Can't raise over 4.7 GHz AMD Athlon X4 760K

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XtremeAero426

XtremeAero426

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I' overclocking to 4.6GHz and I'm overvolting by 0.2V which is seemingly high enough. (I could get 4.6GHz with an 0.15V overvolt) I get 52C max temp on 4.6GHz. However, whenever I raise my frequency to 4.7GHz (Using Prime 95) my system crashes. Temps are stable and my voltage is high enough so why can't I raise over 4.6GHz?

Specs:
AMD Athlon X4 760K (OC'd to 4.6GHz)
MSI A88X G45 Gaming FM2+ ATX Motherboard
PNY XLR8 1x8GB 1866MHz
MSI Twin Frozr GTX 760 4GB (OC'd to 1.26GHz)
Cooler Master V8 GTS
Cooler Master Enforcer
Rosewill Lightning 1300w 80+ Gold Certified
Mushkin Enhanced Chronos 480GB SSD (C:\ Drive)
Kingston SSDNow V3 120GB SSD (H:\ Drive)
Seagate 1TB HDD (D:\ Drive)

Update: Turning off my computer after OC'ing even a little resets my settings to default each time and my computer turns off everytime I try to restart it afterwards and then I have to turn it on and off three times.

Here's what happens in order:
1. Overclock the CPU and is stable. (does not crash @ 4.6GHz or lower)
2. Turn off computer.
3. Turn on computer, computer turns on then immediately turn off.
4. Turn computer on and off 3 times before a message pops up and tells me my CPU's overclock has been reset to default clock speed.
5. Forced to enter BIOS.

Extra Notes:
- I have tried overclocking with AMD Overdrive AND MSI Command Center. None of which changed the above situation described.

- If I change the multiplier to 44(100) in BIOS I only get 42(100) multiplier when my computer turns on. Source: CPU-Z
 
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clutchc

clutchc

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Processors are "binned" or sorted as they are produced to determine the quality of the batch. Some are better than others.
 
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CptBarbossa

CptBarbossa

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That is a pretty good overclock for that chip anyway. Anything over 4.5 for the athlons/a series I find to be pretty good. I got my a10 6800k to a stable 4.829, but just barely. It sits very comfortably at 4.7. I would be happy at 4.6

However, if you are like me and are unwilling to settle, then try dropping your clock rate to 4.5 and bump your base frequency up to 105. You will have to drop your nb frequency and ram frequency initially to rule them out as a stability problem. After you find your highest clock with the base frequency, work your RAM and NB frequencies back up to as close to stock as you can (you can go just under or just over).

I was unable to get past 4.7 stable, so I decided to try the base frequency route and I was able to get to my stable 4.829. It is riskier, but if you are careful, watch your temps and pay attention to your stress test runs you should be fine.
 
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XtremeAero426

XtremeAero426

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Thanks, that really helped. So I can't use a multiplier over 46. Anyways do you know a solution to the update? I can't get over 4.2 GHz without having to bump it back up to 4.6GHz everytime I start up.

Also, how do I know what NB frequency to use?
 
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CptBarbossa

CptBarbossa

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The only thing I can think of is maybe a bios update. It sounds like something at startup really doesn't like your overclock config. Some motherboards do a fail safe and revert to the original bios settings if it fails to boot after 3 attempts (hence the problem). Go to your motherboard manufacturer website for the update files and instructions on update. Keep in mind that bios updates are heavily discouraged if your system works as intended. I have only done it a couple times. I never had a problem but that doesn't mean you wont. If for some reason you lose power during the flash it will most likely damage your motherboard.
 
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CptBarbossa

CptBarbossa

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What I did with the nb frequency was set it to the highest clock that was BELOW stock after the base frequency bump. It will probably be different for your motherboard, but for example, if stock is 1800mhz and you bump the base freq to 105, it will bump your nb to 1890mhz. In order to keep it from overclocking you lower the nb multiplier from x18 to x17 bringing your nb to 1785mhz. This is just an example, you will have to do the math yourself. The goal is to change the nb multiplier to right at or just below stock speed in order to prevent it from overheating or causing system instability. exact same thing goes for you RAM.
 
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XtremeAero426

XtremeAero426

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Oh, so I should just OC the NB like RAM. Ok. Also, what do I do about the "Update:" issue? (Refer to Description)
 
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C

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What does your overall Vcore (CPU Voltage) amount to with your 0.15 offset? You may still have some voltage headroom.

The MSI A88X Gaming, I think, has only a 4+2 phase VRM, and 4.6ghz is not a bad overclock. Voltages aside, you may have reached your overclocking limit, the question is whether it is your mobo or CPU.
 
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XtremeAero426

XtremeAero426

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It's 1.4688V and that's a 0.2V offset
 
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C

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You can go a bit higher. Although 1.55 volts is the maximum, most people try to keep their top voltages at 1.5; I think this is a good rule of thumb.

With the "extra" headroom, you may be able to make it to 4.8 ghz. I wouldn't be surprised if you managed 5 ghz, but, you'll find out. Keep us posted!
 
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CptBarbossa

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You technically aren't overclocking the nb and RAM. In fact you need to UNDERCLOCKING them. Adjusting the base frequency overclocks multiple things, including you cpu, nb and RAM. Essentially what I explained is just eliminating the overclock on the nb and RAM by underclocking them back to or close to stock. That way you are only overclocking the cpu. I highly discourage overclocking the nb unless you have an aftermarket nb cooler. They are a lot more finicky than overclocking your cpu and can be damaged much more easily.

As far as your update goes, have you updated your bios yet? Later bios models typically provide better system stability, which seams to be your problem when you overclock.

Keep a close eye on your temps. Even with my h80i my thermal limits were getting REALLY tight at 1.49v. Here is a link as to how to properly monitor your cpu temps.

http://www.tomshardware.com/faq/id-2122665/understanding-temperature-amd-cpus-apus.html
 
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XtremeAero426

XtremeAero426

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I'm getting 52C max temp @ 4.6GHz so I think I can push to 5GHz if my motherboard and cpu allows it. I'm starting to wish I had gone Intel..... Oh well. I'll just upgrade when Broadwell comes out.

Also, I'm going to do a BIOS update and see if that helps. The motherboard I have is relatively new since I have an A88 chipset.
 
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CptBarbossa

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Here is a more visual idea of what I am talking about with the overclock with the base frequency. Note I used my RAM and NB from my motherboard to explain, but it should explain it pretty well. The reason you underclock the RAM and NB is to make sure they are not contributing to your instability and so that they dont overheat/get damaged due to overclock.

6kTMncj.jpg
[/URL][/img]
 
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C

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A88X-g45 Gaming motherboard pretty much lacks Load Line Calibration, if I recall correctly. I think you can pretty much only use the offset voltages.

As for disabling Core C6 State, go into your BIOS, toggle the OC tab, scroll down to "CPU Features" and there should be the option to enable/disable Core C6 State.
 
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CptBarbossa

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I am not sure on your motherboard. In mine the core c6 is under cpu configuration and LLC is under the overclock tab after you turn off auto clock, but my board is an asrock so it is likely to be different.
 
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burninatortech43

burninatortech43

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I was able to get my 760k up to 4.7ghz at 1.525 V. I didn't mess with the BCLK. My temps peak around 60C on a h80i. Seems relatively stable.

I'm using the Gigabyte A88X-WIFI. It's a surprisingly good overclocker for such a small board.
 
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