GeForce GTX 670 Doesn't Support 4-way SLI, Possible with Future Driver Update

btarunr · May 14, 2012, 07:20 AM

At the ceremonial pre-launch press briefing (EMEA), we specifically asked NVIDIA if 4-way SLI was a feature supported with GeForce GTX 670. At the time, it seemed like a silly question to ask, since GTX 670 has the same GPU as GTX 680, which supports 4-way SLI, and its reference board is pictured with two SLI bridge connectors. NVIDIA representative's response was in the affirmative (that it does support 4-way SLI). However, post launch, some sites that had four GTX 670 samples to play with, tried getting 4-way SLI numbers for science, to their failure.

Apparently NVIDIA wrote to some tech publications, such as PC Perspective at the last moment before GeForce GTX 670 launch (we didn't receive such a communication), telling them that the GPU does not support 4-way SLI. The email read "As I’m sure you can imagine, we have to QA every feature that we claim support for and this takes a tremendous amount of time/resources. For the GTX 680 and GTX 690, we do support Quad SLI and take the time to QA it, as it makes sense for the extreme OC’ers and ultra-enthusiasts who are shooting to break world records."

PC Perspective wrote back questioning the move to deprive 4-way SLI. "But with the similarities between the GTX 680 and the GTX 670, is there really any QA addition required to enable quad for 670? Seems like a cop-out to me man..." NVIDIA later replied saying that 4-way SLI could be added to GTX 670 in a future driver update. "Change in plans.....we will be offering 4-Way SLI support for GTX 670 in a future driver." NVIDIA realised that it's not the best thing to do, to deprive 4-way SLI support to the GTX 670. Granted, a very tiny minority of enthusiasts use 4-way multi-GPU, but that's no excuse. Seeing as how the GTX 670 2-way SLI is just 2% slower but 20% cheaper than GeForce GTX 690 while being even more energy efficient, we kind of see a commercial motive behind NVIDIA's move. Yet it's welcome news that NVIDIA will correct this with a "future driver update". Let's hope the issue stays hot, till the said driver update is a reality.

Source: PC Perspective

THE_EGG · May 14, 2012, 07:26 AM

Does 3-way SLI work?

Maban · May 14, 2012, 07:31 AM

Quote:

Originally Posted by THE_EGG

Does 3-way SLI work?

Nvidia's site says it does. I haven't come across any reviews though.

btarunr · May 14, 2012, 07:31 AM

Quote:

Originally Posted by THE_EGG

Does 3-way SLI work?

Yes, 3-way SLI works.

MxPhenom 216 · May 14, 2012, 07:31 AM

good read. I plan to run 2 DirectCU II GTX670s in SLI! i cant wait!

hardcore_gamer · May 14, 2012, 07:38 AM

It makes sense. GK104 was originally meant to be 660Ti and 660.

Those who want to set bench-marking records better wait for GK110.

Crap Daddy · May 14, 2012, 07:39 AM

Quote:

Originally Posted by Maban

Nvidia's site says it does. I haven't come across any reviews though.

Try this:

http://www.guru3d.com/article/geforc...ay-sli-review/

Jacez44 · May 14, 2012, 07:41 AM

Quote:

Originally Posted by hardcore_gamer

It makes sense. GK104 was originally meant to be 660Ti and 660.

Those who want to set bench-marking records better wait for GK110.

Lol, what are the chances GK110 will be released this year with GTX 690 selling for 1,100$?

Dj-ElectriC · May 14, 2012, 07:54 AM

GTX670's 3-way SLI lacks a good scaling even at 2560X1600 at most games so... 4-way SLI is just a thing for 3dmark junkies. I think Nvidia will add support later, why shouldn't they after all.

erixx · May 14, 2012, 08:38 AM

then it is a fail......

jihadjoe · May 14, 2012, 09:13 AM

If big kepler was gonna be released this year it would've been GK100 and GTX680 (685?).
The fact that they're calling it GK110 prolly means they're skipping it entirely for this cycle. It'll be out on the refresh, most likely sporting the GTX780 tag (exactly as that leaked slide with Kepler's face said).

hardcore_gamer · May 14, 2012, 09:46 AM

Quote:

Originally Posted by erixx

http://www.techpowerup.com/live/imag...rstone_001.jpg

then it is a fail......

It is not. The SLI connectors are not used in that picture.

RejZoR · May 14, 2012, 09:46 AM

Quote:

Originally Posted by erixx

http://www.techpowerup.com/live/imag...rstone_001.jpg

then it is a fail......

Omfg. I bet lights start to blink in all neighboring houses when you fire up this monstrosity.

Dj-ElectriC · May 14, 2012, 10:12 AM

Yeah. Well at least this PC can find the cure for cancer in like... pfft, 5.5 seconds.

hardcore_gamer · May 14, 2012, 10:44 AM

Quote:

Originally Posted by Dj-ElectriC

Yeah. Well at least this PC can find the cure for cancer in like... pfft, 5.5 seconds.

Unfortunately GK104 sucks at general purpose computing.

THE_EGG · May 14, 2012, 11:28 AM

Quote:

Originally Posted by erixx

http://www.techpowerup.com/live/imag...rstone_001.jpg

then it is a fail......

it isn't. It is quite a win actually, I think that was Silverstone showing off one of their prototype cases and how many gpu's could fit with ample breathing room.

ensabrenoir · May 14, 2012, 11:47 AM

Quote:

Originally Posted by erixx

http://www.techpowerup.com/live/imag...rstone_001.jpg

then it is a fail......

Wwwwwwoooooooooowwwwwww.......
If I wasnt a redeemed happily maried man.......that would be a pin up poster on my wall....

Jurassic1024 · May 14, 2012, 11:57 AM

Quote:

Originally Posted by hardcore_gamer

Unfortunately GK104 sucks at general purpose computing.

That was the trade-off to get the incredible power efficiency. All GeForce cards will have GPGPU gimped.

Jurassic1024 · May 14, 2012, 11:58 AM

Ryan @ PCPER:

The message from NVIDIA was pretty clear cut:

"As I’m sure you can imagine, we have to QA every feature that we claim support for and this takes a tremendous amount of time/resources. For the GTX 680 and GTX 690, we do support Quad SLI and take the time to QA it, as it makes sense for the extreme OC’ers and ultra-enthusiasts who are shooting to break world records."

My reply:
But with the similarities between the GTX 680 and the GTX 670, is there really any QA addition required to enable quad for 670? Seems like a cop-out to me man...

I saw it mostly as a reason to differentiate the GTX 670 and the GTX 680 with a feature since the performance between the cards was very similar; maybe too similar for NVIDIA's tastes with the $100 price difference.

Well this afternoon we received some good news from our contact at NVIDIA:
"Change in plans.....we will be offering 4-Way SLI support for GTX 670 in a future driver."

Jurassic1024 · May 14, 2012, 12:00 PM

Quote:

Originally Posted by jihadjoe

If big kepler was gonna be released this year it would've been GK100 and GTX680 (685?).
The fact that they're calling it GK110 prolly means they're skipping it entirely for this cycle. It'll be out on the refresh, most likely sporting the GTX780 tag (exactly as that leaked slide with Kepler's face said).

GK110 is for Tesla and Quadro cards.

Jurassic1024 · May 14, 2012, 12:01 PM

Quote:

Originally Posted by Dj-ElectriC

GTX670's 3-way SLI lacks a good scaling even at 2560X1600 at most games so... 4-way SLI is just a thing for 3dmark junkies. I think Nvidia will add support later, why shouldn't they after all.

For single display yea, two cards are the sweet spot, but three or more GPU's will benefit multi-monitor setups beautifully.

erixx · May 14, 2012, 12:15 PM

ample breathing room depends more on mobo design... pci-e slots spacing to be precise...

Wow, I just noticed my pc could fit 4x SLI but not 6... Needs an E-ATX mobo...

THE_EGG · May 14, 2012, 01:03 PM

Quote:

Originally Posted by erixx

ample breathing room depends more on mobo design... pci-e slots spacing to be precise...

Wow, I just noticed my pc could fit 4x SLI but not 6... Needs an E-ATX mobo...

This is true, but Silverstone was still showing off how many cards can fit in the case. And AFAIK, there is no mobo out on the market that could support this many cards (well at least consumer level mobos). Also I have NO IDEA why someone would need all the pooowaaaahhhhh.

EDIT: I think I recall Silverstone used ribbon cables, going off of the mobo to connect the GPU's to the mobo. So although spacing of the ports on the mobo is important to 99.99% of us, there are crazy ass extreme enthusiasts that could use ribbon pci-e cables to space out the GPU's accordingly, ensuring they fit in the case.

RejZoR · May 14, 2012, 01:43 PM

I think ASUS had Super Computer mobos with 6+ PCIe slots...

THE_EGG · May 14, 2012, 04:43 PM

Quote:

Originally Posted by RejZoR

I think ASUS had Super Computer mobos with 6+ PCIe slots...

If I had the money I would so buy that just for the bragging rights lol.

May 14, 2012, 07:20 AM	#1
btarunr Editor & Senior Moderator Join Date: Oct 2007 Location: Hyderabad, India Posts: 14,982 (7.30/day) Thanks: 788 Thanked 12,899 Times in 5,650 Posts System Specs	GeForce GTX 670 Doesn't Support 4-way SLI, Possible with Future Driver Update At the ceremonial pre-launch press briefing (EMEA), we specifically asked NVIDIA if 4-way SLI was a feature supported with GeForce GTX 670. At the time, it seemed like a silly question to ask, since GTX 670 has the same GPU as GTX 680, which supports 4-way SLI, and its reference board is pictured with two SLI bridge connectors. NVIDIA representative's response was in the affirmative (that it does support 4-way SLI). However, post launch, some sites that had four GTX 670 samples to play with, tried getting 4-way SLI numbers for science, to their failure. Apparently NVIDIA wrote to some tech publications, such as PC Perspective at the last moment before GeForce GTX 670 launch (we didn't receive such a communication), telling them that the GPU does not support 4-way SLI. The email read "As I’m sure you can imagine, we have to QA every feature that we claim support for and this takes a tremendous amount of time/resources. For the GTX 680 and GTX 690, we do support Quad SLI and take the time to QA it, as it makes sense for the extreme OC’ers and ultra-enthusiasts who are shooting to break world records." PC Perspective wrote back questioning the move to deprive 4-way SLI. "But with the similarities between the GTX 680 and the GTX 670, is there really any QA addition required to enable quad for 670? Seems like a cop-out to me man..." NVIDIA later replied saying that 4-way SLI could be added to GTX 670 in a future driver update. "Change in plans.....we will be offering 4-Way SLI support for GTX 670 in a future driver." NVIDIA realised that it's not the best thing to do, to deprive 4-way SLI support to the GTX 670. Granted, a very tiny minority of enthusiasts use 4-way multi-GPU, but that's no excuse. Seeing as how the GTX 670 2-way SLI is just 2% slower but 20% cheaper than GeForce GTX 690 while being even more energy efficient, we kind of see a commercial motive behind NVIDIA's move. Yet it's welcome news that NVIDIA will correct this with a "future driver update". Let's hope the issue stays hot, till the said driver update is a reality. Source: PC Perspective Last edited by btarunr; May 14, 2012 at 07:35 AM.

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May 14, 2012, 07:26 AM	#2
THE_EGG Join Date: Dec 2011 Location: Gold Coast, Australia Posts: 768 (1.47/day) Thanks: 270 Thanked 180 Times in 116 Posts System Specs	Does 3-way SLI work? __________________ <3 Citroen DS3

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May 14, 2012, 07:31 AM	#5
MxPhenom 216 Knowledgeable Posting Whore Join Date: Aug 2010 Location: Seattle, WA Posts: 5,753 (5.78/day) Thanks: 1,274 Thanked 1,080 Times in 833 Posts System Specs	good read. I plan to run 2 DirectCU II GTX670s in SLI! i cant wait! __________________ Motocross is not just a sport, it's a lifestyle. File Server: Intel Pentium G630, 8GB PNY 1600, AsRock H77M Micro, Corsair CX430M, Vertex 2 90GB (OS), 2x WD Red 2TB in RAID1 “We will never know our full potential, unless we push ourselves to find it. -Travis Rice”

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May 14, 2012, 07:38 AM	#6
hardcore_gamer Join Date: Jan 2011 Location: Fabry Perot cavity,AlGaAs-GaAs Heterojunction Posts: 279 (0.33/day) Thanks: 96 Thanked 119 Times in 58 Posts System Specs	It makes sense. GK104 was originally meant to be 660Ti and 660. Those who want to set bench-marking records better wait for GK110.

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May 14, 2012, 07:54 AM	#9
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May 14, 2012, 08:38 AM	#10
erixx Join Date: Mar 2010 Location: Moorsoldaten barracks Posts: 2,183 (1.89/day) Thanks: 709 Thanked 312 Times in 250 Posts System Specs	then it is a fail......

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May 14, 2012, 09:13 AM	#11
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May 14, 2012, 10:12 AM	#14
Dj-ElectriC Join Date: Aug 2010 Location: Trollithia Posts: 1,580 (1.56/day) Thanks: 141 Thanked 643 Times in 300 Posts System Specs	Yeah. Well at least this PC can find the cure for cancer in like... pfft, 5.5 seconds. __________________ Unreal Tournament mod - 85% progress Sponsored by MSI and Antec Battletag: HolyDiver#1664

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May 14, 2012, 11:58 AM	#19
Jurassic1024 Join Date: Mar 2012 Posts: 163 (0.37/day) Thanks: 4 Thanked 21 Times in 15 Posts System Specs	Ryan @ PCPER: The message from NVIDIA was pretty clear cut: "As I’m sure you can imagine, we have to QA every feature that we claim support for and this takes a tremendous amount of time/resources. For the GTX 680 and GTX 690, we do support Quad SLI and take the time to QA it, as it makes sense for the extreme OC’ers and ultra-enthusiasts who are shooting to break world records." My reply: But with the similarities between the GTX 680 and the GTX 670, is there really any QA addition required to enable quad for 670? Seems like a cop-out to me man... I saw it mostly as a reason to differentiate the GTX 670 and the GTX 680 with a feature since the performance between the cards was very similar; maybe too similar for NVIDIA's tastes with the $100 price difference. Well this afternoon we received some good news from our contact at NVIDIA: "Change in plans.....we will be offering 4-Way SLI support for GTX 670 in a future driver."

May 14, 2012, 12:15 PM	#22
erixx Join Date: Mar 2010 Location: Moorsoldaten barracks Posts: 2,183 (1.89/day) Thanks: 709 Thanked 312 Times in 250 Posts System Specs	ample breathing room depends more on mobo design... pci-e slots spacing to be precise... Wow, I just noticed my pc could fit 4x SLI but not 6... Needs an E-ATX mobo...

May 14, 2012, 01:43 PM	#24
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