

I don’t know how to do this on AMD boxes but there are tools out there to adjust CPU power limits without undervolting, it uses the chip’s built-in ability to throttle itself. I’ve had to do the reverse on a Dell which limits itself to 0.8GHz on any non-genuine™ power adapter, but in that case I limited the (Intel) CPU’s PL2 (long-term power limit) to 25W rather than its spec 35W to save power. It thus keeps itself throttled below 25W consumption by the CPU.
I’m sorry I can’t be more helpful with names of tools to try, but I just packed up all my gear to head across town, I’ll try to come back and drop some URLs later. I have a little 5750GE box so I’m interested in whatever the solution turns out to be.







Also there are some good 5825U boxes out there, but it’s still more oomph than you need for seeding.