M5A99FX pro r2.0 will not post after vCORE manual adjustment

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Seakane

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Oct 3, 2014
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I'm trying for a mild OC on my M5A99FX Pro R2.0 / AMD8350 combo.

I'm able to raise the CPU Freq to 4.5 by manually setting the multiplier to 22.5 The machine boots up fine, but fails Prime95 right away. Must be time to raise the vcore, right? Here's the problem:

No matter what value I try to use for the CPU voltage, the computer refuses to post. If I set the voltage manually, it wont boot. I've tried values between 1.34 and 1.5 --nothing outside that range. In order to limit variables, I even reset the board to factory defaults, set the clock time and /only/ adjusted the CPU voltage. Refuses to post.

Also, I have tried it with Turbo mode and all power saving features turned off.

Any thoughts? Am I missing anything obvious? Heat is not an issue. I'm failing before I even have a chance to get sweaty.

The components:

Antec Nine Hundred Case with tons of airflow
Asus M5A99FX Pro R2.0
AMD8350 with Cooler Master Heat Sink
G.Skill Ram F3-2400c10D-16GTX
Old old old Saphire video card 256mb

I'm sure my problem is a dumb new guy problem. Hoping one of you fine folks will take pity and boot me in the right direstion.

-Aaron

P. S. If I have posted this on the OC.net forum as well. Responses have been minimal, so I have choosen to try my luck here. Hope this does not offend anyone.
 
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Seakane

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Ok, i gave it a go. Upping the NB-CPU voltage did not ah heck up booting. Changing cpu voltage to 1.48v did. Will not post now.

Interestingly...

All values are shown in black font except for the manually inputted cpu voltage and the dram voltage which i put in. They are both highlighted in yellow. The 1.25v for cpu/nb you suggested is in black.
 
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Seakane

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Ok, that makes sense with the yellow. I used 1.65v for the dram voltage as it is the value listed on the chips. The cpu voltage i borrowed from a posting suggesting that was a good stable voltage for 4.5ghz with my board/chip.

I have tried low voltages for the cpu as well. I've tried 1.34v as was choosen by the auto function. That was enough to prevent it from booting. This was with no OC at all. Bone stock settings, /only/ setting the vcore manually to the same value as the auto value, and later I tried a little higher voltages incriment by incriment. Fails to boot if i manually enter any cpu voltage low or high, and with or without OC.
 
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Tradesman1

Tradesman1

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Jun 5, 2013
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You need some OC to it, a overly high voltage for the settings can crash it or cause it not to boot same as being undervolted for the settings, that's why I suggested just going up a little at a time, start at the stock voltage and see how high it can go then increase voltage a little - no big jumps and try if it will go higher, if no, then a little more voltage, etc
 
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Seakane

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Ok, I will give that a go. Seems like it shouldn't tank if I manually choose the same setting 'auto' had choosen. I'll OC (by raising the multiplier ever so slightly) and follow with small voltage changes and report.
 
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Seakane

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Okay, power saving features and turbo mode disabled. Set multiplier to 21.0 (normal is 20.0) and voltage to 1.38v (auto suggestes 1.34v). And we failed to boot (posted, but froze at the splash screen, had to clr rtc to get back to bios)

Could my board be a pos?
 
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Seakane

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I have been been clocking the memory at 1866. --is this legit? I know the ram is not optimal, but it should still work fine if set to the cpu's speed limit, right? Could this be the source of my woes? I'd swap them out with others, but i haven't access to any other ddr3 ram. It passed memtest86 for 7 hours set this way.
 
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Seakane

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Ok, I'll slow the memory down further yet while I fuss with the processor voltage to make sure it isn't a contributing factor.
 
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Seakane

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Ok I have another clue, if you're still with me and interested:

I can adjust vcore by AI Suite II. I can OC to 4.5ghz and run prime95 with a vcore of1.4v. Temps ate acceptable socket=65max. Core=48max, as measured by hw monitor under prime's torture test. (Memory was clocked @ 1866)

Here's the booger in it though:

When I reboot, it hangs like just before. Had to set bios back to auto setings and it booted like a champ. What happens at startup that prevents booting? Is there something obvious that I'm missing?
 
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Darkbreeze

Darkbreeze

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Jun 24, 2014
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Any chance this is PSU related? You don't mention what PSU you are using, brand and model, and I know there are a lot of PSUs that are not recommended for overclocking due to their poor quality. There is an inrush of current at startup so if you have a unit with poor compliance for this, as some models are explicitly noted as having on the Tier list, I guess maybe this could be possible.

It's probably not the issue but I thought maybe it was worth at least considering or eliminating as a possibility since you're issue mainly occurs at startup.
 
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Seakane

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The power supply is a Cooler Master RP-600-PCAR. 600w ATX12v. I had tried using a couple online wattage usage calculators where you plug in your components and it spits out a total wattage. None of them ever broke the 400w mark. I figured 600w was probably ok. Though somehow doubling the capacity of the required wattage input seems like a good idea...
 
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Darkbreeze

Darkbreeze

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Well, the RP series CM PSUs are tier 3 units and are expressly noted as not ideal for overclocking, but it's still a long shot. Also, they are not apparently noted as having common issues with inrush current so that may or may not dispel that possibility. I'd say stick to what Tradesman1 suggests but it might be a good idea to get a higher tiered PSU anyhow if you plan to continue overclocking.

Also, another long shot, but I'm wondering if there's any chance that "old, old, old Sapphire card" might not be part or all of the issue.
 
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Seakane

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I have re-bumped the cpu/nb up to 1.25v again. Vcore@1.425v. Prime95 and temps are stable. I'll reboot and see if it works...
***
Well it booted up just fine, but it ate both voltages in the process. Vcore=1.35 cpu/nb=1.1v

Tried saving it as a profile. That didn't help it save the voltage settings either. Hrm.
 
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Seakane

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The vid card is a saphire ati radeon hd 2600 xt with 256mb. I can swap this out with a newer and better card. One within the last couple years or so, at least.

My power supply is crap?! Rats. So what is the good manufacturer / brand these days? Who do I stay away from?
 
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Darkbreeze

Darkbreeze

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Well, it's not crap, not by a long shot, but it's not top shelf either. Tier 3 PSUs are fine for mainstream user desktops. For gaming and overclocking you really do want something a bit better. It's ok, you probably don't need to replace it like, tonight. But I would at some point. Seasonic, XFX, BeQuiet and anything made by Superflower, are all likely to be good PSUs. Many other brands like Antec, Corsair, Cooler Master, Rosewill, OCZ, FSP and Zalman to name a few, have both very good, ok and sometimes poor model lines.

Most companies don't make their own PSUs, they just relabel them with their own brand name. Seasonic, Superflower and Channel Well Tech, are all good manufacturers who make PSUs for a lot of these companies that rebrand those units. All the same are a lot of companies making cheap units that are then rebranded by some of those same companies, as cheap models, and that's what they are, cheap.

It's always a sure bet to check the PSU tier list to see if the model you're looking at has a decent ranking on that list. For gaming and overclocking you want something at least Tier 2b. Obviously, higher is better.

http://www.tomshardware.com/forum/id-1804779/power-supply-unit-tier-list.html
 
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Seakane

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Well as it happens, I had some digi+ settings on auto that needed manual input settings.

I started with the recomended settings found here:

http://www.overclock.net/t/1348623/amd-bulldozer-and-piledriver-overclocking-guide-asus-motherboard

--Under the digi plus section. Pretty sure I'm going to be doing a bit of reading there...

Well, the PSU /is/ 7+ years old. Maybe it is time to retire it and put it on the 'just in case' shelf. Much of the digi+ power control is about bolstering saggy voltage under a loads. Kinda /sounds/ like power supply domain, huh?
 
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Darkbreeze

Darkbreeze

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Very possible, even probably likely. As mentioned before, any of the Tier 2B or higher PSUs will provide good, clean and reliable power for probably another 7 years, if not more, and likely be more compatible with the voltage requirements of your configuration.
 
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BrandonCSLC

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Yeah.. That RAM is not compatible with the MOBO. I have the same motherboard. Also there is a lot more to overclocking than changing the multiplier and vcore. You need to change the CPU load line calibration and NB LLC to "ultra high" or "extreme" for clocks higher than stock. You also need to adjust cpu current capacity and a few other settings to make sure your cpu gets enough power. Keep doing your research. I finally figured it out after about a month of tinkering and research. Check your mobo manual. It has a list of compatable RAM.
 
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Darkbreeze

Darkbreeze

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Actually, it is compatible. That board supports DDR3 2400mhz modules according to this:

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CCAQFjAA&url=http%3A%2F%2Fdlcdnet.asus.com%2Fpub%2FASUS%2Fmb%2FSocketAM3%2B%2FM5A99FX_PRO_R20%2FM5A99FX_PRO_R20_Memory_QVL.pdf&ei=Ur5WVMPcB82jyASdz4LgCw&usg=AFQjCNG21nJ1dNUxXd8vQ2JPDAo-wAaAJw&sig2=dzsVFlCPD4KAMFwFPSRljA

But the CPU may not. In fact, it almost certainly won't support two DDR3 2400mhz modules@2400mhz.


http://support.amd.com/en-us/kb-articles/Pages/ddr3memoryfrequencyguide.aspx
 
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