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sapphire radeon X800 GTO^2 problem

Joined
Oct 26, 2005
Messages
656 (0.10/day)
Location
Madrid, Spain
System Name Sample light
Processor AMD Phenom II 965
Motherboard MSI DKA790GX
Cooling Zalman 9500LED
Memory 2x 2GB G-skill PC8500
Video Card(s) Asus built AMD/ATI HD4850
Storage 500GB Wesern Digital green
Display(s) too ashamed to tell, but its an acer
Case Lian Li V2000
Audio Device(s) Echo Audiofire 2
Power Supply Corsair VX550
Software Windows XP pro SP3
hello

i have a slight problem with my sapphire X800 GTO^2,

i´ve always had a problem when passing 540mhz memory frequency, no problem, i thought i had 2.0ns like some of the GTO^2 on the market,

when pushing beyond that value and and run the artifact tester on ATItools, the machine would reboot after a couple of minutes of testing,

the issue rose when a couple of days ago, i replaced the stock cooler with a zalman VF700-AlCu, on noise issues, when i pull off the stock cooler, 1.6ns memory chips,

whats going on here ? heat problems ? voltage problems ?

any suggestions ?

another issue i´ve noticed, the memory chips on the back are only cooled by a patetic strip of aluminium which is actually used to keep that cooler in place, the VF700 came with individual aluminium memory heat sinks, i have´nt had the time to test how far the memory would go on those heatsinks, i wonder if those chips on the back of the card would be the problem.
 
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