Overclock.net › Forums › Graphics Cards › NVIDIA › GTX 780 V-core throttle
New Posts  All Forums:Forum Nav:

GTX 780 V-core throttle

post #1 of 9
Thread Starter 
Hi guys,i think to have a little problem and would like to have some help....i have a GTX 780 OC to 1124 Mhz but if i dont have my EVGA Precision open with the fan controller ON since my card gets to 80c and 63% fan speed the v-core of my gpu will drop from1.162 to 1.150 and my Clock speed will drop from 1124 Mhz to 1110 Mhz.....And having the fan controller ON allowes me to have my gpu at MAX 77-78C but my fan speed will also bump up to 77% causing more noise....do i have a problem?and if so how can i solve it?
P.S one time happend that my gpu at 80C dropped to 1.012 V-core speed and my Core Clock dropped from 1124 Mhz to 1019 Mhz.....
P.P.s sorry for the bad english but im italian...if i didn't explain my self very well i will try to explain the situation with more details
post #2 of 9
the card is throttling. when a 780 reaches 80 degrees, the card will drop the clock speed and vcore to keep it under 80 degrees. the only solution is to keep the card under 80 degrees.
post #3 of 9
Thread Starter 
Quote:
Originally Posted by gabsonuro View Post

the card is throttling. when a 780 reaches 80 degrees, the card will drop the clock speed and vcore to keep it under 80 degrees. the only solution is to keep the card under 80 degrees.
Yes i kinda noticed that but i also wanted to know why is so low for me,i see pepole with my same card and same v-core getting 1175-1150 Mhz GPU clock.Mine at 1137 it will crash on crysis2(i didn't use any 3DMark testing or artifacts testing,so i don't know if im good to go even know..i just tryed to see if Crysis 2 did or did not crash) And also one more thing...how can i reach higher v-core then 1.162?the only way is to increas the voltage manually?does increas the core voltage make it more stable?....and last thing does increasing the memory clock offset lower the GPU Clock or make the v-core unstable?base Mem clock is 3005 mine is OC to 3251
Thanks for the reply....
post #4 of 9
not all chips are made equal.... some overclock higher than others.
post #5 of 9
Thread Starter 
İt looks like i got the short stick XC......and about the other things i asked do you have any info?
post #6 of 9
You probably have a low-asic gpu that can handle high voltage but will run hot. If you want to overclock it further, you will have to improve the cooling.
Or you could just be really unlucky and have a bad chip that will not overclock no matter how high the voltage is.

Winter is coming, open your window, put the box in front of it and put the fans at 100%. That should cool it enough to let you push it a bit more. Test for the highest overclock and if the card does well you might want to get aftermarket cooler if you ever want to.

Check your warranty policy if you can remove the cooler. You could replace the stock thermal paste. I gained 10C with that, the paste was rock solid hard - very bad quality.
Edited by Just a nickname - 10/26/13 at 3:30pm
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
i7-4790k MSI Z97 Gaming 5 Sapphire R9 290X Tri-X 2x8gb ADATA 2133MHz CL10 
Hard DriveCoolingOSKeyboard
Mushkin 1 TB SSD & Samsung F3 spinpoint 1 TB MCP655A + 2 x MCP320 + EK supreme copper Win10 Corsair K70 Lux 
PowerCaseMouse
Corsair 750W Bitphenix Monstrous water cooling case Logitech G9X 
  hide details  
Reply
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
i7-4790k MSI Z97 Gaming 5 Sapphire R9 290X Tri-X 2x8gb ADATA 2133MHz CL10 
Hard DriveCoolingOSKeyboard
Mushkin 1 TB SSD & Samsung F3 spinpoint 1 TB MCP655A + 2 x MCP320 + EK supreme copper Win10 Corsair K70 Lux 
PowerCaseMouse
Corsair 750W Bitphenix Monstrous water cooling case Logitech G9X 
  hide details  
Reply
post #7 of 9
increasing the memory clock in general will not make up for a lower clockspeed, they both do different things, so clocking one higher will only effect what that thing does and vice versa. A higher memory clock will increase performance when using AA and higher resolutions. I am fairly certain that the 780's vcore is locked (correct me if i am wrong?) and will need to upload a custom bios if it is.
post #8 of 9
Thread Starter 
So now i tryed a bunch of stuff with my card....and even if i set the temp limit of my card at 87C and does not reach that temp it will anyway lower the v-core from1.162 to 1.150 and the Clock speed from 1124 Mhz to 1110 Mhz....im confused wasn't GPU boost 2.0 supposed to lower the clock speed based on your temp??Why it lowers it even if i don't reach the limit?...O.o
About changing the cooler i was thinking to go with Water cooling but i 'm scared of ******* everything up.....maybe i should try to change the termal paste as you suggest...About the v-core being locked is not true you can get max to 1.200 by adding +37 but if it does what is doing now then is useless for me cuz the gpu will lower the v-core to 1.150 anyways(i think so is just an assumption)
Thanks for the answers guys
Edited by KazuyaEWGF - 10/28/13 at 9:23pm
post #9 of 9
Quote:
Originally Posted by KazuyaEWGF View Post

So now i tryed a bunch of stuff with my card....and even if i set the temp limit of my card at 87C and does not reach that temp it will anyway lower the v-core from1.162 to 1.150 and the Clock speed from 1124 Mhz to 1110 Mhz....im confused wasn't GPU boost 2.0 supposed to lower the clock speed based on your temp??Why it lowers it even if i don't reach the limit?...O.o
About changing the cooler i was thinking to go with Water cooling but i 'm scared of ******* everything up.....maybe i should try to change the termal paste as you suggest...About the v-core being locked is not true you can get max to 1.200 by adding +37 but if it does what is doing now then is useless for me cuz the gpu will lower the v-core to 1.150 anyways(i think so is just an assumption)
Thanks for the answers guys

The voltage drop is caused by the circuit load. Every transistor have a resistance, when your gpu uses more transistor (idle to load), the circuit resistance increases which causes voltage drop.

I wouldn`t go for watercooling personally... I would try to first test if you really need a new cooler. If your GPU is not a good clocker, you will spend for a mere increase in performance. You shouldn't watercool for performance but because you like to customise your computer. Watercooling is expensive and is very very time consuming. The performance you get from it is not worth the trouble. It is fun though, hence the reason why you should really like your computer to the point of investing considerable amount of money and time.

Anyway... Looking back and I would just use my air cooler for my computer and an aftermarket cooler for the GPU. Plus you can reuse after market gpu coolers.
Edited by Just a nickname - 10/29/13 at 11:06am
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
i7-4790k MSI Z97 Gaming 5 Sapphire R9 290X Tri-X 2x8gb ADATA 2133MHz CL10 
Hard DriveCoolingOSKeyboard
Mushkin 1 TB SSD & Samsung F3 spinpoint 1 TB MCP655A + 2 x MCP320 + EK supreme copper Win10 Corsair K70 Lux 
PowerCaseMouse
Corsair 750W Bitphenix Monstrous water cooling case Logitech G9X 
  hide details  
Reply
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
i7-4790k MSI Z97 Gaming 5 Sapphire R9 290X Tri-X 2x8gb ADATA 2133MHz CL10 
Hard DriveCoolingOSKeyboard
Mushkin 1 TB SSD & Samsung F3 spinpoint 1 TB MCP655A + 2 x MCP320 + EK supreme copper Win10 Corsair K70 Lux 
PowerCaseMouse
Corsair 750W Bitphenix Monstrous water cooling case Logitech G9X 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: NVIDIA
Overclock.net › Forums › Graphics Cards › NVIDIA › GTX 780 V-core throttle