  The $\epsilon - p$ is calculated from lattice simulations of two dimensional
${\cal N}=(8,8)$ $SU(N)$ SYM to test the gauge gravity duality. We employ the
Sugino action with keeping two of sixteen supercharges exactly on the lattice.
The thermodynamics of this gauge theory is described by the black 1-branes at
low temperature. The internal energy density $\epsilon$ and the pressure $p$
can be analytically estimated in the gravitational theory. The lattice results
in $N=12$ show that $\epsilon - p$ of the thermal SYM reproduces the prediction
of the gravitational theory for the dimensionless temperature $T_{\rm
eff}<0.4$. This clearly indicates that the duality is valid in this system.
