A Low MSR is nice. But sometimes useless.

A good and sharp render result is a combination of different settings.
Crankng one up or down without the others leads to frustrations.

Poser 9 is 32 bit, so effectively 2GB at the most.

Be sure all textures are at quality or crisp, and no textures are at Texture filtering none.(or you loose texture catching, costing memory.)

Raytrace bounces, can stay at ONE.  Only go up if you have lots of reflections in your scene.
Irr Catching ON, and pull the slider all the way back to 0
IDL , ON at 7
Pixel samples at 3 for draft ; or 5-6 for quality. A higher setting is opening a CPU valve with little or no gain at all.

MSR, going below 0.2 is also costly at little or no gain.
MSR, normal test renders at 1.
Quality at 0.5
Ultra fine at 0.2

Gradually reduce bucket size untill render finishes.

Set Post filter size at 3 and Sync for sharper results.

Hover with your mouse over a value, and look at the help in the help window.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!