How can i get my amd fx-8120 to 4.2ghz

[JAYFRESH1271]

I need help getting my fx-8120 to 4.2ghz right now i have it at 4.1ghz just on multiplyer raise n a few things disable in Bios but when i try to bring it up to 4.2ghz on multiplyer my system sometimes freeze n on prime95 blend test one of my cores stops on 4.1ghz i have it stable for 4hours on prime95 blend test with a temp of 56c the highest i got here are my specs can someone help pls



Gigabyte 990FXA-UD3 AMD 990FX AM3+ Motherboard, AMD FX-8120 X8 3100MHZ 16MB 125W AM3+, Sony Optiarc 24X DVDRW SATA OEM, WD Caviar Blue 1TB SATA HD 7200/32MB/SATA-6G, Corsair Vengeance LP 8GB PC12800 DDR3 1600MHz 2x4, Thermaltake Overseer RX-I Full Tower Gaming Case, EVGA GeForce GTX 550 Ti 1GB GDDR5 PCIe 2.0, Noctua NH-D14 CPU Cooler for i5, i7, 775 and AMD, COOLMAX ZP-750B APFC/V2.3/EPS12V/V2.92 80+ BRONZE

 

[henydiah]

sure the coolmax 750W health ? and enough voltage CPU / vcore

 

[JAYFRESH1271]

how i got it up to 4.1ghz on just multiplier but when i try to get it to 4.2ghz on multiplier n i run prime95 blend test one of my cores stops or my pc freezes on 4.1ghz i do not have that problem n i ran prime95 for 4 hours n no problem

 

[catshannon]

Try updating your BIOS I've had an 8120 on stable 4.2 stock volts before.

 

[catshannon]

http://www.tomshardware.co.uk/forum/273222-11-overclocking-asus-990fx-sabertooth Similar mobo performance if not yours is better, you may find this helpful.

 

[JAYFRESH1271]

i try updating my Bios n when i run prime95 one of my cores stops working n gets a error i guess i have to use voltage or fsb which i never done before