Minimun GPU mem requirements

[FXHash]

Hello, 

i am try to run hashcat on two older nvidia gpus (9500GT) with 1 GB ram
and i am running in this error:

Code:

* Device #1: This device's local mem size is too small.

* Device #2: This device's local mem size is too small.

I cant't find the min. gpu mem specs. for running hashcat.

Can anyone help?

Thx
  FXHash