I have yet to find a flash card that would work as fast ram. Out of the three I have only one is even able to be used as storage and not consistently.
If you can find a 2M or 4M SRAM or PSRAM card you'd be better off. Unfortunately, they're still expensive. I've been watching eBay for some time and the 2M cards usually run around $40 used. I've been waiting for a nice 4M to come in at my local recycler but they only have 1M and less.
