safe OC temps for a FX-8320

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safe OC temps for a FX-8320

Postposted on Sat Jun 14, 2014 9:48 am

Hiya everyone,
A friend of mine has a FX-8320 with the stock cooler and he needed a little more performance out of his CPU. He is not tech savvy so I had him download AND Overdrive so I could walk him through overclocking his CPU on teamspeak.

Under a load before overclocking his CPU was running at 1.32 or 1.33 volts and I think 3400mhz according to what he told me using CPUZ to monitor it while running Prime95 and Cinebench 11.5. I had him go right to 1.4 volts and 1.25v on the ht volts and for a multiplier I had him go from 17.5x to 20x. He hit Apply and ran prime 95 and his CPUZ voltage reading was 1.380v and his CPU was running at 4300 MHZ which I though was strange since we only upped the multiplier to 20x. His temps pretty quickly climbed to 71c in around 3-5 minutes so I always keep mine under 70c I had him stop the stress test. With him using the stock cooler I was not surprised. So I told him he needed a new CPU cooler and I foist told him to get the Hyoer 212 EVO. Well he was ready to pull the trigger but I found out he did not have a cpu cutout in his case so I informed him he would have to remove the motherboard to install the hyper 212 evo cooler. He said he was very uncomfortable doing that so I was thinking a Cooler Master tx3 since it can be mounted with the stock AMD mounting kit. Well I did not think it would have the cooling capability he would need so I happened across Cooler Masters T4 cooler that is basically like the older Hyper 212 Plus with the 4 direct touch heatpipes and a tall tower holding a 120mm fan. But the Coolermaster T4 can mount using the Stock AMD mounting bracket and it came with a pull fan mounting hardware, so I told him to order that cooler since he will not remove his motherboard I figured this is about the best he can get. Also since he games only with a set of wireless USB headphones and fan noise is not a problem I also had him order a very high flow 120mm fan for PULL duty that does 110+CFM but is not a delta fan. I figure this will help the push fan out greatly and with the extra 40 CFM increase the cooling abilty of the T4.

So what do you all think is a safe max loaded temperature for his FX-8320?? I Also would like to know if anyone has a TX4 and what you think of its performance over the stock AMD cooler?? Thank you all ahead of time. Its time to go to the beach for the 1st time this weekend so you all have a good weekend also cyas!
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Re: safe OC temps for a FX-8320

Postposted on Sun Jun 15, 2014 6:48 am

Seriously nobody can tell me safe voltages and temps for a FX-8320 ?? I would also like to add the chip is mounted in a ASUS M5A99FX Pro V2.0 motherboard that is rated for 145 watt CPU's but I also checked fpr compatibility for the FX-9370 and FX-95XX 220 watt chips and it does support those also.

Last night using the AMD overdrive Program he upped the multiplier from 20x to 20.5x with the same 1.4v on the vcore and 1.25 for the HTbus and his system was running at 4456mhz under a load and scoring over 7.2 points on Cinebench 11.5 Up from 5.3 points. Also he made sure his CPU fan was running at the max speed it could on the stock cooler and temps topped out around 69C...now I am not sure how temps compare on AMD chips compared to Intel chips that I am much more familiar with.

So once again if you guys and a gal or 2 could give me safe operating temps along with safe voltage I and my friend would appreciate it. Sure I can google it but this it what the TR forums are for aren't they?
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Re: safe OC temps for a FX-8320

Postposted on Sun Jun 15, 2014 7:24 am

I have the 8350 and from previous looking around safe temperature are around 63c don't let it go past that and the and overdrive is not a good overclocker it sets voltage way higher than needed I suggest teaching him how to change fsb which is fairly simple and get desired overclock and keep and eye on the ram speed as well if it is running under spec or not

Normally Intel burn test and hand brake give best stress tests for me if any fail it's a no go

And Intel burn test will make the cpu run very hot theses temperatures are never seen while gaming or encoding so if he does get around 67 or 69 it's okay as long as it's stable in Intel burn test it is mostly fine
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Re: safe OC temps for a FX-8320

Postposted on Sun Jun 15, 2014 9:28 am

Official temps from AMD FX are 62°C I think. It's hard to find values specifically for the FX-8320 but AMD processors have always been in the 60-70°C range, though i think some of the chopped-down chips were specced at up to 71°C.

The 32nm SOI process used to make these FX chips shouldn't suffer any long-term damage as long as it stays under 90°C but the reason often cited for the low maximum temperature ratings AMD provide is to do with TDP and leakage, in that AMD would exceed their TDP with leakage if they ran at 90°C. Since TDP is more marketable than max operation temperature, they choose to limit the temperature to produce a more appealing TDP value for the spec sheet and sales blurb.

Another factor is the placement of the temperature sensor. Intel's package specification for Sandy bridge (also 32nm SOI) is 72.6°C but you can find loads of info around the web saying that Tcore can run all day at 90°C but should never exceed 95°C. That's because the temperature sensor embedded in the actual core will always be in a warmer part of the chip than the integrated heat spreader which is rated at 72.6°C. If you want to apply this rule of thumb to AMD, you could add 17°C to the 62°C rating of the 32nm FX chips and call it 79°C.

I susepct the lack of any obvious answers linking to a page from AMD saying "never exceed this value" is because one doesn't exist.
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Re: safe OC temps for a FX-8320

Postposted on Sun Jun 15, 2014 11:24 am

vargis14 wrote:Seriously nobody can tell me safe voltages and temps for a FX-8320 ??

Here's a simple FACT for you: ANY temperature and voltage (using stock BIOS firmware) is the "safe" one as long as your system is stable :roll: There's no scientific proof that, for example, at a certain temperature the particular CPU model will "lose" a certain amount of its overall lifespan (it might or it might not).

Chrispy_ wrote:the lack of any obvious answers linking to a page from AMD saying "never exceed this value" is because one doesn't exist.

Exactly. The warranty will cover any damage anyway except the very obvious physical damage.
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Re: safe OC temps for a FX-8320

Postposted on Sun Jun 15, 2014 7:03 pm

Thanks for the replies
Guys I will update you on temps when he gets that tx4 cooler
2600k HT on@4705mhz 8gb Cas9 1600 mem 2x EVGA GTX770 4gb Classified cards in SLI @1320 mhz core and 2003 mhz mem,mounted in CM HAF922 with a TX-850 PSU 2xHTPC's 2xi3 2120 3.3ghz dual core,1xasus LP HD6570 1xHIS hd7750@1150core1325mem,55"PanyVT30
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Re: safe OC temps for a FX-8320

Postposted on Tue Jun 17, 2014 10:05 am

Yeah, it was probably a good idea to skip the TX3. TBH it is a *fantastic* retrofit cooler if you're planning to run stock, since it is cheap, reliable, much quieter than the retail HSF, and uses the existing mounting bracket. But it isn't really designed with OCing in mind.

JohnC wrote:Here's a simple FACT for you: ANY temperature and voltage (using stock BIOS firmware) is the "safe" one as long as your system is stable :roll:

Blanket pronouncements like this are almost always wrong. :lol:

That said, my anecdotal experiences -- dozens of systems going back a decade and a half, including systems where the CPU fans failed (got my Phenom 9550 up to 100C, no idea how long it ran like that before I noticed or why the thermal shutdown did not kick in), and a sizable Folding@home farm stuffed into a really hot closet -- do seem to indicate that AMD CPUs can take a fair bit of abuse. As long as you're not doing something monumentally stupid the CPU probably has a very good chance of outlasting the system it is in. That poor abused 9550 still runs 100% stable to this day (the server it is in was last rebooted 701 days ago!), and has outlived the original motherboard and PSU in that system as well.
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Re: safe OC temps for a FX-8320

Postposted on Tue Jun 17, 2014 3:28 pm

The abuse level a chip can handle is based on what it's made out of and what process it's made on.

In AMD's case it's 32nm SOI which has proved to be very voltage and heat-tolerant so far.
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Re: safe OC temps for a FX-8320

Postposted on Tue Jun 17, 2014 4:17 pm

Just for reference:

FX8320 @ 4.2ghz / 1.25v
Cinebench score : 7.24

Dont have the max temp, but I used a corsair H100 (tiger had them for $49) and the fan never go above 700 rpm.. well not never, if prime95 runs long enough it spin up a little. hard to tell because its still almost completely silent.

Having said that, your #1 place of concern should be the voltage regulators temp . You can really put some voltage on those chips, and they will gladly take it.
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