Your graphics card is fine.
We didn't know if it was the original card that came with your XP computer or not, which is why we asked about it.
If you have a non-SSD drive in your system, it will slow down your boot. Boot time is extremely fast if you only have SSD. It might be better to use a USB external drive to store files, and only connect it as needed after the computer has booted.
You could ask about putting your old drive in a USB external hard drive case, so you could attach it as needed.
Of course if you're hoping to have a dual boot, you'd want the XP drive to be internal. There are XP drivers for your motherboard (ASUS SABERTOOTH 990FXR2.0) so XP should work.
http://www.asus.com/Motherboards/SABERTOOTH_990FX_R20/HelpDesk_Download/I don't know how many files you normally save on your hard drive, or whether you archive most of your files on an external drive. The 250GB SSD may be fine for your use -- especially if you use an external drive for storage. It all depends on how much space you use.