Video ram -System ram Video-cpu System-cpu

[MAVrecK]

Alright this question has been on my nerves for a long time, so i finally decided to ask, and hopefully someone has a logical answer.

Why do video boards have ram that runs stable in mhz way higher then the top system ram when slot into our mainboards?I run my ddr on my ti4200 at 600 sometimes, i'd like to see any of the newest system ram do that.What is the problem of using video ram quality on systems?

Why do video boards have cores that are so much slower then a cpu? After all isn't it just crunching 1 and 0's? Why not just use a core of 3.0ghz on the newest nvidia or ati? I know it would be very costly but there surely would be a market for such a high priced card that would absolutely whoop ***?

[MAVrecK]

A whole night at my girlfriends.... and no answer? No one knows? No intellectual guru answer?

[Un4given]

This has actually been covered a number of times.

The memory runs so much faster because the memory timings are much higher than used on a PC. You might be surprised at how high the latency settings are on a video card. However, this effects a video card much less than system memory and also has to do with why the memory can run so much quicker.

1. Traces between the VPU/GPU and memory on a video card are much shorter, and the memory is directly attached to the PCB. The traces on a motherboard are much longer and the memory is attached to a PCB that is socketed. This increases signaling and ground bouncing problems.

2. Memory reads from video memory are very predictable and nowhere near as random as system memory accesses.

Video processors don't run anywhere near the speed of CPUs because of two main factors.

1. They have substantially more transistors than a CPU. An AMD Athlon XP w/512K cache only has about 1/3 the number of transistors, and a P4 w/512K cache has less than 1/2 the number of transistors as the ATi Radeon 9xxx and GFFX 5xxx series card.

2. Due to the very quick update time in these chipsets the designers go more parallel in design, rather than longer development times where more optimized designs can be handled.

[MAVrecK]

thanks for the informative response