Switch development has access to 3 CPUs and 3GB RAM

[Barkley]

Pemalite said:

The Switch's bandwidth is actually 25.6GB/s whilst docked or if a developer chooses to use the full 1600mhz memory speed whilst portable.
Otherwise portable mode it is 1331mhz (As per-digital foundry). Which would result in 21.2GB/s of bandwidth.

According to Eurogamers article developers can no longer choose to use 1600mhz Ram Speed in portable mode anymore.

"Additionally, adjustments have been made to available memory bandwidth. In our prior story, we revealed that in undocked mode, developers could choose between running the LPDDR4 memory at either 1600MHz or 1331.2MHz. The 1600MHz option is now only available in 'boost mode' - when Switch is docked - while 1600MHz support in mobile mode is deprecated." (source)