The efficiency of faster than symbol rate sampled MMSE equalizers, which is generally considered as a remedy to time or phase errors, is explicitly analyzed accounting for practical channel conditions and pulse shaping filter. The simulation results illustrate that the advantage of faster than symbol rate sampling is always present for the finite block length ISI channel even if perfect time information is available. Block length is the key parameter that affects the performance such that there is a high SNR improvement with smaller block lengths in comparison to the conventional symbol rate sampled MMSE equalizers. Other parameters such as excess bandwidth and power delay profile have influence on the performance of faster than symbol rate sampled MMSE equalizers.