I downloaded WSJT-x-1.8-rc1 and ran it back to back on a pair on low spec Windows tablets.
Hipstreet W7in Z3725G BayTrail Atom CPU, 1GB Ram, 16GB Flash, old Win8/Bing + £1 USB audio dongle.
Linx 1010B Z3735F BayTrail Atom CPU, 2GB Ram, 32GB Flash, Win10Home 32bit r1607 + onboard sound.
The Win8/Bing tablet onboard sound drivers do not support 48kHz sampling which WSJT needs, hence the USB sound card. I don't recall 48kHz on the on board sound card being supported in the past so at some point the drivers for W10 on the Linx1010B have been updated and they now do support 48kHz using the on board sound.
I setup both machines running alternate periods on FT8 and added a cheap headset to the USB sound card and lthe internal mic/speakers on the Linx.
Both machines happily decoded each other's messages at the end of each period.
These low spec Atom machines run this and other WSJT modes with no problems. I think these may be the slowest x86 family chips on sale now.