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post #9941 of 21377
Quote:
Originally Posted by gagac1971 View Post

i need your help guys ,i have
evga gtx 780 classified on air
asus z 87 sabertooth
corsair vengance pro 1866 mhz
i7 4770k 4.6 gssd samsung 840 pro 256 gb rapid mode on
cooler master pro silent 1000w
win 8.1 pro
nvidia driver 334.89
precision x
original bios 80.80.31.01.80 but modded by me whit skynet power target values-slider up yo 130%
problem is when i overclock above 1332 mhz is almost impossible to reach stability.for 1354 mhz i start to apply 1.26v to 1.36v and card will crash every time after 15 seconds.i am trying to play bf4 on that clock.i rise voltage whit classy voltage controler and also whit evbot but is the same thing,card will crash.it seems that i cant go above 1332 mhz but this card i know that can go higher for sure.i cant get it what is the problem.
p.s. doesn't matter if i will put even 1.4v card will crash,mean something is wrong but i cant discover....
1310 mhz i need 1.21V and is rock solid for hours playing bf4 and other games and also benchmarks but above that clock start to complicate a lot....
Your problem is air cooling. Water cooling is needed for maximum overclocks. GK110 scales with temps, under 50C is preferred.
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post #9942 of 21377
ok then you are saying that if i will overclock my card to 1354 mhz and temp during the loud don't pass 78c the problem whit crashes is not voltage or else but tem?
if i will overclock to 1310 mhz tem reaching 70c and card never crash rock solid......
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post #9943 of 21377
Quote:
Originally Posted by Maxincredible52 View Post

I have a laing d5 vario pump on maximum speed and i go res > pump > 360rad > 2x hydro coppers > cpu block > 240 rad > res
my question is what are the benefits of parallel/series? is my pump on setting 5 strong enough for series/parallel? what is recommended on hydro coppers?
hope this is not ot but i havent found anything on the internet...

I am currently looking in to a similar setup from the research I have done and what I have found I would recommend parallel.

Some reading http://www.xtremesystems.org/forums/showthread.php?253337-Actual-influence-of-flow-rate-on-system-temps

Excerpt that made up my mind for me

Graphics Tests:

The graphics stress tests are obviously also influenced by flow rate, and we will see how below. CPU temperature is reported for reference only, since there is very little load on the CPU during intensive graphics (50% on one core, under Furmark).



We see a substantial increase in average GPU temperature from one card to two, ranging from 7.39 °C (calculated in Note 1) for a parallel setup to 7.99 °C for a serial (calculated in Note 2). But while 7 to 8 °C can seem like much, it is also important to remember that the overclock limitation in SLI mode was demonstrated during our initial setup NOT to be temperature related (see note in the above Methodology section).

Finally, note 3 is of particular interest within the framework of this study, because it shows that even at the GPU level, a parallel setup with modern blocks such as those presented here remains a superior solution to serial, as evidenced by a 0.6°C advantage of parallel over serial.
post #9944 of 21377
some min ago i was played bf4 on 1332 mhz and whit 1.24V and the cars crash after 1 hour and temp never passed 72c.....with this f....ing v droop is almost impossible to get certain voltage....about this crash problem is that voltage will not stay on 1.24v she will oscillate on that voltage from there card will crash sometimes because voltage droops from 1.24v to say 1.231v
Edited by gagac1971 - 3/3/14 at 9:18am
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post #9945 of 21377
i has run now valley on 1332 mhz whit 1.246V and was rock solid all of time on gtx 780 classified tem on 70 c now no crashes....
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post #9946 of 21377
Quote:
Originally Posted by gagac1971 View Post

some min ago i was played bf4 on 1332 mhz and whit 1.24V and the cars crash after 1 hour and temp never passed 72c.....with this f....ing v droop is almost impossible to get certain voltage....about this crash problem is that voltage will not stay on 1.24v she will oscillate on that voltage from there card will crash sometimes because voltage droops from 1.24v to say 1.231v

Quote:
Originally Posted by gagac1971 View Post

i has run now valley on 1332 mhz whit 1.246V and was rock solid all of time on gtx 780 classified tem on 70 c now no crashes....

You will get different results with different apps / games. I had a 780 that would do 1,411 in Valley but I couldn't game like that. BF4 is notorious for not playing nice with OCed cards. Just because you can run Valley at 1,332 doesn't mean you can in BF4, FC3 etc.
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post #9947 of 21377
True. I can run Valley at 1280 but BF4 crashes over 1202. None of the benchmarks are reliable stability tests.
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post #9948 of 21377
Quote:
Originally Posted by gagac1971 View Post

i has run now valley on 1332 mhz whit 1.246V and was rock solid all of time on gtx 780 classified tem on 70 c now no crashes....
Valley isn't too demanding. Run Heaven benchmark for 2-4 hours and it'll put a hurting on your card.
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post #9949 of 21377
yep but it seems to me that everything that i run in valley is even more easy to run in bf4,in valley for 1335 mhz i need 1.256v but in bf4 for same clock i need 1.24v.....
Edited by gagac1971 - 3/3/14 at 10:33am
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post #9950 of 21377
I just don't feel comfortable blasting my card with those kinds of volts when I'm on air. frown.gif
Quote:
Originally Posted by DADDYDC650 View Post

Valley isn't too demanding. Run Heaven benchmark for 2-4 hours and it'll put a hurting on your card.

This is definitely true for me. I think it's the Tessalation feature that Heaven has that causes the extra hurt. I think it's a great benchmark for finding a decent OC. As for BF4, I think it's more about EA's optimizations than card stability. I just run stock clocks or +50core +100mem when playing.
Edited by Kold - 3/3/14 at 10:43am
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