The 5900x cpus are $150 cheaper on amazon than 3900x. They don’t come with a cooler and have the same performance on average. Some tweaks were needed to boot them up.
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The one thing missing in the SFXOS instructions is it doesn’t mention going into BIOS and setting RAM profile for XMP speed. By my observations of my rigs (not SFXOS rigs), that gives about a 1k/sec increase per rig for the 3900X (and presumably similar for the 5900X).
But you obviously need a monitor/kb/m to temporarily hook up each rig to a screen and make the BIOS change on a reboot, and then unhook and get them back up and mining again.
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I figured out how to set the RAM profile for XMP speed in BIOS as stated above. It was far less complicated than I feared.
It did bump me up the food chain a bit too as far as hash rates are concerend. Thanks for the heads up @aussiesloth, still in the game!
FYI out there, the 5900x’s run far hotter than the 3900x’s for the same hash rate, it’s a mistake, especially if you live in a hot climate. Bin picking up 3900x’s used on ebay for $150 each.
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