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Overclocking the FX 8350 on a 4+1 powerphase 970a-D3P? - Page 2

post #11 of 31
Quote:
Originally Posted by SubZeroS3 View Post

Ok thanks for your help, you reckon if I pass the stress test you linked on those clocks then I should be safe running at those clocks? Sorry for being kind of hard to deal with, but the guys over at LTT freaked me out with their "holy **** your motherboard will catch on fire" replies.

On 4+1 970 chipset motherboards, a "normal" expectation for overclock with 8 cores, is 4.1-4.4 (depending on model, brand, individual case conditions). This doesn't mean it's "safe", as the motherboard is stressed anyway. 4.6 is usually territory for 6+2 phase motherboards or better. Passing IBT alone doesn't mean the board is "cosy" with that voltage/clock. It's useful to see 1) if the overclock is stable, 2) what temperatures is the motherboard operating at. The biggest problem with so high clocks that you can't usually see on software, is VRM temperature. Ideally you 'd need to manually read the temperature of VRM with IR thermometer. The motherboard is fortunately heatsink, but since it's 4+1 phase, the mosfets will be very hot. If you can measure the temp on the heatsink, you can be sure that the mosfets below are running even hotter.

Personally, i 'd drop at least to 4.5Ghz and possibly drop the voltage too and put a small fan to blow on the VRM heatsink, because there is no way it's not running very hot. And VRM is the no1 reason that kills motherboards that are overclocked and when this happens, it can kill the CPU too.

Even 8+2 motherboards get under considerable stress at 4.5Ghz. Imagine a motherboard with half the phases. When you push something hard, you are always taking risks. So you have to decide how much of a risk you are willing to take and then do your best to mitigate this risk (fan on VRM and good air circulation inside the case).

I 've 4+1 motherboards myself and when using FX 8 core, i was running at "mere" 4Ghz and undervolted (of course). Now i am running it on 8+2 phase again at 4Ghz undervolted. Why? Because i don't need more and don't want to minimize risks... There is no such thing as 100% safety. People here have bought the best motherboards and overlclocked to 5Ghz and some failed. It's a lot of stress. Every overclocker must decide how much of risk is worth to push for some more Mhz.

EDIT:

Note: I am the least experienced overclocker in this forum. My opinion is based on observation of cases that i 've seen in the forum. The most prudent course of action, is the one Stilt mentioned (Stilt is famous overclocker, you can even google him). But i am trying to explain the situation, so that you can make your decisions. For example 4.2 is a more "normal" clock for "good" 4+1 motherboards. Meaning, less risky. But the risk at the end is decided by the user.

P.S.: Seems that Gigabyte has produced a very good 4+1 motherboard with this one. But it's always 4+1.
Edited by Undervolter - 10/31/15 at 12:01pm
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post #12 of 31
Thread Starter 
I've decided I'll run it at 4.5GHz. I doubt it will explode, and if it does... well... tough luck, excuse to buy a 990FX chipset with 8+2 powerphase to run it at 5.2GHz I guess.


One thing I can say from all this testing is that the Cryorig R1 Ultimate is absolutely brilliant. at around 25-26 degree room temperature the CPU never went above 45 degrees in any stress test, game or benchmark. thumb.gif
post #13 of 31
Quote:
Originally Posted by SubZeroS3 View Post

I've decided I'll run it at 4.5GHz. I doubt it will explode, and if it does... well... tough luck, excuse to buy a 990FX chipset with 8+2 powerphase to run it at 5.2GHz I guess.

Since you drop to 4.5, also drop the vcore a bit, because most of power consumption (and thus heat), comes from the increased voltage, rather than the clock. Since you want to go by AIDA, if you can pass 4.5 on less volts, better.
Quote:
One thing I can say from all this testing is that the Cryorig R1 Ultimate is absolutely brilliant. at around 25-26 degree room temperature the CPU never went above 45 degrees in any stress test, game or benchmark. thumb.gif

I just hope that you haven't so low temperatures because you throttle. I mean, when you run AIDA's test, in CPU-Z, the CPU frequency should be pinned at 4.5 in this case and never drop. If you see it drop, it means your VRM is overheating, throttling down the CPU. It's just a scenario. I don't know your cooler, it may be very good and the only cause of the low temps. Just saying...
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post #14 of 31
Here is a rule of thumb that I live by for ocing.
Ocing any 125w FX chip + 4+1 mobo = Bad Idea.
4+1 phase power is really only design to run 95w and lower at stock.
I have tested many 4+1 phase power mobo. In most cases a 4+1 will throttle a 125W cpu. With fans it may take it for the short time, but for the long haul to will fail.

Remember there is only 2 exception for ocing on a 4+1. Biostar TA990FXE and Biostar TA970XE, which is the worlds best 4+1 and very hard to find.
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post #15 of 31
Thread Starter 
No throttling is occurring. 4.5GHz constant
post #16 of 31
Quote:
Originally Posted by dixson01974 View Post

Here is a rule of thumb that I live by for ocing.
Ocing any 125w FX chip + 4+1 mobo = Bad Idea.
4+1 phase power is really only design to run 95w and lower at stock.
I have tested many 4+1 phase power mobo. In most cases a 4+1 will throttle a 125W cpu. With fans it may take it for the short time, but for the long haul to will fail.

I consider 140W the "safety" limit for 4+1 heatsinked motherboards with 8 pin CPU connector. 95W motherboards come with 3+1 or less phases. Not that i reccommend overclocking on 4+1, but people buy them and want to overclock and actually do so. The question is, like you say, how many of them will fail in the long run... That's a big question... I 've ran FX8320@4Ghz on Asrock 970 Extreme3 (which isn't the best 4+1 around) for several months, with x264 encoding for hours and hours and it had no issues. Checked with IR thermometer too. But 4Ghz undervolted was my "safety margin". I wouldn't go beyond that.

Quote:
Remember there is only 2 exception for ocing on a 4+1. Biostar TA990FXE and Biostar TA970XE, which is the worlds best 4+1 and very hard to find.

Maybe we have just discovered the 3rd exception? From Newegg reviews of this motherboard:







The question of course is... "how long will it last...". But, we have a saying here: "A warned man, is a half-way saved man". He knows the risks, if he decided to take it... it's his hardware...
Edited by Undervolter - 10/31/15 at 1:43pm
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post #17 of 31
If you don't want to risk it,
have a fan blowing on VRMS.
Touch the heat sink and the chokes it any exceeds 60C then most likely its getting dangerous.

If it is only warm to the touch, then great you can push more voltage by all means.

If its getting cooky but not really cooking then your fine. Just don't push any more volts thumb.gif

As long as VRMS and chokes are less than hot to the touch, your fine not risky at all
post #18 of 31
Quote:
Originally Posted by SubZeroS3 View Post

No throttling is occurring. 4.5GHz constant
I said most cases and not all cases. The main thing is how long it will last.
Quote:
Originally Posted by Undervolter View Post

Quote:
Originally Posted by dixson01974 View Post

Here is a rule of thumb that I live by for ocing.
Ocing any 125w FX chip + 4+1 mobo = Bad Idea.
4+1 phase power is really only design to run 95w and lower at stock.
I have tested many 4+1 phase power mobo. In most cases a 4+1 will throttle a 125W cpu. With fans it may take it for the short time, but for the long haul to will fail.

I consider 140W the "safety" limit for 4+1 heatsinked motherboards with 8 pin CPU connector. 95W motherboards come with 3+1 or less phases. Not that i reccommend overclocking on 4+1, but people buy them and want to overclock and actually do so. The question is, like you say, how many of them will fail in the long run... That's a big question... I 've ran FX8320@4Ghz on Asrock 970 Extreme3 (which isn't the best 4+1 around) for several months, with x264 encoding for hours and hours and it had no issues. Checked with IR thermometer too. But 4Ghz undervolted was my "safety margin". I wouldn't go beyond that.

Quote:
Remember there is only 2 exception for ocing on a 4+1. Biostar TA990FXE and Biostar TA970XE, which is the worlds best 4+1 and very hard to find.

Maybe we have just discovered the 3rd exception? From Newegg reviews of this motherboard:







The question of course is... "how long will it last...". But, we have a saying here: "A warned man, is a half-way saved man". He knows the risks, if he decided to take it... it's his hardware...
Let me rephrase this part.
Remember there is only 2 exception for ocing on a 4+1. Biostar TA990FXE and Biostar TA970XE, which is the worlds best 4+1 and very hard to find. This are the only 2 4+1 I would go for 5.0ghz with any FX-8***.
Edited by dixson01974 - 10/31/15 at 3:01pm
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post #19 of 31
Quote:
Originally Posted by dixson01974 View Post

I said most cases and not all cases. The main thing is how long it will last.

Exactly. Because if his mosfets are like 5C below throttling point, this is something that slowly will take its toll. The motherboard may fail after 6 months or 1 year or 5 years. Who knows... But, at least he made an informed choice.
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post #20 of 31
The VRM temperature information should be available in HWInfo. The board has digital VRM controller and it is generally very well protected (if configured properly by Gigabyte). Keep in mind that displayed temperature is measured from a sensor placed close to the inductors. The temperature of the actual low-side mosfets will be higher.
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