rnavarro
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Sapphire Radeon X1900 XT, memory refresh from BIOS issue? - 2008/05/18 19:02
Hi, I have a Sapphire Radeon X1900 XT 512MB which I am having problems with. While using it, I see artifacts from the very moment I turn the computer on. Playing is impossible because even if you can stand the artifacts, the computer usually freezes after 10 minutes. However, doing some test with ATITool without the Catalyst drivers installed I managed to remove all artifacts by changing the memory refresh rate to 0xA. If the drivers are installed, they don't seem to let me change the memory refresh rate, so what I did was uninstall the drivers, set the frequency of the card from 500/600MHz to 625/774MHz manually with ATITool, and then change the memory refresh rate to 0xA, moment in which all artifacts are completely gone.
Still, I simply cannot play this way, as it only works if drivers are not installed, so I wanted to change the memory refresh rate of the card in the BIOS using RaBiT, flash it, and get it working, but sadly, RaBiT will not let me change the memory refresh rate. I can change the bar, yes, but when I save the file with the desired memory refresh value, and then open it again, the memory refresh is back to default vaue of 0x1D. In fact, absolutely every other change that I do is saved, the clocks, all other memory latencies but for the only one I desperately need it doesn't.
So, in short, what I need is a way to make RaBiT save the modified memory refresh value correctly, or to find a Sapphire Radeon X1900 XT 512MB version BIOS of a card that has Samsung 1.1ns memory that has a memory refresh rate of 0xA instead of the default 0x1D. Thanks for your help... 
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