Topic Title: FX-8350 Overclocking Need Help for Stabilisation
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Created On: 02/12/2014 07:12 PM
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 02/12/2014 07:12 PM
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charest2394
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Hello,

I am working on overclocking of my FX-8350 at 4.4Ghz in the moment I have a system stable I think when I am benchmark with 3D mark 11 ou Fire Strike the work really great.

I have made a test of 2 hours with prime 95 and after 1 hour and 34 minutes I have a error of ILLEGAL SUMOUT on Core #8...

After this I have stop the test but this error was caused by????? I need help for the find tuning of my overclocking.

Is it obligatory to pass 2 hours of prime 95 after the overclocking?

There is the result of a short test of OCCT just for give you the important value of my system.
















-------------------------

AMD FX-8350 @ 4.4Ghz
Asus Crosshair V Formula-z
Patriot Viper 16 Go 1600Mhz (9-9-9-24)
Raid 0 SSD + Raid 0 Caviar Black WD6402AAEX Hard Drive
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Liteon Blu-Ray

 02/12/2014 09:18 PM
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black_zion
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I prefer a more real world test. First I run Prime95 Blend for one complete test, as that will show up any major instability. If that passes, then I use Windows Movie Maker to convert a 2 hour movie file to 1920x1080 with a high bitrate to stress it realistically for an extended period, and repeat it a couple of more times just to make sure. If that passes, then I run 3DMark on Performance in a loop for two or three passes. Other tips too are to increase your CPU VDDA (raises the voltage under load), and to turn on ECC on the L1, L2, and L3 caches with the most aggressive value (2.56µs I believe).

But if you get an hour of Prime95 stability that is far in excess of any kind of stress you will put it under.

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AMD FX-8350 w/ Corsair H105, ASUS Sabertooth 990FX Gen3/R2, 8GiB G.SKILL DDR3-2133, XFX HD 7970, 512GB Vertex 4, 256GB Vector, 240GB Agility 3, Creative X-Fi Titanium w/ Creative Gigaworks S750, SeaSonic X750, Corsair C70, HP ZR2440w, Win 7 Ultimate x64
 02/12/2014 09:58 PM
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charest2394
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If I understand I have a found a good stability not perfect but good with the result than I have 1h30 with before a error in prime 95.

Because the in real I probably never had my CPU charged at 100% during 2 hours continue.

But I am working in the moment to validate the modification I have made on the vcore.

In the moment I am testing the stability with firt a OCCT of 20 minutes after if all works great I will start a test with Prime 95 for two hours and after I will make test with 3D mark 11 and 3D mark Fire Strike.

 

I will give you my result when I finish my test of stability.

Thanks for your time and your help!



-------------------------

AMD FX-8350 @ 4.4Ghz
Asus Crosshair V Formula-z
Patriot Viper 16 Go 1600Mhz (9-9-9-24)
Raid 0 SSD + Raid 0 Caviar Black WD6402AAEX Hard Drive
XFX 850W Black Edition
CrossFire Radeon XFX Core Edition R9 290
NZXT Phantom 630
Liteon Blu-Ray

 02/12/2014 10:14 PM
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AMDforMe
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The answer to your question on PC stability depends on your personal goals. If you want a PC that is 100% reliable then you want a PC that can run P95 for 6-24 hours without any errors. If you are OK with occasional PC crashes, potentially lost data, corrupted files, etc. that you can accept anything less than P95 stability for 6-24 hours. It really depends on what YOU want personally. No PC can be considered 100% stable if it can't run any and all programs including P95 stress testing continuously without errors.

To date P95 is the absolute best and toughest PC stress test program that I have seen. Linpack and the others are good but P95 is the toughest and the one most PCs eventually fail. Many PCs won't be able to run P95 6-24 hours without issue because the BIOS settings are not optimized for the overclock mobo/CPU/RAM or the CPU frequency is simply too high. I've never found 3DMark to be stressful enough to crash a typical PC that was less than 100% stable. Obviously it doesn't hurt to run it but it isn't a very good stresser IME.

Some folks who use their PC mostly for gaming or entertainment don't care if they have occasional system crashes, etc. Other folks who have important data on their PC and don't want to deal with re-installing the O/S or constant PC issues tend to desire a 100% P95 stable system. Only you know what is right or acceptable for your needs.

In my extensive testing of the overclocked FX-8350 I have found that you can get 85-90% P95 stability with close to the default vcore but to get 100% P95 stability often requires a significant increase in the vcore to the ~1.45v range plus or minus depending on the CPU and frequency that you are trying to run. When you get to 4.6 GHz. plus range then you usually need disproportionately more vcore as you approach the limits of the CPU.

You may want to try a couple BIOS settings that seem to help many people if you haven't already set these:

CPU-NB = ~1.3v

HT = 1.25v

HT Frequency = 2600

RAM = .05v above the OE RAM voltage spec whatever it may be

Make sure that your vcore voltage is not changing significantly when under full load from what you set it in the BIOS. Use the best Load Line Calibration (LLC), setting to maintain the vcore as close as possible to the set voltage.



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Technical ignorance is NOT a destiny it is a choice. Do your homework so that you can make technically informed decisions and not be duped by advertising hype or mis-information stated as fact when its not.


 

 02/12/2014 11:02 PM
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charest2394
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Hello,

I have finish my test of stability and after 2 hours of prime 95 I dont have any error.

 

There is the image of my Vcore Voltage during the OCCT of 20 minutes:`

 

My next step is try to reduice the Vcore if it possible or try to go to 4.6Ghz



-------------------------

AMD FX-8350 @ 4.4Ghz
Asus Crosshair V Formula-z
Patriot Viper 16 Go 1600Mhz (9-9-9-24)
Raid 0 SSD + Raid 0 Caviar Black WD6402AAEX Hard Drive
XFX 850W Black Edition
CrossFire Radeon XFX Core Edition R9 290
NZXT Phantom 630
Liteon Blu-Ray

 02/13/2014 10:23 AM
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AMDforMe
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Looks good!



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Technical ignorance is NOT a destiny it is a choice. Do your homework so that you can make technically informed decisions and not be duped by advertising hype or mis-information stated as fact when its not.


 

 02/15/2014 10:06 PM
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Vegan
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Go buy a tube of Arctic MX-4

remove your CPU cooler and clean up any residual material with a cotton ball and some vodka or alcohol

then apply a thin blob of MX-4, wipe over with an old bank card

replace the cooler and clip it back

boot and try again

 



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 02/17/2014 07:05 AM
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charest2394
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Originally posted by: Vegan Go buy a tube of Arctic MX-4

 

remove your CPU cooler and clean up any residual material with a cotton ball and some vodka or alcohol

 

then apply a thin blob of MX-4, wipe over with an old bank card

 

replace the cooler and clip it back

 

boot and try again

 

 

 

 

Why Do you think I have really better temperature Result with the MX-4 compound?



-------------------------

AMD FX-8350 @ 4.4Ghz
Asus Crosshair V Formula-z
Patriot Viper 16 Go 1600Mhz (9-9-9-24)
Raid 0 SSD + Raid 0 Caviar Black WD6402AAEX Hard Drive
XFX 850W Black Edition
CrossFire Radeon XFX Core Edition R9 290
NZXT Phantom 630
Liteon Blu-Ray

 02/17/2014 09:20 AM
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AMDforMe
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Extensive testing has shown that the top ~25 TIMs produce virtually the same temp within 2 degrees C so don't expect any of them to produce a big change unless you are using the cheap TIM from Radio Shack. The stupidly expensive, difficult to use metal coating TIMs may lower a couple more degrees but for what? Most CPU are not impacted by 2 degrees C.



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Technical ignorance is NOT a destiny it is a choice. Do your homework so that you can make technically informed decisions and not be duped by advertising hype or mis-information stated as fact when its not.


 

 02/18/2014 11:27 PM
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charest2394
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I have modifed a couple of options in the bios there is my new result for my 4.4Ghz.

 

There is the result of a 20 minutes of OCCT and I have make a 2 hours of prime 95 and it work perfect!



-------------------------

AMD FX-8350 @ 4.4Ghz
Asus Crosshair V Formula-z
Patriot Viper 16 Go 1600Mhz (9-9-9-24)
Raid 0 SSD + Raid 0 Caviar Black WD6402AAEX Hard Drive
XFX 850W Black Edition
CrossFire Radeon XFX Core Edition R9 290
NZXT Phantom 630
Liteon Blu-Ray

 02/19/2014 04:43 AM
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AMDforMe
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It all looks good but you are right at the CPU thermal limit ~ 61C so you either need more cooling or lower voltages if you run similar temps in gaming, etc. and play for extended periods of time. If your normal PC loads are less than the stress testing then you may be fine as is.



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Technical ignorance is NOT a destiny it is a choice. Do your homework so that you can make technically informed decisions and not be duped by advertising hype or mis-information stated as fact when its not.


 

 02/19/2014 11:57 AM
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charest2394
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Originally posted by: AMDforMe It all looks good but you are right at the CPU thermal limit ~ 61C so you either need more cooling or lower voltages if you run similar temps in gaming, etc. and play for extended periods of time. If your normal PC loads are less than the stress testing then you may be fine as is.

 

Yeah I am on the limit for the Thermal limit but the good new it's in game the temperature do not pass 51 to 55 after a lot of times. But I probably make a couple of modification to my watercooling in the next few week for have better cooling.

I probably try to reduce the voltage in the next few week.

 

But it's a good start



-------------------------

AMD FX-8350 @ 4.4Ghz
Asus Crosshair V Formula-z
Patriot Viper 16 Go 1600Mhz (9-9-9-24)
Raid 0 SSD + Raid 0 Caviar Black WD6402AAEX Hard Drive
XFX 850W Black Edition
CrossFire Radeon XFX Core Edition R9 290
NZXT Phantom 630
Liteon Blu-Ray

 02/20/2014 12:34 PM
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Vegan
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Originally posted by: charest2394
Originally posted by: Vegan Go buy a tube of Arctic MX-4

 

 

 

remove your CPU cooler and clean up any residual material with a cotton ball and some vodka or alcohol

 

 

 

then apply a thin blob of MX-4, wipe over with an old bank card

 

 

 

replace the cooler and clip it back

 

 

 

boot and try again

 

 

 

   

 

 

 

 

Why Do you think I have really better temperature Result with the MX-4 compound?

 

I tried it on video cards and CPUs and in both cases it does work well. I was able to get 4.0 GHz with the factory fan easy with my Phenom II 965 BE and MX-4.

Its not all that expensive, and it may be the ticket to even more speed. Remember too that TIM should be very thinly applied.

http://hardcore-games.azurewebsites.net/wp/hw/tim.php



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 02/20/2014 02:43 PM
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AMDforMe
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The top ~25 TIMs all deliver the same results within ~2C so MX-4 is no better than the rest as proven by countless reviews. Pick which ever one makes you happy but 2 C is not going to make any tangible change in the overclockability of any CPU.

http://www.hardwaresecrets.com/printpage/Thermal-Compound-Roundup-July-2011/1334



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Technical ignorance is NOT a destiny it is a choice. Do your homework so that you can make technically informed decisions and not be duped by advertising hype or mis-information stated as fact when its not.


 

 02/20/2014 09:09 PM
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zipsi
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After going through this list, I recommend to use 'toothpaste' to cool this cpu. 



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Intel I7 3770K @ 4.5ghz, Cooler Master Hyper 212 Evo, Gigabyte Z77X-UD3H, Gigabyte HD7970 ghz edition, 4x4gb Kingston HyperX Beast 2133mhz, Seasonic Platinum 860, Samsung 840 Pro 256gb, OCZ Vertex 4 128gb, WD Black 1TB, WD Green 3TB+1.5TB, ASUS Xonar Essence ST, ASUS VE278Q, Windows 3.11
 02/20/2014 09:41 PM
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AMDforMe
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Actually mayonnaise is the trick set-up and works quite well. Just grab a little off of your sandwich and place it on your CPU and you've got 90% of what the expensive TIMs deliver.  

I suspect over time however the mayo and toothpaste might not fare too well...



-------------------------

Technical ignorance is NOT a destiny it is a choice. Do your homework so that you can make technically informed decisions and not be duped by advertising hype or mis-information stated as fact when its not.


 



Edited: 02/20/2014 at 09:49 PM by AMDforMe
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