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Overclocking the FX-8320E with a Gigabyte 990FXA-UD5 Rev3.0

post #1 of 154
Thread Starter 
CPU - AMD FX-8320E
CPU Heatsink - Cooler Master Hyper 212 Evo (2x120mm fans) [[[Wife purchased an NZXT Kraken X61 for my Christmas present.. so I get to wait for that]]]
Thermal Paste - Gelid GC-Extreme
Motherboard - Gigabyte 990FXA-UD5 Rev3.0 [Latest Firmware]
RAM - ADATA USA XPG V1.0 OC Series 8GB DDR3 1866MHZ PC3 14900 4GBx2, Red AX3U1866W4G10-DR
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Video - Sapphire AMD Radeon R9 290 4GB GDDR5 2DVI/HDMI/DisplayPort PCI-Express Video Card
PSU - EVGA SuperNOVA 1300G2 ATX12V/EPS12V 1300W 80Plus Gold Power Supply 120-G2-1300-XR
Case - NZXT Source 210 Elite (All fans populated [including side fan] & circulating correctly, top slots using 140mm fans)


Thanks to the success of the FX-4130 (and the pursuit of knowledge [and power?]) .. thread = http://www.overclock.net/t/1518583/overclocking-the-fx-4130-with-a-gigabyte-990fxa-ud5-rev3-0 ... I decided to try my luck with the FX-8320E .. I was driven to it by the TDP of 95W & its overclocking potential.


What have I done thus far?

I literally got the processor tonight.. Reset the BIOS to factory defaults, set it up to remove all the correct CPU power-saving features.. and enabled HPC mode (specific to Gigabyte boards?).. LLC set to Ultra High, RAM set to 1.5V with the timings recommended by CPU-Z in the SPD tab for XMP-1866. I have provided the CPU vCore +0.075V to where it is feeding the CPU 1.26V at full load with Prime95. I provided the CPU/NB a boost of +0.05V for stability's sake. CPU/NB is set to 2200 by default, HT is at 2600.

Leaving the CPU at 200MHz & using the multiplier to O/C it. Currently at 4.0GHz running a blend test.. running at 34C maximum at this point. I feel there is plenty of growth potential to reach at least 4.5GHz on an air-cooled configuration.

I have a one-month infant & an 18-month old.. so my O/C'ing time is limited to the later evenings when the house quiets down.

Thank you all in advance for your assistance or advice thumb.gifthumb.gif
Edited by ultrasparc - 10/30/14 at 5:07am
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post #2 of 154
Thread Starter 
Small update.. Just doing quick 10-15 Prime95 blend tests to establish a baseline for multipliers & voltage minimums.. I am up to 4.62GHz @ 1.41V on the CPU Core Voltage.. using 200MHz as the Bus Speed.

Temperatures are stable at 50C on the Blend Test, so I am starting to get up there. I suspect one or two more increases in voltage will get me very close to my safe temperature peaks of staying below 60-65C on small FFTs.

Pretty damn good processor for being sold at 3.2GHz.
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post #3 of 154
Thread Starter 
4.6GHz requiring a lot more voltage than expected.. backing down to 4.5GHz to see if I can get that stable first.. and run something overnight.
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post #4 of 154
Thread Starter 
No luck at 4.5GHz overnight, 2 cores tanked at 30 minutes into Prime95.. I'm pretty close on voltage, but I'm going to drop it to 4.4GHz to see where stability lies at this current voltage on Ultra High LLC... Boy this thing gets hot at 1.4V. I dropped the RAM to Auto/Auto to let it throttle back to ensure I'm not having any memory-related problems. I kicked off a 4.41GHz Prime95 blend test before I left this morning.

Any advantage to adjusting the bus speed versus multiplier to allow me to hit higher clock speeds? I am not looking to OC my memory at this point.
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post #5 of 154
I am not sure if there is something different with the Es of am3+, but try and mess with bus speed ? I remember on my 8350 I got 4.8 @ 1.465v with 2133 ram sticks and with a bus speed of like 207
    
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post #6 of 154
Thread Starter 
Quote:
Originally Posted by soulwrath View Post

I am not sure if there is something different with the Es of am3+, but try and mess with bus speed ? I remember on my 8350 I got 4.8 @ 1.465v with 2133 ram sticks and with a bus speed of like 207

Is that with air cooling or water cooled? Anytime I'd get into the 1.44-1.45V range, temperatures would go 65C+ on small FFTs.
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post #7 of 154
Thread Starter 
Starting to wonder if I botched the thermal paste application or if these just run that hot at 1.40V-1.45V.

On a related note that I mentioned in my other thread.. I gave my wife my request for a Christmas present of an NZXT Kraken X61.. so there is hope later to get up higher beyond air cooled if desired. I was really hoping for about 4.5 or 4.6 GHz.. Based on what I am seeing thus far with this particular chip, I am guessing 4.4GHz or 4.5GHz are more reasonable goals for air cooling.
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post #8 of 154
H100 which is comparable to a nd 14, also isnt the threshold 62C?
    
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post #9 of 154
Thread Starter 
Quote:
Originally Posted by soulwrath View Post

H100 which is comparable to a nd 14, also isnt the threshold 62C?

The information I'm finding is fuzzy.. but I believe you are correct, since it's a 95w TDP.. it's going to be lower than the 125w TDP FX-4130 I just used. I need to keep that in mind when gauging my temperatures. I'm still a little in the mindset that low 60's are OK.
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post #10 of 154
Quote:
Originally Posted by ultrasparc View Post

The information I'm finding is fuzzy.. but I believe you are correct, since it's a 95w TDP.. it's going to be lower than the 125w TDP FX-4130 I just used. I need to keep that in mind when gauging my temperatures. I'm still a little in the mindset that low 60's are OK.

Keep in mind the lower TDP is a product of the lower core speed/ vCore. Once you bump the vCore up the TDP goes out the window.

I need to do some systematic testing (better yet find several people do systematic testing) but I've noticed a few things with my 8370E. First, the chip and my NB run hotter than my 8350 did with lower vCore once I go past stock. My memory is running considerably faster (~1800 --> 2133) so that may explain the NB. At 4.5 @1.42 the 8350 would peak around 50C, where as 4.7 @ 1.39 on the 8370E goes to ~ 54 or higher. Obviously delta is more important but I don't have those numbers.

Second, undervolting seems to be about the same as other 8350s (mine was a bit subpar), with 4.5 around 1.32. 4 @ 1.17 does seem to be an improvement in comparison (again, not a systematic comparison). I do see an improvement with overclocking. For 4.7 my 8350 required 1.46 and could not handle memory above 1800. Any increases beyond 4.7 took big voltage increases. So far I've topped out at 1.39 for 4.7; basically stock voltage of my old 8350.

Finally, the IMC is improved, maybe not to every 8350, but compared to the 8350 I had.

Unfortunately it is difficult to do a large comparison because of different hardware, etc. And that I just plan do not believe most of the numbers in the 8350/8320 club.
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