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[Official] Gigabyte GA-990XA/970A-Series Owners' Club & Help Thread - FX-8350 support added - Page 128

post #1271 of 3278
Mine is a 1.1 usb 3 with an F12 bios, many thanks mezmenir for all the advice, i will try it at ultra and see what happens, if it runs stable with the NBV at 1.3+ then i will post OCCT pics and then throttle back to the 3.9 i am running now, which is still a 1.14ghz oc and nothing to be sniffed at also for the cost of a NB water block and the bits to add it to my loop, i will then run a second bios profile for the stable 4ghz and drop this one back to 3.85ghz and i must upgrade my game card, i am just not sure wether to stay with an nvidia system or change to amd/ati although i know everyone say's 'amd chips work better obviously duuuh' but their are some good single nvidia cards that match up well as sli.

Any recommendations on good match ups for this board, either amd/nvidia 6 series would be welcomed if you have tried any in yours.
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post #1272 of 3278
I had RMA'ed of it at beginning of June - and by this I lost 20 euro by this. [backup equipment cost + sell] [sound card died] right now I have no resources and need to upgrade.

I am happy for that what i have.

4GHz on 6 cores
3GHz on NB

52*C in stress test 20 pass linx stable
tj max 81*C

http://valid.canardpc.com/show_oc.php?id=2519814

Very high voltage. But by default it works at 1.425V

Unfortunatly this mobo boosts voltage by 0.016V per working core so... it is not so bad.

I will not change anything until:

A. OCed Piledriver is faster in all cases than 4GHz Phenom X6
B. Steamrooler is much better than everything.
C. I Win a lottery with at least 300k$ wink.gif
Edited by MRx - 9/22/12 at 4:09pm
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post #1273 of 3278
Quote:
52*C in stress test 20 pass linx stable
tj max 81*C

Core temperature doesn't matter, AMD uses TCase(max) as their thermal limit, which on a 1090T is 62.5C. If your core was showing 52, TCase was probably closer to 65.
Quote:
Very high voltage

That is a ridiculous amount of vcore. Thuban's safe limit on standard cooling is 1.475v as per AMD's datasheets.
Quote:
A. OCed Piledriver is faster in all cases than 4GHz Phenom X6

Hoping this is the case thumb.gif I really want an FX8350 at 5.0
    
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post #1274 of 3278
AMD Datashets says that 1.475 V is maximum safe voltage on BOX cooler.

Due Vboost produced by this mobo (0.08) it is impossible to achieve 4ghz on 1 or 2 cores on lover voltages. (still on 6 core utilization it is stable on lower voltages)

real temp (checked by IR sensor) near CPU is about 55*C
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post #1275 of 3278
Quote:
AMD Datashets says that 1.475 V is maximum safe voltage on BOX cooler.
Air = air, this doesn't affect electron migration damage to the chip from running at 1.56v. Thuban != Deneb.
Quote:
real temp (checked by IR sensor) near CPU is about 55*C
irrelevant as the only way to accurately measure TCase is to cut a notch in the CPU IHS and stick a probe in it. (Even AMDs TCase estimation is pretty bad).
    
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post #1276 of 3278
Ok - electron migration is dependant from temperature. It is all about temperature. Air/Water/Nitrogen - thermal transfer basically is the same - temperatures not.

IR senson - i mean IR probe sensor (that laser thingy whats shows temperature by measurin IR radiation)

BTW. That AMD datashets are mostly wrong, and they have nothing common to the real case scenarios.
Edited by MRx - 9/23/12 at 10:29am
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post #1277 of 3278
Quote:
Ok - electron migration is dependant from temperature. It is all about temperature. Air/Water/Nitrogen - thermal transfer basically is the same - temperatures not.

I didn't say it wasn't, it definitely is. I agree there- but 1.56v on any standard cooling is still bad for Thuban chips. Chilled water or better would be much more feasible.
Quote:
IR senson - i mean IR probe sensor (that laser thingy whats shows temperature by measurin IR radiation)

Curious about this.
Quote:
BTW. That AMD datashets are mostly wrong, and they have nothing common to the real case scenarios.

Even if they are askew, I still trust a bonafied datasheet more than a persons opinion. (No offense by this meant at all).

EDIT: That said, I still push the limits of the datasheets a little myself, I just can't justify recommending someone else do it too. (1.512v for folding)
Edited by mezmenir - 9/23/12 at 11:44am
    
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post #1278 of 3278
Well - I said, that on 2 core utilization i got ~1.52V? That is all about damn vboot on this mobo. (rev 1.0) And it is preety scary.

BTW. Do you know that they are plenty of phenoms, that would survive much more voltage than others?'

I had 1055T - and default voltage for 2.8 was 1.3 V... Each CPU differs with vid. And these with higher voltage will survive higher voltages and temperatures (but they will propably take a bit more power - so the have to work with better cooling than normaly)

Not voltage kills CPU's - density of power and high temperature does that. Better cooling allows increase of temperature gradient - and this one makes possible of runnig CPU on higher voltages.

I have tested thubans to the 1.75 V and still only chip that died in my history was duron 1300 rund without thermal grease tongue.gif [cracked core]
Edited by MRx - 9/23/12 at 4:43pm
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post #1279 of 3278
Quote:
Originally Posted by MRx View Post

Well - I said, that on 2 core utilization i got ~1.52V? That is all about damn vboot on this mobo. (rev 1.0) And it is preety scary.
Honestly, I missed the 2 cores part. How bad is your vboost with a full load like IBT, or was that your CPUZ validation voltage? I know that "Extreme" on my UD3 would give at least 0.200+, it was pretty obscene. Rev 1.0 is a completely different monster, yeh.
Quote:
I had 1055T - and default voltage for 2.8 was 1.3 V... Each CPU differs with vid. And these with higher voltage will survive higher voltages and temperatures (but they will propably take a bit more power - so the have to work with better cooling than normaly)
Same as my 1075(1070)T, very early batch with 136W TDP, 1.3VID and a rather power hungry chip I got frown.gif
Quote:
I have tested thubans to the 1.75 V and still only chip that died in my history was duron 1300 rund without thermal grease [cracked core]
That is a little scary, lol. 1.75? Did it suffer any degrading afterward? What were you cooling it with? My only CPU death thus far was an X2 6400+, though my E5200 is degrading a little, used to run slightly higher but now it needs more vcore.
Quote:
Not voltage kills CPU's - density of power and high temperature does that. Better cooling allows increase of temperature gradient - and this one makes possible of runnig CPU on higher voltages.
Wasn't arguing this, the voltage does tend to make them hotter though. Pretty fast. Like I said, 1.56v on standard cooling. More worried about the temperature resistance than the voltage itself. (Though I have noted a few odd tendencies with my chip and certain volt:clock settings vs. temperatures, these are probably more chip specific).
    
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post #1280 of 3278
Quote:
Originally Posted by mezmenir View Post

Honestly, I missed the 2 cores part. How bad is your vboost with a full load like IBT, or was that your CPUZ validation voltage? I know that "Extreme" on my UD3 would give at least 0.200+, it was pretty obscene. Rev 1.0 is a completely different monster, yeh.
Same as my 1075(1070)T, very early batch with 136W TDP, 1.3VID and a rather power hungry chip I got frown.gif
That is a little scary, lol. 1.75? Did it suffer any degrading afterward? What were you cooling it with? My only CPU death thus far was an X2 6400+, though my E5200 is degrading a little, used to run slightly higher but now it needs more vcore.
Wasn't arguing this, the voltage does tend to make them hotter though. Pretty fast. Like I said, 1.56v on standard cooling. More worried about the temperature resistance than the voltage itself. (Though I have noted a few odd tendencies with my chip and certain volt:clock settings vs. temperatures, these are probably more chip specific).

1. I got 0.016V per utilized core Vboost
2. I was cooling it with Noctua NH-D14 using 5k RPM SanAce Fans [in&out]
3. Yes 1.75V on Air - no cores degradation.

Well - cores still will survive even 24/7 1.6V if you will be able to keep CPU below 55*C. CPU-NB however will degrade quickly after increasing their voltage over 1.5V (3 to 6 months)

Well - these CPU's are not the best. I saw 1090T with standard 1.25V vid voltage... - my own have 1.425 vid voltage... [dammit!]
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