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[Official] NVIDIA GTX 780 Ti Owner's Club - Page 997

post #9961 of 16481
Quote:
Originally Posted by muhd86 View Post

the last i heard it did not support 4 way sli gtx 780 .............

Well sir, the GTX780 DOES support 4-way SLI! Unless they disabled that via a driver update, there have been a lot of folks who have run them that way using WHQL drivers. I know that each GTX780 box I had said 4-way SLI capable, and while I still had them, i ran 4-way for some testing, and it worked just fine. There wasn't much gained going to 4-way from tri-sli, certain benchmarks scaled fine, but games didn't. Most games won't utilize the 4th card.


Edit: it appears that after nVidia released the 780Ti they may have stopped allowing 4-way support on the 780's via drivers, the cards themselves will obviously do 4-way sli. Have you tried the "pre-780Ti" drivers from the nVidia website??
Edited by Jimhans1 - 4/16/14 at 10:18am
post #9962 of 16481
Nvidia have always artificially disabled features in drivers to line their pockets. Disabling 4-SLI is just another example.

Same was applied to disable SLI on non-Nvidia motherboard chipsets, until Intel responded with an enormous F-U by not selling them a QPI licence. Magically, SLI then worked on X58 and later chipsets.

Same with virtualization. Device IDs of Quadro/Tesla/Grid cards are white listed in the driver so it agrees to initialise the corresponding cards if it detects it is running virtualized. Change the 2 resistors on the PCB controlling the potential divider that sets the device ID and lo and behold, now a 780Ti shows up as a Quadro K6000 and the driver runs it just fine virtualized (I have two in my virtualized gaming rig, one for each gaming seat).

They only switched to using hard straps on Keplers after the soft-straps in the BIOS were reverse engineered. Until late last year I was running a pair of GTX480 cards BIOS-modded into Quadro 6000s in the same rig.

It's all about persuading the driver to cooperate - very little is actually locked down in hardware.
post #9963 of 16481
Quote:
Originally Posted by Jimhans1 View Post

Well sir, the GTX780 DOES support 4-way SLI! Unless they disabled that via a driver update, there have been a lot of folks who have run them that way using WHQL drivers. I know that each GTX780 box I had said 4-way SLI capable, and while I still had them, i ran 4-way for some testing, and it worked just fine. There wasn't much gained going to 4-way from tri-sli, certain benchmarks scaled fine, but games didn't. Most games won't utilize the 4th card.


Edit: it appears that after nVidia released the 780Ti they may have stopped allowing 4-way support on the 780's via drivers, the cards themselves will obviously do 4-way sli. Have you tried the "pre-780Ti" drivers from the nVidia website??


which drivers are u talking about brother ...the only ones i know of is 314.22 and 320.00 beta with modded inf file ---those are the ones i am testing right now .

if you know of new drivers after these that worked please let me know ---

if i enable the sli option is only sli 2 cards ..that is the strange thing ---t
post #9964 of 16481
Quote:
Originally Posted by muhd86 View Post

which drivers are u talking about brother ...the only ones i know of is 314.22 and 320.00 beta with modded inf file ---those are the ones i am testing right now .

if you know of new drivers after these that worked please let me know ---

if i enable the sli option is only sli 2 cards ..that is the strange thing ---t

If memory serves, it was 314.22, but it's been several months, I honestly can't say for sure, sorry.

Regarding the "only two cards", your motherboard does have at least 4 pcie x8 slots, correct? And you have a good sli bridge? I've had sli bridges cause major problems for me in the past.

Edit: it might have been the 302 drivers from around the Titan release I used??!!
Edited by Jimhans1 - 4/16/14 at 2:25pm
post #9965 of 16481
Try reversing the sli bridge.
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post #9966 of 16481
LOL I just managed to burn an EVGA Geforce 780 Ti Superclocked /ACX that is number 2 within 1 month.

The smell was pretty awful and after inspecting the card closely it seems to be the area I have made a red ring around there kind of popped out:




(Speculation, but by smelling at that specific area it smells strange - The smell kind of filled the whole room, so it was very difficult to pinpoint exactly what broke down, but since I am writing from the computer using the integrated gfx, I guess it is the graphic card again again, though this time there is no 4 beep VGA error code).

The store is REALLYYY going to love me.

I am going to bring in this card instead: ASUS GeForce GTX 780 Ti 3GB DirectCU II OC - I have had nothing but good luck so far with ASUS and as the former owner of the Direct CU II 560/680/780 I guess it is time to test the 780 Ti as well. Hopefully that will last a bit longer.
Edited by Wrathier - 4/16/14 at 4:10pm
post #9967 of 16481
Quote:
Originally Posted by Wrathier View Post

LOL I just managed to burn an EVGA Geforce 780 Ti Superclocked /ACX that is number 2 within 1 month.

The smell was pretty awful and after inspecting the card closely it seems to be the area I have made a red ring around there kind of popped out:




(Speculation, but by smelling at that specific area it smells strange - The smell kind of filled the whole room, so it was very difficult to pinpoint exactly what broke down, but since I am writing from the computer using the integrated gfx, I guess it is the graphic card again again, though this time there is no 4 beep VGA error code).

The store is REALLYYY going to love me.

I am going to bring in this card instead: ASUS GeForce GTX 780 Ti 3GB DirectCU II OC - I have had nothing but good luck so far with ASUS and as the former owner of the Direct CU II 560/680/780 I guess it is time to test the 780 Ti as well. Hopefully that will last a bit longer.


Too bad about your card man! Why not give the Classified a go instead? it has better VRM modules and you have voltage control over core and memory! wink.gif

Cheers

Ed

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post #9968 of 16481
Quote:
Originally Posted by OccamRazor View Post

Too bad about your card man! Why not give the Classified a go instead? it has better VRM modules and you have voltage control over core and memory! wink.gif

Cheers

Ed

(Team skyn3t)

Hey bro,

It's due to my member price, I can get the Asus Direct CU II OC for 121,75 USD less than the classified. That's actually a price difference worth considering.

I am GOLD customer @ webhallen.com so I sometimes can buy surgent things cheaper than other things - if the classified had been good for my member price, I would have bought that.

And since the Asus Direct CU II is already 76,09 USD more expensive than my current ACX, I would have to pay out 197,84 USD to get the classified - that's a huge difference. (1.299,98 SEK to be exact).

Then again I could buy a R290X for much less, but I am a sucker for nVidia cards, so even that I mine for the fun of it, I still prefer to have a very good gamer card ha ha.

Then again I jus checked my member price for a ASUS Radeon R9 290X 4GB DirectCU II OC. - 774,63 USD VS 926,82 USD for the Geforce - Now I am not so sure what to choose frown.gif

- After some more consideration: nVidia all the way smile.gif
Edited by Wrathier - 4/16/14 at 5:35pm
post #9969 of 16481
Quote:
Originally Posted by alancsalt View Post

Try reversing the sli bridge.

Will try a fresh windows install and go from there maybe that helps .

Just re installed the 3 way Sli bridge n wollah it picks up 3 GPU n Sli mode .

I think I need a new window or gtx 780ti n quad sli

Sent from my V5 using Tapatalk
post #9970 of 16481
Hey guys, does anyone know how to get the cards to downclock when idle?
I'm running two 780 Ti's in SLI, watercooled and with Sky's Bios.
But they constantly stay at 1045 mhz, even when not under load.
Any tips?
Same thing goes for my OC'ed 4670k OC'ed CPU, it stays at max voltage constantly.
Tried fiddling with the power options but to no avail.

Thanks!

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