Well this thread is dangerous... just made me grab a 3400 🤣
Newcastle core. Somehow every time in the past decade or so I went looking for speed over 2000 or PR over 3000, the prices were whack. So I never bothered, stuck with boring 2800s and one 3000, so not terribly inspiring. Some 754 boards gathering dust that I didn't really buy so much as "have turn up" with other things. Was a skip-over platform for me in the day, apart from mobiles, used the heck out of two s754 laptops.
So yeah I was skimming this thread again and went to fleabay to see if anything reasonable was around, and saw a recycler listing for an Athlon64 that was a 3400 for $12 CDN, so I caved and bought it, it helped that they also had a i5-3570k under $20 to split the shipping with.
Boards are a bit of a mishmash, I guess the "nice" one is the K8N Neo, then I've got an ECS with the SiS 761. Then maybe a Via board sitting in a buried case, which I know needs a recap, because ripple is huge. Then I thought there was another PCIe board around somewhere that keeps getting forgotten 2 secs after I look at it. Possibly it has an ATI Xpress chipset, because I have two intel 775s with Radeon Xpress and I remember thinking about trying a head to head.
Graphics are a bit of a problem though, since the nicer seeming boards have AGP and I haven't got any late/high end AGP cards and I am not paying eBay prices for one. Best I can do is a R9600, unless I perform a miraculous restoration on a long broken R9800. Got a bit of a better range in PCIe, but might want to keep it near to period with a 7800GT or something. So if the AGP boards get going, they might be chugging along on "placeholders" until I get lucky with better AGP.
Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.