Another thing to be aware of is there are loads of counterfeit cards kicking about (some managed to find there way into reputable shops and online distributers) and definitely do NOT do what they say on the tin.
Even at the outside, the max file size for RAW is going to be about 4-6MB and 12 secs write time is VERY slow.
Taking a look at Jessops website, the
Ultra II 512MB SD card has a write rate of 9MB/sec.