It’s not even necessarily that low depending on the standards you apply / references you use, lots of chips have base clocks which are quite low especially for low-power CPUs or SoC.
For instance the Atom x6200FE has a 1GHz base clock. According to its spec sheet it can’t even burst (while the higher-rated X6211E has a 1.2GHz base clock and can burst to 3).
Your problem’s more likely to be that it’s an Atom from 2008 (which implies lots of performance-related concerns, like being pre bay-trail and thus in-order), than it being 800 base / 1.3 burst.
For instance the Atom x6200FE has a 1GHz base clock. According to its spec sheet it can’t even burst (while the higher-rated X6211E has a 1.2GHz base clock and can burst to 3).
Your problem’s more likely to be that it’s an Atom from 2008 (which implies lots of performance-related concerns, like being pre bay-trail and thus in-order), than it being 800 base / 1.3 burst.