Hot!GTX 780 - 1187mv Max Voltage

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Husky_
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Re:GTX 780 - 1187mv Max Voltage 2013/06/01 18:51:49 (permalink)
I am now living in fear as I ordered the EVGA GTX 780 SC from Newegg yesterday, and it will come on Monday.
 
I am afraid that it will have the same problem as you.
 
If so, can I replace it ? :D
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Re:GTX 780 - 1187mv Max Voltage 2013/06/01 19:05:05 (permalink)
So I tried a custom bios and my card is stable at 1202mhz, the problem is I need 1.212mv to do it which brings my load temp from 62C to 71-72C. I lowered voltage a tick to 1.200 and I got minor artifacting. On the stock bios no matter what I do- Valley, OC Scanner, Crysis 3- like the OP, my voltage won't go higher than 1.187. My ASIC is 65%, I'd say my results are consistent with the theories out there on ASIC values; that my card w/ lower ASIC needs moar power and runs hotter re: overclocking. But that still doesn't explain why at stock my voltage doesn't get to 1.2mv. Grounds for replacing through NewEgg or no??

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#32
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Re:GTX 780 - 1187mv Max Voltage 2013/06/01 19:09:09 (permalink)
Are you guys serious right now? No, you cannot replace a card because it doesn't overclock as well as you like.

 
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Re:GTX 780 - 1187mv Max Voltage 2013/06/01 19:19:26 (permalink)
Celeras

Are you guys serious right now? No, you cannot replace a card because it doesn't overclock as well as you like.

 
That's not at all what I am saying. My card can't run at 1.2mv on stock bios and settings as it should, is the issue. I commented on my custom bios experiment because I shouldn't have to rely on custom bios just to get to stock voltage like everyone else.
post edited by jpearson79 - 2013/06/01 19:26:25

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Re:GTX 780 - 1187mv Max Voltage 2013/06/01 19:47:16 (permalink)
jpearson79

So I tried a custom bios and my card is stable at 1202mhz, the problem is I need 1.212mv to do it which brings my load temp from 62C to 71-72C. I lowered voltage a tick to 1.200 and I got minor artifacting. On the stock bios no matter what I do- Valley, OC Scanner, Crysis 3- like the OP, my voltage won't go higher than 1.187. My ASIC is 65%, I'd say my results are consistent with the theories out there on ASIC values; that my card w/ lower ASIC needs moar power and runs hotter re: overclocking. But that still doesn't explain why at stock my voltage doesn't get to 1.2mv. Grounds for replacing through NewEgg or no??


I can confirm my card has the same limitation on my SC ATX. 1.187 is my voltage maximum. 65.5 ASIC.
post edited by zenfoldor - 2013/06/01 19:50:41

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#35
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Re:GTX 780 - 1187mv Max Voltage 2013/06/01 19:52:56 (permalink)
Celeras

Are you guys serious right now? No, you cannot replace a card because it doesn't overclock as well as you like.

Personally, I have 0 intention of doing this. My card works at the advertised speeds and specs, is quiet, and I still can OC it. I have no plans of using water cooling, so the fact I can't go to 1200 for me is no big deal. 
 
But, this doesn't mean I'm not interested in hearing or finding out why it can't when others can.

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Re:GTX 780 - 1187mv Max Voltage 2013/06/01 19:58:06 (permalink)
@OP, if longevity is truly a concern, stable performance at comparably conservative voltage is to your benefit. +Voltage is a primary facilitator of electromigration.

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Re:GTX 780 - 1187mv Max Voltage 2013/06/01 20:00:21 (permalink)
UPDATE: After restart I am still stuck @ 1187 reporting, but am able to hit 1188MHZ stable OC @ +80 GPU Clock offset. I can't get higher than 1188, and bumping the offset much higher crashes any burn or benchmarking program I try to run. I've dialed back down to +78 offset and I'm going to leave it alone(78 was the first interval that showed a clock reduction). That gives me a repeatable 1175mhz stable OC and +300 mem clock seems not to bother the card at all. Not sure what the restart changed....its worth nothing that looking @ how close my voltage is to my clock speed, extrapolating that, the card should run @ 1200mhz with 1200mv were that available on my unit which seems about right for the cards without limits.

So I've noticed that in this thread also:
http://forums.evga.com/tm.aspx?m=1944281
 

 
The number that is maxing out seems to be 1110mhz, 1187nm Voltage.
 
What is it about these particular numbers cause this kind of uniformity in OC limits? Could it be the latest firmware? Since there are workaround bios out now to address this very issue, what's the situation? Just a natural or coincidental card limitation?
 
Any thoughts?
post edited by zenfoldor - 2013/06/01 20:31:49

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Re:GTX 780 - 1187mv Max Voltage 2013/06/01 20:04:38 (permalink)
schulmaster

@OP, if longevity is truly a concern, stable performance at comparably conservative voltage is to your benefit. +Voltage is a primary facilitator of electromigration.

No worries of that on my card, can't get above 1187 without flashing.
 
Could it be a mobo issue, or is the related to the card itself. Seems like since flashing could fix it, this may be something on the card, as I suspect I could achieve higher OC with greater voltage. Temps are fine.
 
Of course, let me say, this is really not VERY important to me(its a good safe gaming OC level imho), since I would probably run my card at my "maximum" settings I have now even if I could OC further, but I am interested in finding out what specific detail causes this seemingly arbitrary voltage max. Just a commonality in manufacturing process?
post edited by zenfoldor - 2013/06/01 20:12:52

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#39
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Re:GTX 780 - 1187mv Max Voltage 2013/06/01 20:46:16 (permalink)
jpearson79

Celeras

Are you guys serious right now? No, you cannot replace a card because it doesn't overclock as well as you like.


That's not at all what I am saying. My card can't run at 1.2mv on stock bios and settings as it should, is the issue. I commented on my custom bios experiment because I shouldn't have to rely on custom bios just to get to stock voltage like everyone else.

 
Exactly, this guy gets it. It's not about being unable to overclock, it's about the fact that Nvidia distros these cards knowing they should be able to do +38mv overvoltage. The fact that some cards out there are NOT doing the factory VID's is troubling. This is not a matter of "his card can run at +130 offset and mine only runs at +129". It's a whole different ballgame.

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#40
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Re:GTX 780 - 1187mv Max Voltage 2013/06/01 21:03:50 (permalink)
Simply put, it is luck of the draw. We can only guarantee the card will perform at the stock advertised specifications. 
Not all GPUs will overclock to the exact same specs, even those from the same batch.
As with all overclocking, your mileage may vary.
It is what many in the industry refer to as the "Silicon Lottery".

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#41
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Re:GTX 780 - 1187mv Max Voltage 2013/06/01 22:25:33 (permalink)
I'm upset mine wont go to 1.21 Gigawatts! Nah in all seriousness no two cards are the same. One card doesn't have the same potential as the other. You buy the card for the advertised specs not what you saw some guy get once. 
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Re:GTX 780 - 1187mv Max Voltage 2013/06/02 08:22:09 (permalink)
EVGATech_ChrisS

Simply put, it is luck of the draw. We can only guarantee the card will perform at the stock advertised specifications. 
Not all GPUs will overclock to the exact same specs, even those from the same batch.
As with all overclocking, your mileage may vary.
It is what many in the industry refer to as the "Silicon Lottery".


Yeah, this is understandable, but this particular issue doesn't seem performance related, it seems as if the bios of some particular cards are limited to 1187mv, despite being capable of 1200mv. I would like to know how the card chooses this upper end, as this mv number does no vary(it seems) between cards, and the cards are reportedly capable of hitting this number with a 3rd party bios.
 
I'm all about the silicon lottery, read my earlier post when I describe this, but this issue seems to repeatable. In other words, all the cards aren't different in this aspect, about half are 1187, half are 1200, and it makes it seem like a bios limitation and not a manufacturing anomaly.

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Re:GTX 780 - 1187mv Max Voltage 2013/06/02 09:40:21 (permalink)
Yep, what zenfoldor said. Not a matter of the silicon lottery for overclocking. All GK110's should be able to do 1200mv regardless of how capable an overclocker they are.
 
But I do appreciate a response from an EVGA official staff.

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#44
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Re:GTX 780 - 1187mv Max Voltage 2013/06/02 12:19:11 (permalink)
How many people have to tell you before you get it? 1.200mv is an overvoltage attained by OVERCLOCKING. Just because it's the theoretical spec-sheet maximum does not mean your card will be capable of it.

 
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#45
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Re:GTX 780 - 1187mv Max Voltage 2013/06/02 13:13:10 (permalink)
Celeras

How many people have to tell you before you get it? 1.200mv is an overvoltage attained by OVERCLOCKING. Just because it's the theoretical spec-sheet maximum does not mean your card will be capable of it.

 
Really? So if I take my 3770k clock it at 3.5Ghz and apply 1.3v to it, that's overclocking? And I got lucky with the silicon lottery that I am allowed to volt my i7 to 1.3v?
 
No. That's not how the "silicon lottery" works.

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#46
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Re:GTX 780 - 1187mv Max Voltage 2013/06/02 13:17:36 (permalink)
well prove it by running a custom bios then in order to force 1,2Vcore?
if it runs stable you got a point if not then the lower voltage is the limit for your card already.
#47
Pathway
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Re:GTX 780 - 1187mv Max Voltage 2013/06/02 13:21:51 (permalink)
Warm gpu's you guys have :P
 

post edited by Pathway - 2013/06/02 13:25:55

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#48
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Re:GTX 780 - 1187mv Max Voltage 2013/06/02 13:51:56 (permalink)
Pathway

Warm gpu's you guys have :P


 
Nice Trickery I bet ya just started the benchmark up without giving it time to warm up

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#49
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Re:GTX 780 - 1187mv Max Voltage 2013/06/02 13:52:57 (permalink)
Highest temp i have seen is in Crysis 3 and that was 51ºC :P

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#50
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Re:GTX 780 - 1187mv Max Voltage 2013/06/02 13:55:10 (permalink)
Pathway

Highest temp i have seen is in Crysis 3 and that was 51ºC :P


Haha. Is that air or water?          

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#51
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Re:GTX 780 - 1187mv Max Voltage 2013/06/02 13:56:56 (permalink)
XrayMan

Pathway

Highest temp i have seen is in Crysis 3 and that was 51ºC :P


Haha. Is that air or water?          

 
Judging by his precision screen he is on water, the Fan speed is way down to minimal

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#52
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Re:GTX 780 - 1187mv Max Voltage 2013/06/02 13:59:30 (permalink)
ofc its water, but im pretty stunned by the performance on 1 x 360 radiator. Pretty good oc on the 780 and 980x @ 4.2ghz at pretty high vcore :)

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#53
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Re:GTX 780 - 1187mv Max Voltage 2013/06/02 15:11:21 (permalink)
I need one of you guys with a stock reference cooled 780 that can do 1200mv to please dump your BIOS and upload it here, or email it to me in an attachment please: darkl3ad3r@gmail.com
 
I refuse to flash an aftermarket, modded BIOS. I am not going to completely void my warranty just for +13mv. But by flashing an official BIOS from the same card all should be fine. And if by flashing a dumped BIOS from a card that does 1200mv, that my card is able to do it as well, then we can put this to rest. If my card is still capped at 1187mv, then we know there's something else far worse at play here.

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#54
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Re:GTX 780 - 1187mv Max Voltage 2013/06/02 15:44:53 (permalink)
I think you have that backwards. If you flash the BIOS and the card remains capped at 1.187 then you know its the silicon in your card just can't handle the extra voltage. If you flash the BIOS and the card now comes up to 1.200v then there may have been an artificial limit in your old BIOS.
 
 
 
 

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Re:GTX 780 - 1187mv Max Voltage 2013/06/02 16:03:01 (permalink)
theonedub

I think you have that backwards. If you flash the BIOS and the card remains capped at 1.187 then you know its the silicon in your card just can't handle the extra voltage. If you flash the BIOS and the card now comes up to 1.200v then there may have been an artificial limit in your old BIOS.





 
I don't know, I reread it and that's exactly what I'm saying lol maybe you misunderstood what I meant by "put this to rest"? I mean that we know it's a BIOS locked issue and not the hardware. And that if by flashing a BIOS from a card that can do 1200mv, my card still won't go higher than 1187mv, then we know it's something much worse than just a BIOS soft cap.

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#56
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Re:GTX 780 - 1187mv Max Voltage 2013/06/02 16:26:30 (permalink)
i have a stock GTX 780, that overclocks like a champ. was getting 170 max on the core offset and 350 on the memory. however my second 780 doesn't do as well. but I'm still being able to push to 150 on core and 200 on memory or else it starts to artifacts.
 
both are OC without any overvoltages. because the amount of money i payed for them. i don't want kill them yet.
 
but i still haven't confirmed if they actually run on 1.2v
i will test that tomorrow.


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Re:GTX 780 - 1187mv Max Voltage 2013/06/02 16:28:30 (permalink)
DaRkL3AD3R

I need one of you guys with a stock reference cooled 780 that can do 1200mv to please dump your BIOS and upload it here, or email it to me in an attachment please: darkl3ad3r@gmail.com

I refuse to flash an aftermarket, modded BIOS. I am not going to completely void my warranty just for +13mv. But by flashing an official BIOS from the same card all should be fine. And if by flashing a dumped BIOS from a card that does 1200mv, that my card is able to do it as well, then we can put this to rest. If my card is still capped at 1187mv, then we know there's something else far worse at play here.

 
You tried updating with the official EVGA bios?? the one they released some days ago?

I had a similar issue with and old GTX 480, just like you, and it was a bios issue, after an EVGA bios update, it seems it fixed the bad flash from the previous one.

Just give it a try, lets hope you fix it.

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#58
zenfoldor
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Re:GTX 780 - 1187mv Max Voltage 2013/06/02 17:11:49 (permalink)
Let me throw a couple of facts in about my particular case:
 
I have flashed from Jacobs thread to the SC ATX 780 firmware and am experiencing this issue. I didn't test this before the flash. If anyone else has flashed this bios and is able to reach 2000mv, then the issue is with my card. Please before confirming, make sure we are discussing the SC ATX 780 version of the new firmware as each version of the card has different firmware files and are not identical.
 
I can run 1188mhz OC @ 1187mv, but my card will not go beyond 1187mv.
 
I suspect that this is a card limitation and I suspect that it is common. However from the benchmark thread, 1188mhz seems to be a good OC for that voltage.
 
Raising my mv over +25 does not affect anything on my card but going below +25 does affect the maximum mv rating.
 
I have backed off my OC a little to improve longevity, and I'm kinda glad I'm not tempted to run my card @ 2kmv for gaming tbh.
 
I'm afraid to enable kboost, I suspect @ +38mv it may force the card beyond acceptable tolerances. I suspect it would just cause a crash, but I would like someone braver than I to +38 kboost their card and see if that does indeed allow 2kmv without a 3rd party firmware flash.
 
A 3rd party firmware flash certainly has the ability to allow the card more mv, the question is, would it be stable. I wouldn't try it though, because I value my warranty and I'm not sure if that would void it.
It is not outside the realm of possibility that this is a common reporting error in Precision or some obscure software or hardware issue from some unforeseen variable that would take in depth investigation to identify(ex: people with red cases and blue buttons always have faster cars than people with blue cases and red buttons).

Anyway, 2 cents.
post edited by zenfoldor - 2013/06/02 17:16:07

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#59
jpearson79
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Re:GTX 780 - 1187mv Max Voltage 2013/06/02 18:10:53 (permalink)
zenfoldor

Let me throw a couple of facts in about my particular case:

I have flashed from Jacobs thread to the SC ATX 780 firmware and am experiencing this issue. I didn't test this before the flash. If anyone else has flashed this bios and is able to reach 2000mv, then the issue is with my card. Please before confirming, make sure we are discussing the SC ATX 780 version of the new firmware as each version of the card has different firmware files and are not identical.

I can run 1188mhz OC @ 1187mv, but my card will not go beyond 1187mv.

 
I flashed my SC ACX with the updated official bios and I can still only top out at 1.187mv. I also tried enabling k-boost, no impact. Your card shouldn't be destroyed by enabling k-boost or adding +38mv.  Oh well. I will get over it. I can't complain if I'm stable at 1150mhz running "only" at 1.187mv rather than 1.2, that's a plus as someone else mentioned. I'd be uncomfortable keeping my 24/7 clocks any higher anyway.  I'm done with this and decided its time to just have fun / game on, I suggest you all do the same as long as your card is clocking in at advertised specs.

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#60
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