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#11
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The MSI 970 does not support the FX-9590 (or FX-9570). What your source meant was that because they are physically both AM3+ socket that they will FIT together, but they are not in fact compatible in any other sense. That is why you’re seeing fluctuations in your base clock – it is being throttled.
You really need a top-notch 990FX board with a LOT of overclocking headroom to make a 220W CPU function at stock without discernable problems. But I still wouldn’t recommend it. And the reason you’ll need a top notch 990FX board instead of a lower-budget variety (crummy VRM), is because they are all physically limited to 140W TDP (shortchanging your CPU 80 TDP). What's basically going to make those higher-end boards able to handle those chips, is a good VRM that is going to be constantly making up the difference (eating your erstwhile OC headroom). The reason I still wouldn't be able to recommend that solution to anybody long-term and with a straight face, is because that is simply just not a good solution long-term - VRM's don't like to be constantly overdrawn indefinitely (it's why OCers go through motherboards more than the rest of us).
So, if you’re dead set to keep the 9590, then you’re basically limited to the Crosshair Formula Z (8+2 VRM), Sabertooth R.20 (8+2 VRM) or the Asrock Extreme9 (12+2 phase VRM). Even then, you will never be able to fully benefit from the potential performance of that chip in a 140W TDP board.
If in your shoes, I would return/sell the 9590 for an 8350/70 (fully supported, doesn’t require top of the line 990FX). AND they also DON’T attempt to melt your board (the real problem with the heat of them, not just limited to the CPU or socket itself). But then, I’m in the “not dropping $200+ for a board” camp.
Bottom line, you need to get that chip off of that board.