The AD9910's DRG is capable of generating a frequency, phase, or amplitude ramp. I assume you are interested in an amplitude ramp.
Yes, the AD9910 can generate an amplitude ramp with full 14-bit resolution. In fact, the AD9910 offers independent control the amplitude step size and step rate. There should be no problem producing a 100kHz ramp waveform.
The RAM is only 1024 words deep, so using RAM to generate the ramp is probably not a good fit for your application.