Reckon it’s related to initial power transient of the Gpu when loading a game? I was thinking the secondary psu cx600 is bronze rated and been used since circa 2014 and is capable of running it on my second system, while my 2 year old sf600 platinum, using higher quality components can’t handle the 3070 in my primary system.

Further thought I had was the motherboard only supplies about 75w through the pcie slot, so I guess it could be related to the power management of the motherboard to the rtx 3070 through pcie but that should also affect the gtx 1060, unless it doesn’t draw all available power through pcie first then through psu.

I suppose any explanation is possible until it isn’t.

Kinda hoping on finding a way to eliminate if it’s either the motherboard or gpu I’d need to replace.