is that true that the CPU cache memory is very important to increase the speed of rendering .?
geforce 9400gt is that a good graphic card for 3dmax ?
The things that will most improve speed, roughly in order of appearance, are:
Buss speed and level one and two memory cache - More is better. The faster the buss speed the faster the processor can swap out computations into its level 2 cache and then read them back in. Buss speed therefore can have a large impact on both FPU and CPU calculation times. The more cache memory you have available the faster the operation becomes because the CPU does not have to rely on the much slower system RAM to store information in.
Memory amount, type, and speed. Faster and more is undoubtably better. Swapping out to the hard drive for increasing memory should be considered the last possible option for increasing system memory. The speed of the read/write to disk operation is like walking compared to driving a car. Here again is were buss speed is a major player in the fast rendering game.
Your OS and number of applications open. Closing open applications, including background items like system monitor, task scheduler, internet connections, windows volume control, and all other applications people have hiding in the background, can greatly increase rendering time by stealing cpu cycles. Open task manager and see what you have open and then close everything but the absolute necessities. Other multi-tasking OS's have other methods of determining open application and should be used accordingly.
And lastly your graphics card. This may seem unlikely to you but it is true. If you have a simple 16 bit graphics card your render times, compared to other systems with the same processor and memory but better CG cards, will be equal. No more no less. If you play a lot of games or watch a lot of mpeg movies on your system then by all means own a good CG card. If it is rendering and raytracing you want to do then invest in the best system speed and architecture your money can buy. The graphics cards with hardware acceleration are designed to support fast shading of simple polygons, prevalent in the gaming industry, and offer no support for the intense mathematical number crunching that goes on inside a rendering/raytracing program like Pov-Ray, Studio Max, and Lightwave. If your modeling program uses OpenGl shading methods then a CG card with support for OpenGL will help increase the speed of updating the shading window but when it comes time to render or raytrace the image its support dissapears.