STM32F103RCT6 Using Problem

[Masonhuang]

Hi, all
Several days ago, I bought a devboard with a STM32F103RCT6 chip on it. According to the datasheets, that chip has 48 KB of RAM and 256 KB of flashrom.
However, when using the linux arm-gdb and the st-util and st-info, they say that the chip actually has 64 KB of RAM (so more then exptected).
(STM32F103RCT6 datasource: stm32f103rct6 chip datasheet
Using gdb (writing to memory and reading back from it), it does look at there is indeed 64 KB of RAM in the chip, ... but I do not find any reference to that chip with 64 KB of RAM.

Is there anyone has any idea what is going on here?

[LubOlimex]

Which board exactly did you purchase? What is the hardware revision? The name and the hardware revision are printed on the board itself.

[LubOlimex]

We usually use STM32F103RBT6 in our designs.