780m vs 880m

[DcUlreich]

Clearly 880m is better than 780m but when I look at the specs, I see that 880m only have 64GB bandwidht!! vs 780m's 160GB bandwidth and memory inteface width 128 bit vs 780m's 256 bit.

can anyone explain why?
http://www.geforce.com/hardware/notebook-gpus/geforce-gtx-780m/specifications

http://www.geforce.com/hardware/notebook-gpus/geforce-gtx-880m/specifications

 

[Spectre694]

It is the architecture of the chip that really matters comparing memory bandwidth, core count etc. only matters if the chips are designed the same.

 

[Kandiimann Shane]

It is the architecture of the chip that really matters comparing memory bandwidth, core count etc. only matters if the chips are designed the same.

I have also been debating the significance of this. I am getting a laptop for adobe after effects. Someone told me "Maybe memory bandwidth is not an important specification for gaming but it sure is for Adobe MPE based CUDA operations. I recently have run over 50 tests of MPE acceleration on a whole series of GPU's and a bunch of them included overclocking the GPU memory."

The laptop i really really want to get comes with the 880m. do you think i should be concerned, or will it not make a significantly noticeable difference?

 

[Spectre694]

It is the architecture of the chip that really matters comparing memory bandwidth, core count etc. only matters if the chips are designed the same.

I have also been debating the significance of this. I am getting a laptop for adobe after effects. Someone told me "Maybe memory bandwidth is not an important specification for gaming but it sure is for Adobe MPE based CUDA operations. I recently have run over 50 tests of MPE acceleration on a whole series of GPU's and a bunch of them included overclocking the GPU memory."

The laptop i really really want to get comes with the 880m. do you think i should be concerned, or will it not make a significantly noticeable difference?

I doubt you will see a difference the CUDA performance has only increased each generation since the 600 series. I can't say for sure because I haven't used MPE but if I were to guess it would not be a huge difference.