EVGA 780 TI SC x 2

[deathstalker99]

Hey Guys

My Rig setup is as follows

ASUS Rampage 4 Extreme
Windows 7 Ultimate Edition
3930K I7 running @ 5GHZ
Kingston Hyper x 8GB x 4 @ 2100MHZ
512Kbps x 2 Corsair SSD
1500 Watts Thermaltake PSU
EVGA 780 TI SC x 2

What happens is in idle my first card is running on GPU CLOCK 324MHZ and Voltage 875, the second card is running on 549MHZ and voltage 975. what i dont understand is if i am on idle mode, shouldn't both be running on the same speed. secondly when i start a game lets say watch dogs or any other game the second card is running on GPU CLOCK 1150 and voltage1050, whereas the first card is on 549/975.

Shouldn't the first card be taking the load rather than the second card. I mean that how SLI works right, the first card share the load with the second if it feels that it has been pushed..

Funny thing is when i check the GPU's in CPU-Z
Card No 1 is showing
Core Clocks 324
Memory Clock 324

Card No 2 is showing
Core Clock 549
Memory Clock 3500

I was running EVGA GTX 680 SC SLI for 2.5 years and never faced such issue.

Appreciate your input on this folks..

 

[JR23]

The first thing i'd do is triple check SLI is actually enabled, providing it was I would just use one card at once. Check that they both idle and boost properly on their own and then try them out in both slots just to be really sure all 4 pieces of hardware are functioning correctly and are not faulty. Once that's been established then I would try to find out why they won't work together, starting with software and drivers. Cards running GPU boost 2.0 in SLI don't always have matched clocks, mine always used to run ~40mhz apart on load but clearly there is something bigger wrong if they are ~600mhz apart.

Welcome to OC3D btw, expect incoming posts saying 'GET A NEW PSU' in 3....2....1.....

JR

 

[Dicehunter]

Hey Guys

My Rig setup is as follows

ASUS Rampage 4 Extreme
Windows 7 Ultimate Edition
3930K I7 running @ 5GHZ
Kingston Hyper x 8GB x 4 @ 2100MHZ
512Kbps x 2 Corsair SSD
>>>1500 Watts Thermaltake PSU<<<
EVGA 780 TI SC x 2

What happens is in idle my first card is running on GPU CLOCK 324MHZ and Voltage 875, the second card is running on 549MHZ and voltage 975. what i dont understand is if i am on idle mode, shouldn't both be running on the same speed. secondly when i start a game lets say watch dogs or any other game the second card is running on GPU CLOCK 1150 and voltage1050, whereas the first card is on 549/975.

Shouldn't the first card be taking the load rather than the second card. I mean that how SLI works right, the first card share the load with the second if it feels that it has been pushed..

Funny thing is when i check the GPU's in CPU-Z
Card No 1 is showing
Core Clocks 324
Memory Clock 324

Card No 2 is showing
Core Clock 549
Memory Clock 3500

I was running EVGA GTX 680 SC SLI for 2.5 years and never faced such issue.

Appreciate your input on this folks..

You have ThermlTACKY, That's the main problem....

In all seriousness first check you have SLI enabled in the control panel as JR23 said and if that doesn't work you could always try a fresh install of Nvidia drivers.

Also try another SLI bridge if you have access to one.

 

[deathstalker99]

Firstly i swapped the ports on the mother board. No change. Then swapped the cards no change. Then changed the SLI Bridge no change.

Finally did a clean sweep on the nvidia drivers and evga precision x using perfect uninstaller. Then disconnected the computer from the internet so that when i restart windows does not pick up drivers from the net. Then when to c: programs deleted all nvidia and evga folders clean sweep

Restarted the pc, connected to the internet, download the drivers from geforce.com and the evga stuff and guess what.

Its perfect

GPU CLOCK card 1 324 card 2 324
Voltage card 1 875 card 2 887

------------------

Thank you so much for your help guys. wasn't really happy if it had to do with changing my PSU

The first thing i'd do is triple check SLI is actually enabled, providing it was I would just use one card at once. Check that they both idle and boost properly on their own and then try them out in both slots just to be really sure all 4 pieces of hardware are functioning correctly and are not faulty. Once that's been established then I would try to find out why they won't work together, starting with software and drivers. Cards running GPU boost 2.0 in SLI don't always have matched clocks, mine always used to run ~40mhz apart on load but clearly there is something bigger wrong if they are ~600mhz apart.

Welcome to OC3D btw, expect incoming posts saying 'GET A NEW PSU' in 3....2....1.....

JR

thank you for the assistance. really appreciate it=00=

You have ThermlTACKY, That's the main problem....

In all seriousness first check you have SLI enabled in the control panel as JR23 said and if that doesn't work you could always try a fresh install of Nvidia drivers.

Also try another SLI bridge if you have access to one.

thank you for the assistance. really appreciate it=00=

 

[Dicehunter]

thank you for the assistance. really appreciate it=00=

Happy to help bud, For future reference I wrote out an in depth guide for cleaning Nvidia drivers from your system.

I do this every new driver release and it's never failed me

A Guide To GPU Driver Cleaning Overkill ​

 

[SuB]

(I'd still look into getting that PSU replaced ASAP)

 

[JR23]

thank you for the assistance. really appreciate it=00=

Not a problem and I called the incoming thermaltacky hate. For what it's worth I too would feel much happier with a quality 850watt PSU than a cheaper overkill one. An AX860, RM1000, HX1050, AX1200i or a Seasonic Platinum would be on my wish/needlist.

JR

 

[barnsley]

Look at Seasonic, Coolermaster,Superflower( OEM to EVGA, fantastic PSUs),Silverstone and Corsair for PSUs.

 

[SuB]

I called the incoming thermaltacky hate.

We're preforming a public service dude. Not all 'big brands' represent quality.

Thermaltake is just one of the many examples, Beats, Razor, Creative Recon3D sound cards to name but a few... it's a long list unfortunately they have bigger marketing campaigns and budgets than we are in number so we'll never win.