should i upgrade my computer hardware

[Displacement]

my model is 38MB, i found it's really slow when update material preview in VRay. my computer using Windows XP with hardware below:
Intel(R) Core(TM)2 Quad CPU
Q6600 @ 2.40 GHz
2.40 GHz 2.99 GB of RAM

should i upgrade hardware and operate system? what's the regular basic hardware requirment for properly running VRay in Sketchup?

thanks so much!!!

[Jackson_cg]

Re: should i upgrade my computer hardware

Nothing wrong with that spec, what size bitmaps are you using for your textures?

[Displacement]

Re: should i upgrade my computer hardware

i have a farely big map with 8368 x 8701 pixels

[Jackson_cg]

Re: should i upgrade my computer hardware

That's your culprit, that is very large for a material bitmap. Those sort of dimensions are common for backgrounds and HDRIs, but I've never needed to use anything bigger than 4000 x 4000 px for textures and that was for extreme close-ups. Where did you get a texture bitmap that size from?

[Displacement]

Re: should i upgrade my computer hardware

i required the image from manufacture. it's for a waving ceiling. my problem is the UV map ruby script doesn't work for curved shape, so i edit a huge map in Photoshop instead.