My 4850 only works with catalyst 8.7

[CaMpeRuS]

Hi all, i have a problem when i try to update my drivers. Uninstall and using driver cleaner dont solve it. When new drivers installed (8.8, 8.9 or new 8.1) windows dont start and give me a black screen before desktop screen so i have to rollback to 8.7 uninstalling the new ones in windows secure mode.
Can it fail due to bios modification? I flashed it and works fine in 8.7, all works fine... Anyone have the same problem? Thank u and sorry for my english.

 

[mullered07]

have you modded the bios ?

edit nm, i see you have this is a common problem with modded 4850s with a bios mod, there is a beta of 8.11 on here somewhere, you could maybe see if they work ?

 

[CaMpeRuS]

Yes, now is 700/1100 totally stable in catalyst 8.7(crysis, cod4, hl2, stalker, warhead... hours played without any problem, but updating driver give me black screen before desktop starts

Edit: mmm if its a common problem i try these drivers and i hope in a future to new drivers support modiified bios.

Thank you!

 

[Fastmix]

Usually that happens if you have modded the CCC limits on your bios.

Try reflashing your card with a different bios, it should solve the problem.

 

[CaMpeRuS]

I only change clocks and voltaje.

 

[GenTarkin]

this happened to me as well.
In my case it was because of only modded clocks and voltages in my custom BIOS.
The fix was when I downloaded newest RBE and opened up my stock BIOS again. In the new RBE it showed the "tables" of voltage selections for each clock speed. I remember that the voltage I manually typed before the new version matched none of those in the table, so I used only the ones in the table. I was also sure to only change the fields I desired rather than changing some of the ones I wasnt sure of.
Since, I reflashed my card with that, I no longer had the problem of video dissappearing when booting up to windows desktop with any catalyst over 8.7
Give it a shot!

 

[CaMpeRuS]

umm, i will try with new rbm and table voltajes. I hope i will resolve it . Thank u!

 

[GenTarkin]

did this resolve the problem for ya? =)