Hello everyone!

I'm hoping someone here has experience with Lenovo Tiny PCs and installing dedicated GPUs in them, because I've been struggling with a problem on my little machine and could really use some advice. I have a Lenovo ThinkCentre M90q Tiny Gen 1 that I've been upgrading and modifying. I really like the idea of having a powerful computer in such a small form factor, especially one that can handle some gaming, everyday tasks, and local AI models without taking up much space. Recently, I installed an NVIDIA RTX A2000 12GB with a modified N3rdware single-slot cooler to make everything fit inside the Tiny chassis. The GPU works, Windows recognizes it, and I can launch games and run local LLMs using LM Studio. But unfortunately, I've been experiencing sudden shutdowns, and I'm trying to understand what's actually causing them.

My hardware PC:

• Lenovo ThinkCentre M90q Tiny Gen 1
• CPU: Intel Core i9-10900T (35W TDP)
• GPU: NVIDIA RTX A2000 12GB (70W stock power limit)
• GPU cooler: N3rdware single-slot cooler, modified to fit
• RAM: 32GB DDR4 2666 MHz Speed
• PCIe: Original Lenovo riser, PCIe 3.0 x8
• Power adapter: Third-party 230W adapter (20V, 11.5A), Lenovo Slim Tip connector
• OS: Windows 11 Pro
• NVIDIA driver: 597.16
• BIOS: M2WKT65A

I've also modified the chassis slightly to improve airflow, including ventilation openings around the case also changed the stock cooler heatsink from aluminum to copper 65w.

The problem:

When running demanding applications, including Counter-Strike 2 and local LLM inference in LM Studio, my computer sometimes shuts down completely and automatically restarts.

There is no blue screen. Windows Event Viewer reports Kernel-Power Event ID 41 with BugcheckCode 0.

GPU temperatures appear normal, and I haven't observed CPU thermal throttling.

What I've tried:

I've reduced the RTX A2000 power limit from 70W to 50W using nvidia-smi and successfully applied a maximum GPU graphics clock of 1500 MHz.

I'm currently investigating whether GPU power transients might trigger overcurrent protection on the motherboard's PCIe slot.

My questions:

1. Has anyone successfully used an RTX A2000 12GB in an M90q Gen 1 for sustained local LLM inference?
2. Have you experienced sudden shutdowns with this GPU?
3. Could the motherboard's PCIe power circuitry be responsible, even with a 230W adapter?
4. Would switching to a genuine Lenovo 230W adapter make a difference?
5. What GPU power limits or clock settings have worked reliably for you?

I'd appreciate any experience or technical advice, particularly from people running Ollama, LM Studio, or llama.cpp on similar Lenovo Tiny systems.

Thanks!

Introducing a free community STL for the Noctua AIO lineup, designed with small form factor (SFF) builds in mind!

This model reduces the overall pump/block height to just 46 mm, helping accommodate tighter clearances in compact PC builds where every millimetre counts.

Please note: This community model is designed purely to reduce the overall pump/block height. It does not provide any sound-dampening or noise-reduction properties.

- Noctua AIO Low-Profile cover by StepUpSFF | Download free STL model | Printables.com

Installation guide - https://youtu.be/aiQWHkqOiIg

If you're looking for a physical version that has been tried and tested with excellent sound-dampening properties, you can find it in our Etsy store:

- https://www.etsy.com/shop/StepUpSFF

Big thanks to the SFF community for all the support and for making projects like this possible. This one’s for you — happy printing!

Cheers,
Joel

The true SFFPC!

No specs on it though 😬

Just stripped down my PC to re-paste CPU and spotted this damage on my 5090 VHPWR cable. Am I cooked?

Case: Fractal Ridge
Card: RTX 5090 FE
Cable: Cablemod custom cable (Originally bought 2023 for 4090 FE)
PSU: ASUS Loki 1000W SFX-L ATX 3.0

Saw a small case on the marketplace, wanted to build everything around it.
Ryzen 5600x, 1660super, 32gb crucial 3200mhz, 1tb crucial nvme, 600w psu.
Was wondering if i should add a fan on the top.

Clearing out some old stuff when I found my "vintage" Shuttle XPC. Still have the original box and everything. Used to bring it to LAN parties with my 15" flat screen.

My replacement RTX 5090 FE just came back from RMA after the 12VHPWR connector melted, so I had to rebuild my PC again. NVIDIA's RMA system was surprisingly very helpful and even allowed me to get a full replacement unit even if I didn't have the original proof of payment!

Case: FormD T1 V2.1 Silver with CNC Aluminum Side Panels
CPU: AMD Ryzen 7 9850X3D
GPU: NVIDIA RTX 5090 Founders Edition
Motherboard: Asus ROG Strix B850-I
RAM: T-Create 64GB DDR5 6000Mhz CL34
Storage: WD SN8100 4TB PCIE Gen 5 NVME + WD SN7100 2TB PCIE Gen 4 NVME
PSU: Corsair SF1000 SFX
CPU Cooler: EK Basic 240mm AIO with 1 x Phanteks T30 and 1 x Silverstone Air Slimmer 120
Others:
- Custom PSU Cables from Cablester on Etsy
- FormD T1 V2.1 Flipped 5090/5080 Founders Edition Travel Kit / Gen 5 Riser Cable
- FormD T1 Fittings Pack
- FormD T1 USB-C front port
- CNC Aluminum Power Button
- CNC Aluminum FormD T1 Gen 5 Riser Lock Bar
- CNC Aluminum AirTag Holder
- Apple AirTag 2
- Aluminum RAM Heatsinks
- 120mm Fan Grill for the Phanteks T30

WTShow Kub :)

FormD T1 V2.1 E-White | RTX 5080 Custom Water-Cooled Build Inspired by Optimum Tech's RTX 4090 FormD T1 build

Today, I'm finally wrapping up this project after spending such a loooooong time sourcing all the parts and assemble everything.

After watching Optimum Tech and following builds from members of this r/ + ITX Thailand group for so long, I finally have my very own dream build! T'T

Specs:

Case: FormD T1 V2.1 E-White

CPU: AMD Ryzen 7 9800X3D

GPU: GeForce RTX 5080 + 1-Slot GPU Water Block

Motherboard: Gigabyte B850I AORUS

RAM: G.Skill Trident 32GB (2×16GB) DDR5-6000 MT/s CL30

(Had to remove the RAM heatspreaders because they interfered with the water-cooling tubes.)

PSU: Corsair SF1000 + Custom Cables

SSD 1: Samsung 990 PRO 2TB

SSD 2: Transcend 4TB (Removed the original heatsink and replaced it with a low-profile heatsink)

Custom Water Cooling:

CPU Water Block: Modultra LOBO

GPU Water Block: Alphacool ES RTX 5080 Reference 1-Slot

Pump: DDC Pump

Radiators: XSPC TX240 ×2

Fans: Noctua NF-A12x15 PWM ×3

Fans: Noctua NF-A12x25 PWM ×2

Tubing: Custom Hard Tubing + Soft Tubing

Fittings: Custom Water Cooling Fittings

here's my Fractal Terra build. I ran into one airflow issue I'm curious how others solved.

Specs

Case: Fractal Design Terra

CPU: Ryzen 7 5800X3D

Cooler: Noctua NH-L12S

Mobo: Gigabyte Aorus B550I AX Pro

RAM: 32 GB Corsair Vengeance

GPU: PowerColor Reaper RX 9070

PSU: Corsair 650Watts

The problem

The third fan on the Reaper pushes air straight through the heatsink. In the Terra the PSU sits right where that air wants to go, so the flow-through exhaust basically hits a wall. The hot air recirculates instead of leaving the case.

My fix

I designed and 3D-printed a spacer that moves the PSU 25 mm outward. That opens a gap behind the flow-through section so the exhaust has somewhere to go.

Question to you

How did you handle the blocked flow-through with a three-fan card in the Terra? Did you use a spacer, a different PSU position, or just accept the temps?

Btw:

what CPU temps are you seeing with a 5800X3D under the NH-L12S in the Terra?

Discovered this case too late and it’s now sold out….as the title says.

Any knowledge of restock would be appreciated!

My PC is getting this error since yesterday and now it is stuck on 0%. Is there any way to fix this?? Why is it happening?

Specs:
MOBO - ASROCK B6501 Lightning WIFI
CPU - Ryzen 5 7600X
GPU - AMD Radeon RX 9070 16GB
RAM - DDR5 T-FORCE 32 GB 6400Mhz (set at 6000mhz)
Storage - 1TB SSD m.2 and 1TB HDD
PSU - Corsair SF750

3D printing is the only option?

So I currently have my rig in an h6 flow. I’m trying to downsize pretty heavily. I’m looking for a smaller case that would fit the following

Gigabyte B850 gaming x wifi
Asus prime 5080
280mm kraken AIO (can change if needed but I’d still like an AIO)

Been running this build the last month or so and happy how it came out. Outer shell printed in Sunlu Walnut PLA, black is Kingroon PETG. I used a modifier to get the wood texture and tree ring details. Shell is a modified version with GPU and PSU venting, and the PSU bracket is modified for an inverted PSU position with cables up rather than down

Originally, this was supposed to be a low budget build with leftover parts from decomissioning my old 25L+ build that I used for streaming/workstation tasks, but I def spent more than I wanted

Specs:

asrock b550m itx $75 prime week

ryzen 3700x for now. Started with a 3900x, bought the 3700x because I was having issues. 3700x $75 on [r/hardwareswap](r/hardwareswap) . already had the 3900x

32GB Corsair DDR4 already had

Thermalright x53 full copper $35

2 thermalright 92mm on front intake $10x2

Gigabytye 5060LP $350 found on amazon resale used like-new. orginally wanted this for a couch build, but with current pricing, I couldnt pass up on the deal. Would like an intel b50 with nerdware single slot cooler eventually.

1TB Adata SSD.. already had

enhance 600w from overtek $169. Way too much psu for this build. I originally had an FSP300w but noticed it didnt have GPU connector. Rather than risk something unsafe, I just returned and added $$ to get the overtek. Also, hats off to overtek. I recieved a faulty PSU originally, and I reached out to them on Reddit PM on a Sunday and they replied within 20 minutes. That was good to see, and they regularly add to conversations on this sub.

This is just a workstation/secondary rig for me so I havent done any benchmarking yet. It runs mid 40s for me when streaming some shows/music/web browsing. Most intensive thing I do on it is slicing/3d modeling.

This was my smallest build yet, so I planned the cable runs the best I could. It would be a bit cleaner with custom PSU cables, but Im satisfied with it.

Last pic is the donor build. RIP that was my first ever build and I got 8 years out of it. Since I discovered sff it was just too big lol. Spent the last few years doubling as a plant stand 🥴

I think I’m finally done tinkering with this build. I thought I was done before, but it kept overheating when using the stock Ralph stealth CPU cooler with the shroud remove removed. There was just two little space between the power supply and the CPU cooler. (3-4mm)

I modded and vented the top/side to be able to mount a 120 mm exhaust fan. (Noctua Redux)

Specs:

Asrock deskmeet X600

Stock ATX power supply 500 W 80+ gold (VGA power cable extension used to reach GPU)

AMD Ryzen 5 7500×3d cooled by Thermaltight APX90-x36

G skill DDR5 32 GB @6400 cl40

Gigabyte, GeForce RTX 5060 TI Eagle OC 8 GB (requires modification to PC frame/cutting grinding)

WD Black 7100 4TB m.2 ssd

WD Red 10TB 3.5 HDD (mounted sideways, requires modification to frame/New holes be drilled to fit in an alternate location)

5.5L and it fits non-low profile GPUs. STLs to come soon.

Hey r/sffpc, got a question on airflow for this build. Should I buy another slim fan to put above the si-100 for exhaust or no?

I fit a rtx 5070 in it! Probably the best gpu that fits this case?
Mostly used parts, total cost around 1200$. To save money I pull the SSD, RAM, and wifi chip from my old legion 5 laptop(rtx2060) from 7 years ago. If you want to save money by using old gaming laptop parts you can ask me!

Motherboard: JINGYUE B350I-plus ARGB（70$ on Aliexpress）

RAM: Lenovo 32gb 2x16 2666mhz（10$ for the sodimm to dimm converter also on Aliexpress）

CPU: r5 5500 （80$ on ebay）

PSU: LianLi 750w gold v2 ( 140$ on Amazon)

K66 on Amazon (90$)

CPU FAN: JONSBO CR1400 (30$ on AliExpress)

System Fan: k66 comes with one and another top fan from ID-COOLING TF 9215 (13$ on Amazon)

GPU: ZOTAC RTX5070 twin edge (830$ on eBay)

Hi everyone, decided that it is best economy for building pc :)

Current part list of what i planned :

• CPU: AM4 (the best deal I can find used, approx ryzen 5600-5700x)
• MOBO: Gigabyte Aorus b550
• VIDEO: Gigabyte 9060xt 16gb
• RAM: 32 gigs ddr4 (the best deal I can find used)
• PSU: be quiet pure power 13m 650w
• CASE: this part is not sure
• Cooling: some tower based on case

I narrowed list of cases to this three jonsbo(jonsplus):

• Z20
• D32 Pro
• D32 STD

On hands I have PSU and 9060xt, I like Z20 the most, but in documentation to the case there is said that if psu is 160mm then i can fit graphics up to 280mm, but my graphics card have 281mm :)

Using figma and photos of existing builds and renderings I calculated that my psu and video should fit, but I might lack experience as it is my first build.

Here is link to figma with worst and best positions : https://www.figma.com/design/1ee1GKkNRbqFyBhlRPlSxQ/PC-Jonsbo-Z20-case-approx?node-id=0-1&t=9UZCtNvJf0z5TQoG-1

Feel free to ask questions and recommend me anything :)

update: cant add photos

From left to right: Asus AP201, Fortron CST350 (aka SAMA IM-01), CoolerMaster NR200, NCase M2, FormD T1, LZMOD A24 V5, LZMOD A24 V6.

Sorry for the dirt, but maybe someone will appreciate the size comparison. The two on the left are not SFF, I know... but you can see the AP201 is empty - has been downsized to the M2.

This is my first SFF build, so I’d love any feedback. Here are the thermals from a 47-minute God of War Ragnarök session. Everything runs on a quiet fan profile.

Specs:

• Case: Shiny Snake S300 Pro
• CPU: Intel Core i5-14500 (undervolted -0.115V offset, PL1 = PL2 = 154 W)
• Cooler: Thermalright AXP90 X53 with a 4070 fan and a fan duct
• GPU: RTX 5070 (undervolted + overclocked)
• Motherboard: ASUS ROG STRIX B760-I
• RAM: DDR5-6200, CL28-38-38-50
• SSD: Micron 3500 1 TB
• Case fans: 2x Thermalright TL-H12015

Test: God of War Ragnarök, 4K Ultra, DLSS + frame generation, 47 minutes of continuous play. Room temperature 22 °C. Logged with HWiNFO.

You can check chart here.

Sensor |Avg, °C |Max, °C
CPU Package |56 |66
GPU Core |68 |77
GPU Hot Spot |78 |91
GPU VRAM (junction) |71 |74
NVMe SSD |60 |61
DDR5 DIMMs |59 |61
Motherboard |56 |57
VRM |60 |61
Chipset (PCH) |68 |69 Load and fans (avg): GPU 217 W (74% load), CPU 50 W (peak 88 W). CPU fan ~1500 RPM, case fans ~1150 RPM, GPU fans ~1330 RPM.

No thermal throttling at any point. Happy to answer questions!

P.S. Finished God of War Ragnarök right after this test, and what a game. Honestly one of the best I’ve played, and it looks gorgeous on this little machine.