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I have the XFX HD 6670 (800 Mhz CPU, 800 MHz mem)

I've tried using RBE.

It appears that the HD 6670 is -unlike the rest of the 6xxx series- not supported by RBE. This is apparently due to BIOS signature enforcement of some kind. I can only guess there is some type of hash and if you modify the bios with third party software, that hash is modified and the card won't boot into windows.

I have the HD 6670 DDR3 version. I know that it is stable at 850 MHz for GPU and 975 MHz for the memory. However, the overdrive software does not work well with the card and causes random crashes.

I know this to be the case because ANY overclocking of the memory through overdrive causes Crysis 3 to eventually freeze (specifically 900 MHz to the memory). Yet, if I flash the XFX BIOS to the ASUS HD 6670 (900 MHz memory) the card is completely stable and does not crash in Crysis 3 at all. In fact, the ASUS BIOS is MORE stable than the XFX one (despite having higher clocked memory).

Anyone have any experience with this?

The purpose is both idle curiosity and also to squeeze the best performance out of a card for an older system that belongs to a friend who cannot afford to buy a lot of new equipment and only plays games moderately.
    
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CPUMotherboardGraphicsRAM
Zilog Z80 @ 4MHz Coleco Adam Motherboard 16 KB / 16 colors / 32 sprites (on-board) 64K 
Hard DriveOptical DriveOSMonitor
Coleco Digital Data Cassette Coleco Digital Data Cassette CP/M, BASIC (on tape) CRT Television 
PowerCase
Built into printer Plays All Coleco Cartridges 
  hide details  
Reply