XFX R7850 Ultra OC 1GB Overclocking Help Please

FPSmadMEDIC

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Aug 23, 2013
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http://products.xfxforce.com/en-us/Graphics_Cards/AMD_Radeon%E2%84%A2_HD_7850/FX-785A-ZNBR
I have been using MSI Afterburner to OC the card, so far I have achieved 1050 core, 1250 mem, w/20% power slider up and no voltage changes. When I hit 1300 on the mem the card crashes, do I need to bump the voltage at this point or just leave it. Since the 13.4 AMD CCC Update the voltage control had gone away so I will need an external program to control the voltage so any suggestions there would be helpful too.
Current System:
CPU: Phenom II x6 1065T w/Cooler Master Hyper TX3 with 2 fans
RAM:16GB 1333 G.Skill RipJaws
GPU:XFX Radeon R7850 Ultra OC Edition 1GB w/ARCTIC Accelero TT II VGA Cooler
MOBO:MSI NF750-G55
PSU:Cool Power Gamer Pro CP-GP775 775W
CASE:Antec 300 3x120mm intake fans 2 on front one on door over gpu, 1x120mm exhaust back, 1x140mm exhaust top so I have zero cooling issues with the cpu staying under 35c under load and gpu 55c under load on a 80f+ day inside
 

FPSmadMEDIC

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Aug 23, 2013
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I can't with MSI Afterburner. Sorry I should of added in that with the CCC 13.4 update the ability to go over 1050 on the core went away too. My voltage is currently reporting in at 1.138v under load.
 

FPSmadMEDIC

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Aug 23, 2013
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Ya I have seen em that high as well. And my stock clocks are 975 Core and 1200 Mem, I don't have the 2GB DD Black Edition