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Overclocking AMD Phenom II x4 820

post #1 of 27
Thread Starter 
Hi there, I am a new member to overclock.net and I am having issues overclocking my CPU.
My current specs are....
-MSI 890fxa-gd65
http://www.newegg.com/Product/Product.aspx?Item=N82E16813130565
-G.SKILL Ripjaws X Series 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800)
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231445
-COOLER MASTER Hyper 212 Plus
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103065
-AMD Phenom II X4 820 Deneb 2.8GHz Socket AM3 95W Quad-Core Processor
http://www.newegg.com/Product/Product.aspx?Item=N82E16819103824
-KINGWIN 850W ATX PSU
http://www.newegg.com/Product/Product.aspx?Item=N82E16817121069
-Antec Three Hundred Illusion Black Steel ATX Mid Tower Computer Case http://www.newegg.com/Product/Product.aspx?Item=N82E16811129066

I also have 2 1TB internal HDD and a DVD burner. Didn't think these were important to look up.

I am currently overclocked to an unstable 3.4 GHz. Only unstable after 30 min of Prime95 or 4 hours of FPS game play. I have heard that I should be able to overclock my CPU to a possible 3.8GHz, but I know 3.6GHz has been achieved for sure. I have the multiplier maxed at x14 and the system is 100% stable before I start to mess with the FSB. I increased the FSB to 243 which bring it to 3.4GHz. I kept the ram down to approximately its normal speed by reducing its multiplier. I did the same to the Hyper Transport Bus. I increased the CPU voltage to 1.395. I bought the new CPU cooler to keep the temps down if that was the issue, but my CPU is not overclocking any more. Temps are down to 25C-28C basically idle and no more than 42C when running prime95. Any suggestions would be appreciated! I have little to no experience when it comes to overclocking. I just started last month.
post #2 of 27
More Vcore. I need 1.4-ish at around 3.4 - 3.6ghz on my PII 720. I would bump to about 1.45v core and prime it again. If that fails, I would try to bump your North-bridge voltage a little bit and go form there.

Remember, not all chips are equal. And btw, if you have a C2 stepping I wouldn't expect anything past 3.6ghz. C2's are notorious for hitting the wall at around 3.6ghz.
post #3 of 27
Thread Starter 
Just attempted 3.5GHz overclock after upping CPU voltage to 3.46. Jumps from 1.46 to 1.63 so I thought I would be safer with the lower voltage. Prime failed after 30 seconds and restarted computer. I kept CPU voltage there and set North-Bridge voltage to 1.3v. Ran Prime95 and restarts after 30 seconds still. Going to play with numbers, but just thought I would report in for update. Any feedback would be appreciated. CPU temps not getting above 38C.
post #4 of 27
Thread Starter 
Apparently on the North-Bridge, 1.3 is too high and 1.197 is too low. Still only getting about 30 seconds into Prime95 and temps still aren't going over 38C.

1.21v on the NB causes restart as well. BIOS allows me to adjust CPU, CPU-NB and NB. Not exactly sure what CPU-NB is. Any ideas? Getting 124 BSOD every time.

Is forcing restart better than actually giving me BSOD?
Edited by grubby99 - 5/3/12 at 7:49pm
post #5 of 27
CPU-NB is the memory control voltage. The same rules apply for that, just like the CPU voltage. 1.55v is consider the MAX from AMD. Usually you only need to play with that with memory overclocking and NB frequency overclocking.

- Have you updated any drivers lately?
- What speed is your ram running at?
- Have you tried running with the lower possible multiplier to rule that out? // Ram multiplier, not CPU.
- What speed is your HT link and NB Frequency running at?
post #6 of 27
Thread Starter 
All drivers are up to date, ram is @ 1667, have not tried lower multiplier, HT and NB are manually set at 2000. Anything over 2000 for those gets me a BSOD. Memory BSOD 50 and an f4 and f7 BSOD are what I have received so far playing with settings. I have just managed to run Prime95 with NB set @ 1.25v. Error after first test, but only on one core. Said "Rounding was 0.5, expected less than 0.4 Hardware failure detected". Not sure what causes this or what it means, but it only happened on one core. 4 tests completed before computer restart. Lasted a total of about 5 minutes. Going to up the voltage more tomorrow. Wifey watching Monk from computer now and I am sure she doesn't want to see BSOD repeatedly lol. Appreciate the help by the way. Any more tips would be appreciated!
post #7 of 27
Anything over 2000 = BSOD? I would say your CPU-NB needs a little more voltage then, or possibly lower the NB frequency and see if it helps.

Have you tried running memtest just to make sure the ram is all good?

With the BSOD's:

From what I gather the F4 BSOD is pointing me toward OS corruption or a failing HDD. I would run check disk or something similar to make sure. See THIS also.

For the F7 see THIS
post #8 of 27
Thread Starter 
Memtest and checkdisk came back with no errors. No longer receiving F4 and F7 errors. Just received both once when adjusting settings in BIOS. Leaving NB and HT at 2000 seems to be the safest so I have not adjusted either except to keep them there. Currently CPU voltage is set at 1.5v. What is max recommended voltage? I am finding posts of people overclocking to 3.5GHz with no issues whatsoever. Some even getting to 3.8GHz. I cannot seem to get stable at 3.5GHz frown.gif Should I take CPU voltage higher? Repeatedly receiving BSOD #124 which deals with voltage. I know it means add more voltage, but I have heard it could also mean drop the voltage. Any thoughts?
post #9 of 27
Max voltage on the PII's according to AMD is 1.55v. So, 1.55v is safe, as long as the temps are in check as well.

Man I don't know. 1.5v seems pretty high for 3.4-3.5ghz. What are your voltage readings under load and idle?
post #10 of 27
read this guide:
http://www.overclock.net/t/777378/official-gappos-little-deneb-thuban-overclocking-guide-with-too-many-smileys/0_20
Do everything in order :thumb.gif:
 
Thuban Powah!
(14 items)
 
 
CPUMotherboardGraphicsRAM
Xeon X5650 Asus P6X58D-E Sapphire HD 7950 G.Skill Trident-X 2600 CL10 
Hard DriveCoolingPowerCase
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cheap! Newegg box panel ibeats with onboard. 
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Thuban Powah!
(14 items)
 
 
CPUMotherboardGraphicsRAM
Xeon X5650 Asus P6X58D-E Sapphire HD 7950 G.Skill Trident-X 2600 CL10 
Hard DriveCoolingPowerCase
Samsung 840 pro Bong cooler / RASA waterblock Rosewill Capstone Gold 750 None 
MouseMouse PadAudio
cheap! Newegg box panel ibeats with onboard. 
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1075T w/2 cores locked @ 4.2+ M4a89GTD-Pro XFX Radeon HD 5870 8gb Samsung ddr3 1600 11-11-11-28@ 8-8-8-24 
Hard DriveHard DriveOptical DriveCooling
OCZ Agility2 40gb WD Blue 500GB Lite-On RASA waterblock 
OSMonitorKeyboardPower
Windows & Linux Samsung 1080p 2 ms Dell Thermaltake TR2-800 
CaseMouse
Cooler Master Elite 330 (was) cheap 
  hide details  
Reply
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