r/sffpc

I’m building my first ever SFF PC this weekend, and the last decision I need to make is the CPU.

I know the 9850 performs better, while the 9800 is more efficient and runs cooler.

How have people found the 9850 in SFF builds? Does it require extra careful thermal management above and beyond the 9800?

Case: nCase M3 Grater
PSU: Corsair SF1000
CPU: 9800x3d or 9850x3d
GPU: ASUS ROG Astral RTX 5080 OC
MB: ASUS ROG Strix B850-I
Ram: Kingston Fury 64GB (2x32) CL30
SSD: Samsung 9100 Pro 4TB
Cooler: Noctua NH-D15 G2
Fans: 3x Noctua 140, 1x Noctua 120 (Rear intake, top and front exhaust)

My B650i bricked itself suddenly so I had to swap it out (goodbye $400) but I loved the chance to tinker and get to make the cables in my Ncase T1 as tidy as possible

5070 mini just arrived in the mail in the Philippines for Php 47795.00 (776 USD)

I was going for a CPU upgrade and decided why not go for a new SFF case while at it. With the current RAM-pocalypse and ever-increasing GPU prices I simply reused most of the previous components I had with my previous Deepcool CH160 build.

Components

- MSI B650I Edge WiFi
- AMD Ryzen 7 9800X3D
- G.Skill Flare X5 DDR5-6000 CL32 32GB
- Gigabyte RTX 4070Ti Super Eagle OC 16GB
- 2TB Lexar NM790 Gen 4 SSD
- 2TB Lexar NM710 Gen 4 SSD
- Corsair SF 750W SFX Platinum PSU
- Cooler Master NCORE 100 Air
- Thermalright AXP90-X47 Full Copper
- Noctua NF-A9X14 PWM with NA-FD1 fan duct mod

Overall I very much like the clean tower aesthetic of this 14.7L case, it takes up a much smaller footprint on my tiny space-constrained desk. I work in production and the sleek silver look matches well with my MacBook Pro, which is nice and very reminiscent of the original Mac Pro cheese grater cases imo.

Cooler Master definitely nailed the vibe and fit with this case! The NCore 100 Air and its bigger brother the NCore 100 Max are definitely paying great homage to the Corsair One style of vertical tower cases!

Hello guys,

Just wanted to show appreciation towards the world of this form factor, here is my personal SFF collection, most of the parts I've bought through sales and bartering over the past few months, my Terra build is my main gaming build ofc, and the ThinkCentre is a mix of gaming/home server use.

The Terra is equipped with a Ryzen 7 5800xt, an Rx9070 XT, 64gb Kingston 3200hz ram, 4tb SSD, CPU is on eco mode for better thermals, I came from a 5600xt GPU so it's absolutely mind blowing seeing stable 4k 60fps gaming. Also just looks gorgeous in the Jade. My main setup basically.

The 920x is powered by an i5-8500, Nvidia A2000 with single slot kit, 32gb Kingston ram, 1tb SSD, I was excited for this one a lot because I can have a full Linux PC in the living room to do some streaming and store shared family photos and movies, and double it as a Steam Machine of sorts just playing titles that are great on the TV, especially some Tabletop Simulator or Jackbox.

I have been building and tinkering with PCs ever since I was little when my dad would bring computers from the IT department of his work, and as of a couple months ago, I've become obsessed with small form factor PCs, they've always made sense to me as I never really had the money nor the desire to build monster PCs with dual GPUs and crazy liquid coolers, I love the different shapes of SFF you can find and being able to repurpose them in different use cases. And idk, looking for the parts themselves to get good deals gives me a kick too lol

Previous pics of me enjoying peak SFF before my month trip flight. I can safely say it IS possible to run a pc on the airport plugs. Should you? I can’t say for certain LOL.

Was cleaning my case and just wanted to share the amazing view view of my 5090 just barely fitting into the NCASE M2 with literal millimeters to spare.

The ASUS TUF 5090 only just fits into this case thanks to its beveled edges, but unfortunately its also a heavy beast and sags a lot without support. Since I also bring my PC with me while traveling on occasion, I wanted to create something that would fix the sag and help hold the GPU in place so the board doesn't get damaged in transit. After some time in Fusion 360 and with a little bit of trial and error, I designed a 2 piece bracket that holds the GPU in place from top and bottom. It uses preexisting case holes to screw in, and the holes are sized so that regular M3 screws can tap into the plastic without the need for heat-set inserts or anything like that. My 5090 is undervolted, but since the support is only right on the edge of the card, the PLA I used to print it seems to do just fine with the heat output of the GPU. Been using it for months and it hasn't melted or warped significantly yet.

I'm unable to upload to Thingiverse at the moment because my account is too new, but I'll have the files for the bracket uploaded about 24 hours from the time this post goes live, and anyone will be able to download them for free. I'll add the link to this post when that happens.

As you might be able to tell from the last photo, it's not possible to fit this mammoth GPU into the M2 without a 12VHPWR adapter. The one I chose is the same one sold by MODDIY, and it's been going strong for a few months now with no issues. The same adapter can be found on Amazon here (I verified because I bought from both Amazon and MODDIY and both have the exact same model number and manufacturer name, with only the text on the aluminum housing being different). I'm aware that there's a lot of uncertainty surrounding adapters like this, and for good reason. However, MODDIY support told me that they have sold many of these connectors and have not had a single report of a fried GPU, so... take that for what it's worth.

Anyway, thanks for taking a look at my build.

Jonsbo z20 (20L)

Shiny Snake s450 (12.4L)

FormdT1 (9.95L)

Archer X mini (6.9L)

Sorry if the pictures aren’t that clear. I took them in a hurry with my phone.

Is adding those fans even if its a little bit obstructed worth it?

Also what is the better set up a thermalright x67 with a noctua 120x15 fanswap

or a

Thermalright x53 full copper with a noctua fanswap, a thermalright nvme heatsink with 30mm fan and a noctua fanduct?

Looks great. Going to build something in the next days.

Build Specification: Ncase T1 v2.5

Core Components

CPU: AMD Ryzen 7 9800X3D

Motherboard: ASRock B850I Lightning (Latest BIOS)

GPU: NVIDIA GeForce RTX 5080

Memory: 64GB DDR5 (6400MHz CL32 kit, manually tuned to 6000MHz CL30)

Storage: 8TB WD_BLACK SN850X w/ Thermalright HR10 Pro Cooler

PSU: Corsair SF850 (Custom Motherboard Cable)

Chassis: FormD T1 v2.5 (Black)

Cooling & Airflow

AIO: Corsair RS240 AIO w/ Phanteks T30 Fans

GPU Fans: 2x Thermalright Extrem LCP (3150RPM)

Custom Modifications & Accessories

GPU Cooling: Custom Deshroud mod

Chassis Additions: 3D-printed Top Hat (Etsy)

Structural: Locally 3D-printed, heat-tapped GPU anti-sag bracket

Performance & Tuning Profile

CPU: Undervolted at -25 All-Core in BIOS.

GPU: Overclocked and slightly undervolted; 111% Power Limit (400W) via Afterburner. 

Stability Testing (40-Minute OCCT Power Stress)

CPU (9800X3D): 75.14 °C (Avg) | 76.25 °C (Peak)

GPU (RTX 5080): 68.17 °C (Avg) | 68.45 °C (Peak)

GPU Hot Spot: 82.55 °C (Avg) | 83.33 °C (Peak)

Gaming Benchmark (Black Myth: Wukong Benchmark @ QHD Ray Tracing and Cinematic setting DLSS no Frame Gen )

Average Framerate: 127.7 FPS

CPU Temperature: 53.0 °C (Avg) | 59.2 °C (Peak)

GPU Temperature: 61.4 °C (Avg) | 65.9 °C (Peak)

Real Gaming ( Arc Raiders: Highest settings, Frame Gen on 4x Model M @ QHD )

Average Framerate: 468.9 FPS

CPU Temperature: 51.3 °C (Avg) | 55.6 °C (Peak)

GPU Temperature: 60.4 °C (Avg) | 63.9 °C (Peak)

System Idle Performance CPU Idle: ~41.0 °C | GPU Idle: ~36.0 °C

Ram & Storage where bought in a sane time.

| Category | Price In CAD (Pre-Tax) |

| :--- | :--- |

| CPU | $650 |

| GPU | $1,809 |

| Motherboard | $229 |

| Storage | $600 |

| Chassis | $337 |

| Cooling & Mods | $335 |

| **Total MSRP (Pre-Tax)** | **$3,960** |

| **Total Cost (Incl. 15% Tax)** | **$4,554** |

My fisrt sff case and the moding after

S300 build specs:

* KXRORS/Shinysnake S300 case
* Minisforum BD790i (AMD Ryzen 9 7945HX)
* 96GB DDR5-5600 SODIMM (Crucial)
* NVIDIA RTX 5070 FE
* 4 TB Crucial P3 Plus SSD
* Corsair SF750
* Linkup PCIE5 riser

Incidentally, the GPU and CPU in the DGX Spark are both about the same as the SFFPC build in terms of performance. Obviously, the Spark has unified memory, allowing for AI stuff. The Spark's memory bandwidth of 273 GB/s is a lot faster than the 96GB 5600 MT/s host memory of the x86 system but slower than the 700+ GB/s bandwidth of the 5070.

My original setup was up in a warm loft and had the card blowing inward with stock settings. GPU temps would climb to 85-90C in 10 minutes while gaming at 4K. My RAM, CPU, SSD, and motherboard were cooking. It sounded like a hair dyer with a notable buzzing coil whine, and the entire loft would be uncomfortable to sit in for more than 30 minutes.

Then I found a reverse airflow kit on etsy and had the realization that with the mod I could decouple the spine from the GPU with some spacers leaving over an inch wide gap for airflow. I just needed to reduce my CPU cooler height. I went with the Thermalright X53 full copper with a noctua fan instead of ID Cooling IS-77-XT. CPU temps on the 9800X3D are excellent and there's no turbulence with the gap on the side panel.

These tweaks in combination with undervolting the GPU and moving the setup into a perpetually cool basement has the GPU in the 65-70c range under heavy 4K gaming, rarely exceeding 70c. It's virtually silent with no turbulence, coil whine is reduced to a forgivable hum, and the basement temps never appreciably change.

This configuration effectively resolves the thermal hurdles I had when running the 5090 FE in the Fractal Terra.

Hey, so I just checked their website randomly today and saw pre-orders are available again, so I got mine. I don't understand why they never send out notification emails, I never got one for the initial pre-oder nor this one.