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[Official] NVIDIA GTX 780 Ti Owner's Club - Page 937

post #9361 of 16490
Quote:
Originally Posted by gordan View Post

I'm not suggesting aftermarket coolers are no good, I am saying that they aren't much of an improvement as far as cooling capability goes.

I have to disagree with this... rolleyes.gif

I have the PNY OC card, which is a rebadged Palit JetStream 780 Ti. It's a 3 fan card with a large heatsink, and this thing never breaks 70 degrees C even at 1241 MHz with fans on default BIOS curve. This includes Valley, Heaven and several hours of BF4 gaming. With fans at 100% all the time, it never goes over 60...
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post #9362 of 16490
Quote:
Originally Posted by Sheyster View Post

I have to disagree with this... rolleyes.gif

I have the PNY OC card, which is a rebadged Palit JetStream 780 Ti. It's a 3 fan card with a large heatsink, and this thing never breaks 70 degrees C even at 1241 MHz with fans on default BIOS curve. This includes Valley, Heaven and several hours of BF4 gaming. With fans at 100% all the time, it never goes over 60...

You get a decent chip. NOt all chips are like yours, unfortunately..so someone with the exact same card...might have ZERO luck in regards to cooling.


I mean, I look at other cards with similar cooling to mine..I am nearly 20c higher...on both of my cards...

But over the years I have been an enthusiast, I ALWAYS have temps 20c hotter than everyone reports. ALWAYS. NVidia, AMD, brand building the card doesn't matter...

why? Because the air here, and elevation...are different than what everyone else has. As are the cards...and power delivered to them..etc..there are far too many variables here for ANYONE to make ANY claims in ANY direction, honestly. You can only say "worked for me, sorry for your luck", but not "worked for me, you are wrong"...seems a bit aloof and cold.
post #9363 of 16490
Quote:
Originally Posted by cadaveca View Post

You get a decent chip. NOt all chips are like yours, unfortunately..so someone with the exact same card...might have ZERO luck in regards to cooling.


I mean, I look at other cards with similar cooling to mine..I am nearly 20c higher...on both of my cards...

But over the years I have been an enthusiast, I ALWAYS have temps 20c hotter than everyone reports. ALWAYS. NVidia, AMD, brand building the card doesn't matter...

why? Because the air here, and elevation...are different than what everyone else has. As are the cards...and power delivered to them..etc..there are far too many variables here for ANYONE to make ANY claims in ANY direction, honestly. You can only say "worked for me, sorry for your luck", but not "worked for me, you are wrong"...seems a bit aloof and cold.

Did you look into an external water chiller? Didn't realized Edmonton was 440M higher from sea level than Montreal.
    
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post #9364 of 16490
Quote:
Originally Posted by Errorist66 View Post

Did you look into an external water chiller? Didn't realized Edmonton was 440M higher from sea level than Montreal.

Power isn't cheap in Alberta. No provincial sales tax...but definitely not cheap here, so the cost of running a chiller is not worth it. And yes, I do have one. tongue.gif
post #9365 of 16490
Quote:
Originally Posted by gordan View Post

What is your actual goal? If it is anything but minimizing noise, you'd probably do at least as well by just putting a reference heatsink on. And if your card came with the ACX, you can probably pick up a Titan cooler on ebay for a lot less than $110.

Noise is not an issue, I wan't it COOLER. By a whole lot. Water cooling is not an option since I will be transporting it twice a week or so. The MK-26 is big but can take 2x140mm fans that I can run at a very low RPM almost all the time. Right now I can push it to 1300 MHZ mining stable but it get's to about 89 degrees C which is too much with this sort of cooler.

So yeah, I just need to lower the temps by about 20-30 degrees which the MK-26 probably won't have any problems with. Do you have any other suggestions? I will be putting it all in an NZXT H440 to make it easy to transport.
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post #9366 of 16490
Quote:
Originally Posted by gordan View Post

From the pictures I have seen the package is exactly the same as a 690, with 2x8-pin power connectors. ATX spec says the limit on 8-pin auxiliary power is 150W, and limit for the slot power draw is 75W. That puts the total at no more than 375W. Traditionally the card gets limited to about 50W less to make sure it doesn't try to draw too much from the slot for fear of blowing up a marginal motherboard.

So my bet is on the Titan-Z being having standard TDP/power limits set at 325W. Note that this is only 75W more than a standard Titan/780Ti, so even if they cherry-picked the silicon the clock speeds are going to have to be substantially lower to make two uncut GK110 fit within that power envelope.

Not quite... Read my article on PCIe connectors:

"After some doubts were expressed about the PCIe power connectors and the true wattage that can be drawn here is my take on it!

The PCI-E connecter has 6 pins. They are not all used for power. For the 6 pin connector, Pins 1 & 3 are 12V & each can carry 8 Amps. Pin 2 by spec is not connected (but i´ve never seen a PCIe cable with Pin 2 not connected... rolleyes.gif )
Pins 4 & 6 are Com return lines. Pin5 is Com for sensing. Using 2 lines, you get 12V*8A*2= 192Watts, much over the required 75Watts. With an 8 pin PCI-E connector, 2 Com lines are added (4&8) not a 12V & Com. There, Pins 1,2,3 are 12V, Pin 4 is a Com for the 8 pin connector sensing, Pin 5,7,8 are Com return lines, & pin 6 is for the 6 pin connector sensing. Using that config, 12V*8Amp*3=288 Watts, much over the required 150Watts.
There aren't 4 12V pins on the 8 pin connector, only 3, and 2 leads are used for sensing the connector type.

Default specs for PCIe specification 6-pin:




Default specs for PCIe specification 8-pin or 6+2:





BUT, (there is always a but right?tongue.gif )The 12V, 5V, & 3.3V leads are spec'd at #18 gauge, which can carry a max of 10/11 Amps per #18 wire!

So that gives us:

P(W) = I(A) × V(V)
6 Pin: 12V*10A*2= 240 W (But there is 3 12V lines) = 360W
8 Pin: 12V*10A*3= 360 W

MAX theoretical wattage supplied by PCIe lines = 720W


Plus the 75W (again default specs) from the PCIe slot in the motherboard you have a healthy 795W+ for your beast power hungry GK110 card! thumb.gif"



Cheers all

Ed

(Team skyn3t)
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post #9367 of 16490
Need a little help if possible: I flashed my 780 ti with "Gigabyte Windforce F3X
80.80.30.1A" and everything works great except for the voltage. No matter what I do it won't go past 1.087. I was really looking forward to the "1.212" voltage boost, but I can't even change the voltage at all.

Any help is greatly appreciated. Thank you.
post #9368 of 16490
Quote:
Originally Posted by OccamRazor View Post

Not quite... Read my article on PCIe connectors:

"After some doubts were expressed about the PCIe power connectors and the true wattage that can be drawn here is my take on it!

The PCI-E connecter has 6 pins. They are not all used for power. For the 6 pin connector, Pins 1 & 3 are 12V & each can carry 8 Amps. Pin 2 by spec is not connected (but i´ve never seen a PCIe cable with Pin 2 not connected... rolleyes.gif )
Pins 4 & 6 are Com return lines. Pin5 is Com for sensing. Using 2 lines, you get 12V*8A*2= 192Watts, much over the required 75Watts. With an 8 pin PCI-E connector, 2 Com lines are added (4&8) not a 12V & Com. There, Pins 1,2,3 are 12V, Pin 4 is a Com for the 8 pin connector sensing, Pin 5,7,8 are Com return lines, & pin 6 is for the 6 pin connector sensing. Using that config, 12V*8Amp*3=288 Watts, much over the required 150Watts.
There aren't 4 12V pins on the 8 pin connector, only 3, and 2 leads are used for sensing the connector type.

Default specs for PCIe specification 6-pin:




Default specs for PCIe specification 8-pin or 6+2:





BUT, (there is always a but right?tongue.gif )The 12V, 5V, & 3.3V leads are spec'd at #18 gauge, which can carry a max of 10/11 Amps per #18 wire!

So that gives us:

P(W) = I(A) × V(V)
6 Pin: 12V*10A*2= 240 W (But there is 3 12V lines) = 360W
8 Pin: 12V*10A*3= 360 W

MAX theoretical wattage supplied by PCIe lines = 720W


Plus the 75W (again default specs) from the PCIe slot in the motherboard you have a healthy 795W+ for your beast power hungry GK110 card! thumb.gif"



Cheers all

Ed

(Team skyn3t)

That's what the wiring can handle. There is also an issue of what the PSU can handle, and then there are the cases like on most modular PSUs where you have an 8-pin and 6+2-pin on the same cable, where you only have 3 12V lines to the PSU. Since the plug spec is officially 150+150W in that configuration, it's reasonable to stretch that to 350W, but at 700W the magic smoke is liable to start escaping.
post #9369 of 16490
Quote:
Originally Posted by ovard View Post

Noise is not an issue, I wan't it COOLER. By a whole lot. Water cooling is not an option since I will be transporting it twice a week or so. The MK-26 is big but can take 2x140mm fans that I can run at a very low RPM almost all the time. Right now I can push it to 1300 MHZ mining stable but it get's to about 89 degrees C which is too much with this sort of cooler.

So yeah, I just need to lower the temps by about 20-30 degrees which the MK-26 probably won't have any problems with. Do you have any other suggestions? I will be putting it all in an NZXT H440 to make it easy to transport.

89C mining at 1300MHz is shockingly good. As I said, mine is in the 89-95C range depending on ambient temperature during the day with fan set to max out (4200 rpm) at 92C. And at steady state at 120% (300W) TDP limit it generally runs at around 1050-1100MHz. For what little it's worth, what does your ASIC quality come up as? Mine's 76%.
post #9370 of 16490
KK...so I'm thinking about flashing today, but was hoping for some hand-holding, motivating from someone, lol!

First off, I ruined 2 660's by flashing. They were no longer stable @ same OC levels even after flashing back. Why would this be?

I flashed a 780 and was unable to use the official OEM BIOS upgrade tool to flash back to OG as it would not recognize the card/BIOS. Also, the card became unstable @ same OC levels.

DO UNDERSTAND, I'm not insinuating it's the fault of Sky, obviously, that is not the case w/ so many success stories here. So any ideas? I'm super nervous, but getting sick of seeing my core clock bounce around when gaming.
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