Build for

FLUX.1 schnell (12B)

Hardware requirement

Estimated

Running FLUX.1 schnell (12B) as FP8 in ComfyUI at ~8,192 tokens of context.

VRAM to run on GPU

14 GB

16 GB class card

System RAM

32 GB

recommended

Storage

2 TB

NVMe recommended

GPU importance

Critical

memory-bound workload

How this is calculated

Model weights derived	11.9 GB	11.901 billion parameters × 1.00 bytes/param (FP8) ≈ 11.9 GB.
Runtime overhead estimate	2 GB	Fixed VRAM overhead for ComfyUI (activations, CUDA context, fragmentation headroom).
Total VRAM to run fully on GPU estimate	13.9 GB	Weights + KV cache + overhead. This is what you need to keep the whole model on the graphics card for full speed.
Recommended system RAM estimate	32 GB	Headroom to load the model, run the OS, and hold any layers offloaded from the GPU. Rounded up to a standard kit size.
Storage estimate	2 TB NVMe recommended	Local model files are large (often tens of GB each). An NVMe SSD keeps load times reasonable.

Memory figures are estimates derived from published model facts using a fixed method. They are not benchmarks. We do not publish tokens-per-second figures because we have no measured source for them.

This model does not expose transformer attention dimensions (typical for diffusion image models), so context/KV-cache memory is not modelled. The estimate covers weights plus runtime overhead only.

Recommended builds

Minimum

"It runs."

$208 reference total

Runs FLUX.1 schnell (12B) (FP8) in ComfyUI fully on the GPU at ~8K context.

GPU VRAM

16 GB

Est. draw

463 W

PSU headroom

40%

Compatibility: Incompatible

Graphics Card
Asus ROG STRIX GAMING OC

$0

This model needs about 14 GB of VRAM under lean settings. The Asus ROG STRIX GAMING OC (16 GB) is the most affordable card that holds the whole model on the GPU.
Processor
AMD Ryzen 5 7500F

$0

Local AI inference runs on the GPU, so a capable budget CPU like the AMD Ryzen 5 7500F keeps costs down without holding the model back.
Motherboard
Asus TUF GAMING B650M-E WIFI

$0

Matches the CPU socket (AM5) and DDR5 memory; a solid value board with room to expand.
Memory
Corsair Vengeance RGB 32 GB

$91

This model wants about 32 GB of system RAM; the 32 GB DDR5 kit covers it with headroom for the OS and offload.
Storage
Crucial P3 Plus

$62

1 TB of NVMe — local model files are large (tens of GB each), and NVMe keeps load times short.
CPU Cooler
NZXT Kraken Elite 360 RGB

$0

Keeps the CPU cool and quiet under sustained load; compatible with the chosen socket.
Power Supply
MSI MAG A650BN

$55

Estimated system draw is about 463 W; the 650 W unit leaves headroom for GPU power spikes and efficiency.
Case
Deepcool CH160

$0

Fits the motherboard form factor and has clearance for the graphics card ( mm).

3 of 8 parts have live offers.

Graphics Card
Asus ROG STRIX GAMING OC

$0

This model needs about 14 GB of VRAM. The Asus ROG STRIX GAMING OC (16 GB) holds it with comfortable headroom for longer context and running other apps alongside it.
Processor
AMD Ryzen 5 7500F

$0

The AMD Ryzen 5 7500F is a modern DDR5 platform — plenty for feeding the GPU, prompt processing, and everyday work, with an upgrade path.
Motherboard
Asus TUF GAMING B650M-E WIFI

$0

Matches the CPU socket (AM5) and DDR5 memory; a solid value board with room to expand.
Memory
Corsair Vengeance RGB 32 GB

$91

This model wants about 32 GB of system RAM; the 32 GB DDR5 kit covers it with headroom for the OS and offload.
Storage
Samsung 990 Pro

$170

2 TB of NVMe — local model files are large (tens of GB each), and NVMe keeps load times short.
CPU Cooler
Corsair iCUE H150i ELITE LCD XT

$0

Keeps the CPU cool and quiet under sustained load; compatible with the chosen socket.
Power Supply
MSI MAG A650BN

$55

Estimated system draw is about 463 W; the 650 W unit leaves headroom for GPU power spikes and efficiency.
Case
Deepcool CH160

$0

Fits the motherboard form factor and has clearance for the graphics card ( mm).

3 of 8 parts have live offers.

Max performance

"For users who value performance over budget."

$8,247 reference total

Runs FLUX.1 schnell (12B) (FP8) in ComfyUI fully on the GPU at ~8K context.

GPU VRAM

48 GB

Est. draw

758 W

PSU headroom

45%

Compatibility: Unknown

Graphics Card
PNY VCQRTX8000-PB

$3,297

The most VRAM available here (48 GB) — maximum context and headroom, well above the ~14 GB this model needs.
Processor
AMD Threadripper 3990X

$2,700

The AMD Threadripper 3990X handles heavy multitasking, data prep, and CPU-side tokenization alongside a top GPU.
Motherboard
Asus TUF GAMING X570-PLUS (WI-FI)

$0

Matches the CPU socket (AM4) and DDR4 memory; a solid value board with room to expand.
Memory
Corsair Vengeance RGB Pro 32 GB

$87

This model wants about 32 GB of system RAM; the 32 GB DDR4 kit covers it with headroom for the OS and offload.
Storage
Samsung 990 Pro

$170

2 TB of NVMe — local model files are large (tens of GB each), and NVMe keeps load times short.
CPU Cooler
Asus ROG STRIX LC 360 RGB GUNDAM

$1,621

Keeps the CPU cool and quiet under sustained load; compatible with the chosen socket.
Power Supply
Cooler Master V SFX Platinum

$207

Estimated system draw is about 758 W; the 1100 W unit leaves headroom for GPU power spikes and efficiency.
Case
NZXT H9 Flow (2023)

$165

Fits the motherboard form factor and has clearance for the graphics card (435 mm).

3 of 8 parts have live offers.

Totals are the sum of current reference prices for each part, not live retailer pricing. Component choices are made purely on technical fit. We may earn a commission when you buy through links on this site. It never changes the price you pay, and it never affects which hardware we recommend. Learn more.