What is the difference between the memory interface, and memory size for graphics cards?

Question

Just curious.

Answer 1

Memory interface is measured in bits (like 64,128, 256) and higher number indicates fater (sometimes much faster) performance.

Memory size is measured nowadays in megabytes (also 64, 128, 256...) and has little effect on performance. However, many games have certain requirements for the memory size and wouldn't run if it's less.

Answer 2

i think of this is appropriate to describe this in an user-friendly way. the wider the reminiscence bus, the better the GB/s throughput. comparable is going for gadget ram, seem at till now, AMD socket 754, has single channel ram (64bit huge), this is provided in, in thought, @ 3200MB/s. Then got here socket 939 alongside with twin channel (128 bit), ensuing in thought into 6400MB/s the rationalization why the fee distinction between those issues in videocards isn't by way of extra throughput, yet because of the fact the cardboard many times desires extra layers of pcb to get this working basically advantageous, and extra layers of pcb leads to larger cost. I recommend, this is not comparable to they pull slightly change someplace on the cardboard and say, now this is 128 bit and now this is 256bit. on the exterior the enjoying cards could seem the comparable, yet case in point a card this is conscious of the two, the ATI 9800. the 128bit and 256bit version could seem the comparable, yet on the interior, they're relatively distinctive. And that the throughput is larger, which will certainly help the fee bypass up, because of the fact it is likewise a advertising and marketing difficulty, extra suitable is often extra effective interior the eyes of the unknowing shopper.