|"Althought i cant understand everything you said(im not British or American and my english aint that good)."|
What you've written is better than for many people who start a Topic (a.k.a. Discussion) here whose first language is English !
Use a free online translator if you need to.
Geforce 9600 GT
There are two versions of the 9600 GT video chipset
- the original one - draws 96 watts
Minimum System Power Requirement (W) - 400 W
Supplementary Power Connectors - 6-pin
If your video card has a 6 pin power socket on
it, it has the original version
- the later version - draws 59 watts
Minimum System Power Requirement (W) - 300 W
Supplementary Power Connectors - (none)
You probably don't have the newer version.
Your present power supply - 405 watts - is just barely adequate if it is a decent power supply, but if it's an el-cheapo power supply, it's likely it can't actually handle the extra load of the video chipset properly.
"....i've already ordered a new PSU Corsair 600w GS(its made for gaming usage or thats what they say)."
That's a decent brand. When it's designed for gaming, the wattage rating is probably for continuous use rather than intermittent use, and the efficiency of the power supply may be as high as 85%.
This is what I usually supply....
Don't buy an el-cheapo (in quality) PS.
See response 3 in this:
I no longer recommend Cooler Master, AOpen, or Sparkle power supplies.
I'm now downgrading Thermaltake to middle of the road.
Antec has two lines of PSs - the better line has a longer warranty for the same or similar capacity - the other line is more towards middle of the road.
AMD has a list of Certified (tested and found to be good quality) PSs: