Originally Posted by chad110
oh wait you mean the fan for the hsf or case fan? i noticed that when i move the cover of my case and accidentally hitting the cable which connects to the case fans, the leds are blinking..
ive tried changing hdd, still freezing.. so hdd is clear...
by the time the 7870 arrives i'll monitor and observe it.. and probably get a new psu, is 650w ok ? i think i'll be getting corsair or thermaltake..
and i'll check the bios too..
one thing , before this problem occured, i have this deep cool hsf fan, and noticed that it cracked then i change it to stock fan.. after changing it back, the freezing/lock up started..
No I mean the fan that is on the actual graphics card...or is your GTX 450 passively cooled? That could be your main issue. By running something like Saints Row 4 you are beating the GPU really good. That GPU wasn't really meant for this heavy of a load, but if it is actually doing it I wouldn't be surprised if it is over heating.
If your current PSU is working normally...it should be fine for a 7870. You need to pay attention to the +12v rail amps (sticker on the side of the PSU). Your PSU has four 20 amp rails I believe. It will be running your PSU at close to max...though that is when a PSU is the most efficient. If you have the budget for a new PSU...I'd try to get one that has at least 30 amps on a +12 volt rail to be safe...but that is allowing for overkill.
You got to be careful with PSU purchases. You will see some 600+ watt PSUs that will have really weak +12v rails and then run like 50 amps on the +3.3v rail...and most PC will only use like 10 amps or less off this rail. Your current PSU is one of the better ones. I'd give it a try honestly. It is beefy enough that it isn't going to explode in a ball of fire and take your new GPU with it...provided it is working right.