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7970 Extended Desktop Bug

J

jrcbandit

n00b
Joined
Oct 31, 2011
Messages
31
Has anyone else experienced a bug where the memory is never clocked down when using the extended desktop? Everything is fine with my 7970 when I utilize a single monitor. However, when I add a 2nd monitor and choose to extend the desktop, the memory stays at its max rate all the time and never down-clocks. I am using Afterburner to slightly raise the voltage, to utilize a manual fan profile, and to overclock the memory past the point of AMD overdrive. If I don't use Afterburner to overclock or disable Afterburner, the memory and GPU correctly downclock but when I go to play a game, they never increase!
 
This isn't a bug. Downclocked GDDR5 cannot support multiple monitors. Originally, the Cypress (58xx) cards did downclock in extended monitor mode but they also flickered a ton. The solution was to run the GDDR5 at 3D clocks if multiple monitors are connected. This also affects NVIDIA cards.
 
dook43 said:
This isn't a bug. Downclocked GDDR5 cannot support multiple monitors. Originally, the Cypress (58xx) cards did downclock in extended monitor mode but they also flickered a ton. The solution was to run the GDDR5 at 3D clocks if multiple monitors are connected. This also affects NVIDIA cards.
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Ah thanks for the info! I was wondering why my idle temperature was 8-9 degrees higher than normal and it was due to the memory not downclocking. So if I want to use extended dekstop, I just have to deal with the increased power consumption/temperatures.
 
Yeah, it's kinda funny. The whiners would whine when the screen was flickering, then they whined after the card started running hotter and consuming more power. Nvidia's GTX 280 and 480 originally just kept the core (AND MEMORY) at 3d clocks when multiple monitors were connected, and that seems ok to the fangirls.
 
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