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Athlon x4 635 OC issues

post #1 of 3
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I was gifted some memory the other day (memtest ran ok) and in order to get that memory to run at it's rating on my AMD board. I was told (via the company's forums) that I needed to basically raise the bus freq which in tun, is going to overclock my CPU. I was always interested in OCing my CPU so no biggie there (really gave me the nudge I needed), but I have been fiddling with it all night and I can't get this sucker to run more than ten minutes in prime95 before my computer just reboots itself ( prime95 error log: FATAL ERROR: Rounding was 0.5, expected less than 0.4, Hardware failure detected, consult stress.txt file.)

So, I'm stopping here to see what you guys can offer me as far as advice. Below is what I have and what is set to what. Have at it:

Board: ASUS M4A79XTD EVO

RAM: Ripjaws X Series 8GB (2 x 4GB) DDR3 1600 F3-12800CL9D-8GBXL


Settings (if not listed is set to auto or default):

Bus Frequency: 240 14.5

Voltage: between 1.4 to 1.45

DRAM Frequency: Originally set at DDR3-1333 (Bus at 240 brings it to 1600)

RAM Timings: tCL 9 - tRCD 9 - tRP 9 - tRAS 24 and Voltage to 1.50V (what the memory is rated for)
    
CPUMotherboardGraphicsRAM
i7 2600k OC'd at 4.5ghz Asrock extreme4 gen3 EVGA Nvidia Geforce 670 FTW Samsung 3nm 8GB DDR3-1600 OC'ed at 9-9-9-24 
Hard DriveOptical DriveCoolingOS
Sandisk Extreme 120 SSD ASUS DRW-24B1ST/BLK/B/AS Black SATA 24X DVD Burner Coolmaster Hyper 212 Windows 7 Ultimate 64 
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Optoma HD33 1080p 3D Projector Logitech Wireless Corsair Enthusiasts TX750  NXZT Gamma Classic Black 
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CPUMotherboardGraphicsRAM
i7 2600k OC'd at 4.5ghz Asrock extreme4 gen3 EVGA Nvidia Geforce 670 FTW Samsung 3nm 8GB DDR3-1600 OC'ed at 9-9-9-24 
Hard DriveOptical DriveCoolingOS
Sandisk Extreme 120 SSD ASUS DRW-24B1ST/BLK/B/AS Black SATA 24X DVD Burner Coolmaster Hyper 212 Windows 7 Ultimate 64 
MonitorKeyboardPowerCase
Optoma HD33 1080p 3D Projector Logitech Wireless Corsair Enthusiasts TX750  NXZT Gamma Classic Black 
MouseMouse Pad
Logitech Wireless N/A 
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post #2 of 3
You will likely need to lower the RAM divider to 1066 or even 800 first (keeping the 9-9-9 timings). If you can eventually get it to run at 1600 or more that's great, but AM3 is only rated to 1333.

Read and print out the pdf in my signature, as it explains well how to overclock an AM3 platform, using multipliers and HT bus frequency.

I have an Athlon II 620 overclocked to 3.45GHZ on 1.47v on the same mobo as you. Yours should do better as it's a better revision chip.

Edited by damric - 4/13/11 at 9:58pm
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Light Gamer #1
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Light Gamer #2
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CPUMotherboardGraphicsGraphics
i3-6100 ASRock Fatal1ty Z170 Gaming K4/D3 MSI r7850 TFIII OC MSI r7850 TFIII OC 
RAMHard DriveCoolingOS
G,Skill TridentX OCZ Vector 150 TPC-612 Windows 10 
KeyboardPowerCaseMouse
G105 Rosewill Capstone 550M HAF XB M570 
CPUMotherboardGraphicsRAM
Athlon 860K MSI A88X-G45 MSI GTX 460 G.Skill RipjawsZ 
Hard DriveCoolingOSKeyboard
PNY Optima Hyper T4 Windows 10 Devastator 2 
PowerCase
Rosewill Valens DIYPC Ranger-R4-R 
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post #3 of 3
The RAM might hold you back from proper bus clock based OC due to being a generic speed/timings
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