I've never heard of a cable simulating a signal. As long as the av out on the hardware is capable of outputting rgb, it should be true RGB with a scart cable. Do the cable listings on eBay mention that they are only simulating rgb? Also, which rgb monitor are you using? I haven't been able to find anything bigger than 13" near me:(
I'm not using an RGB monitor, I just use a scaler.
the listing said that it didn't put out RGB, only composite. >>>
http://www.ebay.com/itm/S...0&hash=item3a91d9b0d1