windows vista not booting is it my GFX ?

[Tabby]

well i got up this morning and well i turn on my computer and i got a boot error and it didn't boot i try 4 times. so i went in my computer and wiggle the IDE the GFX and the CD and the 24 pin ATX power cord to the mobo and it boot!! now i did that because the only reason im useing vista is cuz i got an NTLDR error and my bro sead my HD was corrupted and format my drive and lost all my data!!! errr so now i got vista and well i got a boot error. i had a similar error 3~4 times in XP but wen i wiggle the GFX CD IDE ATX Power it boots fine. i think its the GFX or the ATX power but i think its the ATX power because with my PSU its really hard to get in the 24 pin slot that i need a flat head screwdriver to get it in.

oh and the power cord to the GFX is close to the ATX power cord so i need to find out which one it is.

PS hi all this is my first post ......help me