Originally Posted by shinji2k
The Dynex 700W is more like a mediocre 550W PSU. They are overpriced junk and it sucks that you've got one. That said it should be able to run a 9800gtx no problem. Even if a rail was actually set to 18A (which I can almost guarantee it isn't) the 9800gtx will not draw more than 130W (~12A) so it would not have a problem on an 18A rail.
When you say crash, what do you mean? If the computer just shuts off then the PSU may be the problem, but if the game crashes it is either a driver problem or a corrupted game install.
I might be wrong here but all the research I find on this is that you have to have 24amps on the 12v rail to run a 9800gtx. And all information on that rocketfish powersupply that i find says the rails are as follows:
By the way that one that has glare on it is another 18.