yes it had old data anyway ill see through it but its a misconception when people say that adding ide drive will slow down the overall performance of pc?
and second thing installing games on ide will it have any effect than on sata?i mean games will run better on sata drive or will it be same?
Yes, installing apps on the IDE drive will slow things down overall. The issue is in accessing the slower device.
That is why I would recommend you only store files on the IDE HDD and install apps on the faster SATA drive(s).