Such cables rarely work. The one from DVI to VGA uses DVI-I, which is a total of the analog part in the form of pins that you want to cut.
The cable from HDMI to VGA, unless it has a built-in converter, also has no right to work.
If you want to connect a DSUB monitor to your card, it is wise to buy a grommet for 20 zlotys - they usually work:
Added after 38 [seconds]: dames wrote:
Which adapter will be better?
Cheaper - with HDMI.