to upgrade the 2x9800gx2 or not to upgrade, that is the question also random crashes

[Diakatarnis]

Ok so i have 2x 9800gx2's running. ive just got my hands on the new nvidia drivers which allow me to use my dual screen with sli turned on "great" i think.

Then i start getting random crashes .... so i decided to downclock the cpu from 4ghz to 3.4 it was running resonably toasty.

so the crashing stops (or so it seemed) then i play 2 hours of css sucking as usual. alls well im running quad sli and no crashes woop. Then i open a pdf with a diagram on it BAM second screen goes crazy split images and pc freezes just freezes. ....

so hmm then i leave pc on load over night to test, come down the pretty fish screensaver is still going quite nicely. open up a couple of web pages all fine, run vent then BAM again pretty screen and another freeze :\

Now im not even sure if its the sli cos i do have random crashes now and again for no reason. but its the ones where it just freezes so i dont get any errors or anything, the mosttt annoying type of crash.

So im thinking of just swapping out the gfx cards for some new ones.

Any idea how much performance boost / fall ill get if i just get a single GTX 295?

or any suggestions on whats causing the crashes?

running QX6850 @1500fsb 3.38 Ghz
EVGA 790 Ultra SLi
corsair XMS 3 ram @ 1600 (factory default)
about 5 hdd's some 1tb's
Vista 64 Ultimate
OS is installed on a raptor
Asus Xonar X2D pcie model

 

[Diakatarnis]

newest nvidia release of the drivers, also installed another 4gb of ram about 2 days ago, but not sure if thats had n e effect either....

I'll run memtest in a bit, which version ofmemtest works best? the memtest+ or normal? or is there a new fangled memtest that works even bettter.?

 

[Diakatarnis]

ok so memtest cane back clean ...

i uninstalled all nvidia driver then driver cleaned the beast thenn put the drivers back on again.

Played godfater 2 for about 2 hours then BAM another freeze :\

im going to try witout sli switched on see if i have any more luck

its problems like this that make me get so fedup i end up buying all new parts again :|