Dead e7300?
Dead e7300?
Purchased numerous untested 775 cpus for a low price. I anticipated most would function properly, as CPU issues usually stem from dirt accumulation on pads or smds. Some ran immediately without cleaning, while others required a light spray of 99% IPA to remove grime. Eventually, four failed completely—two needed extra wiping, one needed scraping with a needle or razor. One e7300 was stubbornly non-functional, though the back appeared mostly clean and only had minor issues like missing capacitors. Cleaning attempts didn’t revive it. It seems this particular e7000 is severely damaged, possibly due to a power surge or a single missing cap. I’ve tried multiple IPA cleanings without success. It’s puzzling given its cleanliness compared to other e7000 models; one e7500 had severe plaque needing a razor and needle, yet it still worked after cleaning. The worst was the middle CPU in the photo, which looked much worse but could be revived. Overall, these cpus are largely unusable except for a few salvageable units.
But it wouldn't stop at 00, 00 means completely failed, c1 (for gigabyte p35/45 mobos) = general error. It would trigger a general error if the device was too degraded to run stock voltages—00 simply indicates total failure. Also, 45nm processes are stable up to about 1.6V, and most people avoid running above 1.45V mainly due to cooling problems that cause serious die damage (like IHS heat transfer on these Wolfdales). The only way I see it shutting down in OC is if it runs above 2.1V, which forces a voltage setting higher than safe and results in instant failure.
I don't trust fixed voltage levels; I focus on maintaining their longevity through proper cooling for most chips. The semiconductor selection process rewards resilience, as different chips vary in sensitivity.
You just gave a clear breakdown of safe volt levels. It seems silicon lottery influences performance differences, as shown in the Ryzen testing. I’m okay with 1.6V being safe since 32nm nodes handle 1.55V without issues—running at 1.55V for longer periods keeps things stable (VccSA/VPTA = safe voltage). It makes sense that older chips degrade more than newer ones. For the 775 series, I don’t have cooling set up yet, but it should improve once I get my waterloop running. Degradation definitely affects reliability—extreme drops can cause failure, and heavy degradation usually leads to stock performance issues. My golden E5400 survived a fall from about 150cm, but that’s still a possibility.