Well, I can get some g.skill 8,000s with stock heatsinks and no fan on it errorless for ~4 hours on a z790 ProArt, 14900k on air (NH-D15) @ 7600
I reeeealllly doubt they're actually errorless for ~5-7 days though as they're hitting 62°c, and I don't care really to validate that long on a board I don't intend to daily any more: in my mind anything +50°c is going to error sub-12 hours
My Encore comes in tomorrow so I can tell you in a few days where it lands with stock heatsinks, basic xmp, same setup but with a fan on the ram (not the encore fan)
after I get that I plan on taking the crap g.skill heatsink off and putting them in some Bykski Copper Airs, I'm guessing they're going to get about 7800 errorless (5 day stress) but who knows. Ddr5 is a hot mess. But that's what makes it fun eh