PlanetZ forums @ scopeusers.com

Liquid EDGE wrote: Sat Feb 21, 2026 2:42 am Anyhows, my psu blew up the other day when i was plugging the power cable back in. (Was moving stuff about etc) super scared the whole computer would be dead.

fidox wrote: Sat Feb 21, 2026 11:45 am

Liquid EDGE wrote: Sat Feb 21, 2026 2:42 am Anyhows, my psu blew up the other day when i was plugging the power cable back in. (Was moving stuff about etc) super scared the whole computer would be dead.

Good that it was only the power supply and that the rest works.

Mine psu is Chieftec Nitro 85+, 950W Modular, 10 years old now, serves me well.

Btw, about cset.ini file where's the line
[HW]
IntBlkSize=512

Changing this value , for example to 1024 or higher makes any differences, never tried this setting ?

valis wrote: Sat Feb 21, 2026 9:39 am I can see that, if the GPU or CPU were changing power states and the PSU wasn’t keeping up with the draw, clamping down as it shifts between states, it would generate transients that might cause buffer delivery issues while the logic settles.

valis wrote: Sat Feb 21, 2026 9:41 am My 3090 was just shutting the machine off occasionally until Nvidia found power spikes under certain conditions were common to all users. Driver update updates of since fixed it, but I’ll now limit my GP usage to a hard stop of 98%.

Think of intersample peaks causing analog converters to go above their headroom when a digital form has too many samples in a row at max value. Unless converters have headroom, they will generate distortion.

The same thing happens with power delivery in general

Liquid EDGE wrote: Sun Feb 22, 2026 4:16 am
How do you limit the GP?

Liquid EDGE wrote: Sun Feb 22, 2026 4:11 am Cast.ini file?? Not sure I’ve looked at that and don’t really know what it is.

nebelfuerst wrote: Sun Feb 22, 2026 6:33 am

Liquid EDGE wrote: Sun Feb 22, 2026 4:16 am
How do you limit the GP?

Limiting the GPU is only relevant, of you are using GPUs above 100W. 3080,3090.. up to 5090 will possibly require limiting GPU power.

Note: Even if your powersupply claims to deliver some specified Watts, it typically has problems to sustain max power. So it's a good practice to have a PSU, that can deliver 150% of expected max power.

Depending on your brand of GPU, there's a tool of the vendor to finetune/overlock the GPU, where you find the limit.
A more general tool is MSI Afterburner.

I have systems with 2x3090 and a CPU with 250W, which don't work stable with 1000W PSU, so I went for a 1300 W PSU.

Scope cards are neglectable compared to power requirements, compared to modern GPU/CPU.

fidox wrote: Sun Feb 22, 2026 7:13 am

Liquid EDGE wrote: Sun Feb 22, 2026 4:11 am Cast.ini file?? Not sure I’ve looked at that and don’t really know what it is.

Yea, I was using that sometimes, when I had 3 cards connected (now i have just 1 , I am waiting to see if they can fix my other two cards)
I was changing sequence of cards to load them in Scope later, etc.

Liquid EDGE wrote: Sun Feb 22, 2026 7:16 am I’m in Xite-1.

Liquid EDGE wrote: Sun Feb 22, 2026 4:16 am (Ps I accidentally reported your post,,,, lol.)

fidox wrote: Sun Apr 26, 2026 11:01 pm Despite applying all the recommended BIOS and Windows tweaks, I was still getting occasional audio clicks and pops.

Then I read somewhere that I should try to change in BIOS under Power Management - Power Loading from "Auto (Dafault)" to "Enable".
This applies to my Gigabyte mobo with Z170 chipset.

Since then, I haven't had any issues.

valis wrote: Mon Apr 27, 2026 7:14 am

fidox wrote: Sun Apr 26, 2026 11:01 pm Despite applying all the recommended BIOS and Windows tweaks, I was still getting occasional audio clicks and pops.

Then I read somewhere that I should try to change in BIOS under Power Management - Power Loading from "Auto (Dafault)" to "Enable".
This applies to my Gigabyte mobo with Z170 chipset.

Since then, I haven't had any issues.

This is similar/related, this feature seems intended to keep the power draw high enough to avoid issues with PSUs that can't handle super low loads, so a load is 'simulated' (dummy load) by keeping sleep states higher or etc. Most of the reports have to do with shutdowns that I see online, but I can see this impacting things by keeping the system more stable too (perhaps the CPU is kept in a higher package state?)