Piotrasinski

The cards are all ready in europe.I have bought one in uk

The whole card yeah, but not the stand-alone block.

Crezno do you still have passive heatsinks on the backplate?

crezno

trickeh2k

Can't really figure out my card and the classy overvolting tool. Best bench I was able to pass was at 1293Mhz (1306Mhz passed, but with some artefacts) with 175+ on the mem, although i haven't tried any higher with the mem really. However, wasn't game stable.

Voltage is also a bit odd. Adding 0.038 via Precision seems to increase stability, however it never goes higher than 1.125. Once, when I just pushed the card to boost out at 1320Mhz it hit 1.1320 (or something similar) before crashing.

Now, the classy overvolt software... I was told you should adjust the sliders, shut off the computer and then boot up again. However, whenever I'm back in Windows again all the settings have reset to default. What am I missing here?

Not really sure if the overvolting is really interesting since my card seems to run very hot. Even at the fans running at 100% it couldn't keep my card below 79 degrees at 1280Mhz which until that point (about 45mins of playing) seemed like game stable. 

Only way to know what voltage you are really pushing is to use the headers on the video card and a voltmeter.  EVGA sells a probe-it connector to make it easier.  The software stops being accurate on the voltage once you start adding more voltage that normal software will get you.  And also, typically these cards pull more voltage than you set when its at full load. 

79C at 1.35v full fans even at 1300Mhz is pretty normal. Temps probably wont change much if you kept that voltage and raised it to 1400Mhz.

Seems like the average max overclock for these cards is right around the 1400Mhz mark with 1.3v+  I can say from exerience, you should not aim to push past that amount even with a BIOS unlock for 200% power target, if you are not running L2N or some other kind of solution to drop your temps to freezing levels, even at 1.5v there is not much stability to be had without extremely low temps.

With waterblocks and 40C full load, Max stable OC i could reach was about 1446. Didnt seem to change if voltage was 1.3 or 1.5  I ran my TEC unit in the loop and i hit 1500Mhz no problem. Just a little insight.

Yeah, well it's not 1.35mv, that would have been more understandable. If the overvolt tool did work it should have been around 1.21xmV so it still is hot, especially considering card was only running at 1280Mhz at that time. Of course, without a volt meter I can't be too sure, but then again shouldn't the software as gpu-z or precision x be able to read up to 1.212mV?
 
I read over at OCN that high ASIC probably is worse for overclocking your card much. "From what you've said it sounds like your ASIC is high ... high OC's and high temps at lower voltages. Lower ASIC is high OC's and low temps at higher voltages. That's based on my experience with one Classy at 67.1 and the other at 91.1"
 
Seems to be the same with my card having an ASIC of 92.7%. Still running stock BIOS and even before trying the Classy tool, it never reported a higher voltage than 1.125mV. So, it requires low voltage but runs hot. Even at 1.125mV the card reached 79 degrees, although with a much less agressive fan curve that didn't hit 100% until card got around 77-78 degrees.

Hi all.
 
I need all you Classified owners opinion on this vid i made.
http://sdrv.ms/14SQLRg
 
its bassicaly for you to hear the noise of the ACX cooler.
 
The EU EVGA customer service rep iv spoke to by email says it is a little noisier than it should be. But i want more peoples perspective.
If i RMA, ill have to roll the dice on the Silicon lottery again, and ill have to pay to ship it form the UK to germany.
 
My current GPU ASIC is 87.9 and the out of the box clock is 1163mhz at 1.162mv on the core.
 
BTW you might want to wear headphone and turn the volume up to hear it properly, i only have an old SD digital camcorder at my disposal :P

I jave just change my ln2 for this bios what i have find one page 1 :) and one question why my voltage has just incresse from 37 to 60 mv?and im getting 1.21V .why not 1.35v?

I have put +38 on the Precison X voltage control and only see my voltage hit 1.175mv.  So whats the deal ?

Whats the diffrence in the GTX 780 ACX and the GTX 780 Classy ACX? post #9

dxtremefx

Whats the diffrence in the GTX 780 ACX and the GTX 780 Classy ACX? post #9

Classified is a binned card and generally run faster 1137mhz out of the box. They also use a custom PCB, and have an evbot port, and dual bios. If you can afford it get classified you wont regret it.

I have same issue though at different speed. other people have report noise issues aswell. I think if ur rig is quiet enough its sticks out, maybe some people dont hear an issue with theirs or they dont have an issue. but it seems common enough that if i were u, i wouldnt worry about it. Just try setup up a fan profile that skips the fan speeds that cause the rattle/vibration.
 
 I posted a link to a skydrive file of a vid i made. Compare ur noise to that. Here is the link.
http://sdrv.ms/14SQLRg

I too can confirm that I have the same rattling noise. Only detectable at certain speeds though. Exact same noise as above. Kinda large video and really low volume :P

oldmanmax

trickeh2k

a1solarnova

I have put +38 on the Precison X voltage control and only see my voltage hit 1.175mv.  So whats the deal ?

No idea, mine wont budge from 1.125mV according to Precision and GPU-Z, even with +38.

Mine is stuck at 1.187v when set at +38mv. Its incredibly annoying. I can't imagine being stick at 1.125v. Supposedly a custom bios will fix this. I will be trying that out this weekend. I'll let you know how it works out.

 
Yeah, most likely. However, since my card runs too hot even at these low values I will have to wait until the weekend when I pickup my new PSU. It's modular, so I'll get rid of a few cables, will also to better cable management and replace my cpu fan which is mounted the wrong way atm :P But please, report back. Otherwise, just use the classy overvolt tool?

My advice - watercool it.
 
 
Or buy another one and undervolt them for ultimate quiet air cooling 

So what will a GTX 780 Classified boost  to 1380-1480 with Evbot @ 1.30 volts??
 
Thanks,
Mack 4033

What voltage/MHz is safe to say under water is good for 24/7 / gaming use and just for benching before you bring it back down to your normal overclock?  An average answer would be appreciated.

I put a lot of my water cooling observations in the Classified owners thread: http://www.overclock.net/t/1411500/official-evga-classified-owners-club/1330
 
But right now I'm running a pretty stable 1400core @ 1.3 volt. Anything over 1400 requires a lot of extra voltage, and you'll start seeing artifacts around 1436-1450.  Also running skyn3t's custom bios which gives me a 130% power target. Highly recommended.
 
I ran the 2nd highest Valley bench score for a single card earlier (top card being LN2 Titan). Beating out tons of Titans, 780s and SLI 680s. The Classy is just amazing 
http://www.overclock.net/t/1360884/official-top-30-unigine-valley-benchmark-1-0/7480#post_20660204