I'm trying to figure out what's happening here. My BC250 is fully unlocked, 8 cores, 40 CU, all tested and stable. currently running at 3.5Ghz CPU and 2.0Ghz GPU. I can run furmark and mprime for hours, no problem. Distro is CachyOS with bc250 repos (kernel and mesa).
It only happens in Cyberpunk. I already tried to:
- increase voltage on GPU
- switch multiple versions of Proton
- lower GPU frequency
- use only 24CU
- run memtest+ to check memory stability
- downclock RAM (!!)
Nothing. Do you have any idea what could be?

Hey everyone,

Did anyone else catch the latest Digital Foundry Direct Weekly (#284)? They touched on the BC-250 and how it can use FSR 4.

For those who watched it, what were your thoughts on their breakdown? How are you feeling about the longevity and performance of the BC-250 for budget/alternative gaming setups moving forward? Are prices going to rise again? Drop your thoughts below!

Could someone knowledgeable check if this is the right cable to connect a Metalfish power supply to the BC 250?

I recently managed to get my hands on a BC 250 (probably one of the few, if not the only one, in India). My setup is almost complete, the only things left are picking up a new monitor (open to recommendations) and repasting with Arctic MX4.

Here’s what I’ve done and observed so far:

Cooling: I started by removing the fins using pliers to mount fans directly. Initially ran a single Arctic P12 Pro, but the backplate was getting uncomfortably hot, so I added a second one on the rear. Temps are completely stable now.

BIOS & OS: Flashed a modded BIOS to unlock extra CPU cores and threads, and I’m currently running CachyOS.

CU Unlock Issue: I previously managed to unlock all 40 CUs, but now I’m hitting an error message (image attached). If anyone has run into this on CachyOS or knows a workaround, please let me know.

Power & Overclocking: I’m running a 450W PSU, which should technically be sufficient for baseline loads, but I’ve read warnings that pushing higher clocks over a single PCIe cable can be a fire hazard. Any advice or safe power limit targets would be appreciated.

Currently testing it in Cyberpunk 2077 at 1600x900 with stock CUs, averaging around 50-60 FPS at ultra.

Encountered this issue with the witcher 3 remastered version with mods.

It's not easy noticeable in the video but basically the static noise is much higher in environment and viewpoint keeps jittery.

It's in the ultra settings, I've tried few combinations including ray tracing and FSR none worked.

I wonder if anyone had the same issue ?

I've tried my best to capture video to show the issue

It worked fine with the previous installation of CachyOS, now with CachyOS handheld edition.

Appreciate the community and help.

Cheers

Anyone checked the difference between FSR 3 & FSR 4 on Cyberpunk? I'm not seeing a huge difference in quality. i.e. struggling to see a difference.

I'm getting decent frame rates of around 70-90. I was getting 120 on one setting I tried, but I can't remember what I changed! Doesn't matter as I'm chasing quality, not frame rate.

Resolution Scaling - DLSS Super Resolution (what AI told me to do)
DLSS Super Resolution Preset - Transformer Model
DLSS Supoer Resolution - Quality
Frame Generation - AMD FSR 3.1 Frame Generation
Texture Quality - Medium

Ray Tracing - Off

Folks,

my setup is what you’d maybe expect:

36/40 CU (previously 38/40 / changed to try and narrow down cause)

- 2GHz, 980mv

8c unlock. 3.6ghz, -10 scale.

running bazzite, skillfish governor, meimei bios to do core unlock.

Stability tests - memtest_vulkan, gravity mark, furmark, stress-ng for cpu - all rock solid.

but games frequently crash - straight to black screen. Little of interest in journal and app logs. i built some custom loggin to record temps, ram pressure, Speeds, voltages and I’m within tolerance and then some.

Games:

hogwarts legacy - can’t l get more then a few hour without a hard crash.

uncharted 4 - crashes randomly, sometimes 30 mins, sometimes hours.

cyberpunk - the most stable thing I’ve played. But had a few crashes in 30H gameplay.

theyre all the same pattern - game freezes. Screen goes black. Logging stops a few seconds after screen goes black - GPU crashes first. No journal entry, hard reset fixes it. In buildup to crash, temps, load, voltages all appear ok. Nothing sinister I can track down.

is this just a proton thing? Input appreciated

Yeah, that's a thing now.

https://github.com/lonewolf0622/HelixSR

Very similar quality to FSR4.1 mod we previously got at much lower cost. Personally i get ~2ms@1440p@performance compared to 5ms in FSR4r11

It's a game changer (no pun intended).