Ha ha , i am a Coolviva user .... and i had my X1300 450GHz core Oc to 702MHz ... thats proof that Cool Viva is good in some how ....

Anyway , one thing about Cool Viva is that the Heat disipation area is not so big compare to its volume of Material ... Haha ... Thats means it take in heat fast fsat from the GPU but had a longer time to dissipate it away ... Anyway , not too Hot for normal OC ussage ... Recomended for Low Level GC only ... Now i am going for EVERCOOL TURBO2 to OC my new X1600 GC ..