the thermal pads replaced yesterday, 1 x Palit and 1 x Zotac. Forgot to take pics with the new pads fitted, but you can see how bad the pads and thermal paste was on that Zotac.
Looking into designing some custom brackets for the rear fans so they sit at an angle so they blow straight onto the GPUs. Will probably double the amount of fans too, see if that helps dropping temperature even further while I could get rid of that black tower fan.
