a1solarnova

MSilvis

I just got my Classified HydroCopper I find it odd that I can't go over 1.125 even with +38 mV (at stock max is 1.125 as well).  The card seems average 1150 out of the box max boost and I seem to be game stable at 1267 at that voltage but I find it odd the GPU voltage is so low.  The ASIC is 92.1%.

 
I have exactly the same thing.
 
Mine also does 1150Mhz with the stock bios and over volting does nothing, in fact - not even the classified tool makes any change. Can't really remember if I got it game stable at 1267Mhz. This is what I managed to pull off as best in 3DMark with the stock voltage, need to add though that there was one artifact at the end of first and second test though so not a full pass.

 P12854 with NVIDIA GeForce GTX 780(1x) and Intel Core i5-2500K Processor
Graphics Score
16133
Physics Score
7995
Combined Score
7974
 
I also took the weekend to clean out my case while i was installing my new PSU. This is how it is afterwards, not perfect, but a vast improvement of how it was before with cable management (thank god for modular PSU's!). Now, I'm not really satisfied with the current temps with my case. I might also be going over to water cooling in two months, but before that I'm looking to buy some new fans. It's an Fractal Design R3 which has these possibilities with fans:
Front 2 120mm
Back  1 120mm
Side (not really sure, where that is though) 1 120/140mm
Top 2 120/140mm
Bottom 1 120/140mm

 
Any advice on what to get would be highly appriciated!
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I think some of the higher ASIC cards have lower stock BIOS voltage limits due to the way the gpu uses the voltage. I think they are more efficient and can do more with the lower voltage. I could be completly wrong tough.
My ASIC iss 87.9 (out of the box boost was 1163mhz at 1.162v)and my max voltage is 1.175(+13mv), i can get a game stable 1267mhz(+92mhz) on the core, which from the benchmark thread seems to show that my card can do higher clocks than normal on a lower voltage.
BUT my card does run hot(its on ACX Air), i have yet to change the TIM so i dont know if the hot running is due to bad TIM or just the core itself.  Currently a game of Crysis 3 can get my temps p to 77c with 90% fan speed.

BTW good artifact tests i have found to be the end scene of Unigine Heaven, and a Tera online(of all games lol). I originaly thought through Heaven that a 1280mhz OC was fine, but it was just artificating ever so slightly in Tera, so its down been bumped down 1 step.
I owuld think that you could ether use a custom bios, or use the 1.35v GPu tweeker program floating around to up the votlage that way. I personaly wont bother trying unles i can get my current temps down becouse even if i could increase to 1.2v i highly doubt i could keep it cool.

Spartanjet

I just got my Classified HydroCopper I find it odd that I can't go over 1.125 even with +38 mV (at stock max is 1.125 as well).  The card seems average 1150 out of the box max boost and I seem to be game stable at 1267 at that voltage but I find it odd the GPU voltage is so low.  The ASIC is 92.1%.

a1solarnova

Have you tried changeing TIM ?

jpearson79

trickeh2k

I spent some time this sunday playing around with skyn3t's custom vbios and finally I could play around with the voltage. However, even at low voltages such as 1.200mV the card would become really hot quite fast. In fact, I wasn't even able to play SimCity more than five minutes before the fans where up at 100% struggling to keep the card below 79 degrees even at stock clocks and 1.125mV voltage.

I recently had heat issues with my 780 Classifieds. Highly agree with the suggestions I received about adding a side intake fan or 2 if your case allows for it. I have both of mine bumped to 1.212v and clocked at 1241mhz. After an hour of Crysis 3 my top card max temp was 77C and bottom was high 60's or 70 if I recall from last night. My fans never went above 85%. Prior to adding those 2 fans on the side (and I also had my cpu cooler radiator fans on top as intake fans....bad idea, lol) I was breaking the 80 degree throttle point even while undervolting the cards.

Also @ Killuchen (I can't figure out how to quote multiple replies), I like MX-4 better than Arctic Silver 5, less cure time and easier to apply in my opinion.

jpearson79

killuchen
Ahh thanks! They only have silver 5 locally and I was thinking about doing this on my day off tomorrow. I guess I'll order the Mx-4 off newegg. But I might need to RMA one or both of my cards depending which card or if it's both of them making the rattling noise.

Oh yeah I saw your other post about the rattling noise. My original card had it and I RMA'd it and the replacement is fine. My 2nd card that I got last week makes the noise when the fans rev up and again when they settle down. It isn't the fans making the noise and it isn't typical coil whine noise. I'm planning on just keeping mine, it is less of an issue compared to the card I RMA'd. Some say it has been a common problem with the 780 ACX and Classifieds and goes away over time?