|My guess is it was a driver issue?|
"this monitor can handle 1152x864 @ 75 hz, because the last graphics card i had allowed me to do that"
What graphics card did you upgrade from? The Geforce GT 610 is a pretty low end card, it's actually just a rebranded GT 520. And even though your card has 2GB memory, it's slow DDR3 @ 64-bit rather than GDDR3 or GDDR5 @ 128-bit. A gaming card it is not.