I am receiving garbled text on the desktop (using Windows 95) after installing a voodoo rush card (latest drivers). I have read that this is a common occurrence:

"The AT25 is clocked at 72 MHz and memory cannot keep up with it, creating artifacts on the desktop (!). Settings frequency one or two MHz lower solves it."

Source: http://vintage3d.org/3dfx2.php

However, I am not sure how to change the frequency. Another blog post appears to shed more light:

"If you experience garbled text in Windows mode after installation of the new (i.e. some recent) 3dfx reference drivers, it seems like they overclock your board as well... check the MCLK_Frequency setting in the promotn.inf resp. in the registry. Current 3dfx reference drivers use to set 72; start tuning around 55 should fix it, 60 works for my Biostar Rush."

Source: https://groups.google.com/forum/?fromgroups#! … 0XhUU%5B1-25%5D

Unfortunately, I cannot find promotn.inf in the registry. Can anyone please help? Thanks for your time.