[Discuss-gnuradio] Rx overflow problem related with sample rate

Hi,

I'm using USRP N210 with CBX daughter board on native Ubuntu 14.04

When I open fft_uhd with sample rate about 25 MSps, it spits out of "D"(overfow)

As I know, USRP N210 support sample rate up to 25 MSps and it's possible on Tx mode.

I think my PC can handle this sample rate, but I don't know why this is happened.

How can I handle this problem ? 

Thanks.