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Dear Valued Customer,
Thank you for contacting ASUS Customer Service.
My name is Fiona and it's my pleasure to help you with your problem.
I am afraid to say FX 8350, 8320 couldn't support the M5A97 EVO, M5A99X EVO, or the Sabertooth 990FX motherboard.
To get support for the 2nd generation FX CPU's, you must purchase a R2.0 version board.
My concern would be the power draw of the Vishera on your motherboard which only has a 4+1 power phase. If the new chips are not much better than the Bulldozers with regard to power draw and heat production it probably will not overclock high on that board.
I just had a look online to see if my MOBO would support Vishera...
What i found was not good
http://www.overclock.net/t/1035333/official-asus-sabertooth-990fx-owners-club/3180#post_18436964
I hope thats wrong!!!!!
New for your Sabertooth. They have n0t updated the actual supported cpus page but similar just released by date is used for FX-8350 and CHV.
BIOS (10)
Version 1604
Description SABERTOOTH 990FX BIOS 1604
1.Improve system stability.
2.Support new CPUs. Please refer to our website at: http://support.asus.com/cpusupport/cpusupport.aspx?SLanguage=en-us
File Size
2,35 (MBytes) 2012.10.24 update
Download from
Global (DLM) Global
I just had a look online to see if my MOBO would support Vishera...
What i found was not good
http://www.overclock.net/t/1035333/official-asus-sabertooth-990fx-owners-club/3180#post_18436964
I hope thats wrong!!!!!