The motherboard spec states that the AGP (video card) slot is AGP-4x, which is a 1.5 volt standard.
Your old card is a dual voltage AGP-2x card which will work on either 3.3 volt or 1.5 volt slots.
Your new card looks like an AGP-4x card which should work OK.
You have not answered my question about beeps at startup.
Normally, PCs emit one beep from the internal loudspeaker at boot time. If something is wrong, they can often signal this with a pattern of multiple beeps.
A PC which previously used to beep once, but now beeps three times (for example) and then goes dead, is trying to tell you something.
So is a PC which used to beep once, but now is completely silent.
So, how about it?