Do you need a powerful computer that comes in the form factor of a credit card? The new ROC-RK3566-PC from Firefly should fit the bill, supporting up to 8GB of RAM and an M.2 NVMe SSD which should be plenty for many workloads.
To kick things off, this pint-sized PC packs a quad-core Cortex-A55 running at up to 1.8GHz alongside an ARM Mali-G52