Need help - need a keyboard with REAL rollover (REAL anti-ghosting), please recommend me a keyboard

[konopes]

hey guys (and girls) I am looking for a keyboard (the cheaper the better) which would allow me to press 4 keys at the same time

I can´t press up, left and then space, it just does not take space
also I need it in combination with left CTRL

I already tried 2 gaming keyboards, they were supposed to be anti-ghosting, one of them with 10 key rollover, but still...

any tips? I don´t want to spend 80-200 euros for a mechanical keyboard unless absolutely necessary

 

[Calculagator]

If the keyboard with 10 key rollover did not work, I would think the problem is not with the keyboard.
Do you have a PS/2 port on your motherboard that you are using for they keyboard? Are you using a KVM switch or adapter? Most (all?) USB keyboards are not able to support rollover without a special driver.

 

[konopes]

I do have the PS2 port, the 10 key rollover keyboard is plugged in to the PS2 port

I dunno what the KVM switch or adapter is.