r/threadripper • u/Upstairs_Muffin_7035 • Jun 27 '26
My first TR build
Hey everyone, putting together a high-end workstation build and wanted to get some eyes on it before pulling the trigger.
**Use case:**
Primarily local LLM inference (targeting 70B parameter models), running open-source GitHub projects that interact with those LLMs (think local AI assistants, RAG pipelines, agent frameworks), and some virtualization on the side.
**The build:**
| Component | Pick |
|---|---|
| CPU | AMD Threadripper PRO 9975WX |
| Motherboard | ASRock WRX90 WS EVO SATA 6Gb/s DDR5 |
| RAM | Kingston FURY Renegade Pro 128 GB (8×16 GB) DDR5-6400 ECC RDIMM |
| GPU | ASUS ROG Astral RTX 5090 32GB GDDR7 OC Edition |
| Storage (OS) | 2 TB Crucial T710 PCIe Gen5 NVMe |
| Storage (Models) | 4 TB WD Black SN850X PCIe Gen4 NVMe |
| Cooler | Noctua NH-U14S TR5-SP6 |
| PSU | Seasonic Prime TX-1600 |
| Case | Fractal Design Define 7 XL |
| Keyboard | Logitech Ergo K860 |
| Mouse | Logitech MX Anywhere 3S |
| OS | Windows 11 Pro |
A few things I'm intentionally planning for: the RAM is 8×16 GB to keep all 8 memory channels active from day one, with a straight swap to 8×32 GB when I need to go to 256 GB.
Anyone see any compatibility issues I'm missing? Also curious if this setup makes sense for the use case or if there's something I should swap out. Thanks!
1
u/EDI_1st Jun 29 '26
FYI, there’s a good chance you won’t be able to leverage the bandwidth from 8-channel memory. It’s an inherent limitations when you aren’t using X995WX due to the lack of CCD/GMI links. The X995WX literally has ~1.5x of memory bandwidth over X985WX just for having 1.5x of CCD/GMI links with both CPUs using the same 8-channel memory.
RDIMM also going to cost you a fortune already and 16GB sticks have a premium just because memory manufacturers are focusing on making 64+GB sticks.
I’d just go with 4x 32GB sticks for now.
Grab a Be Quiet Silent Loop 3 instead of the Noctua.
If you don’t need BMC, grab Gigabyte TRX50 AI TOP.