How to my second 680gtx in pci-e 3.0?

Xipe · *Last edited by Xipe; 04-30-2012 at 14:18.*

I have this pc:
Corsair AX1200W
i7 3930K C2 @ 4,6 HT ON 1,36v
Corsair H80
Asus Rampage IV Extreme
16Gbs GSKILL 17000 RipjawsZ (2133mhz) 9-11-10-28 1.65v
SLI 680GTX (MSI+ASUS)
X-Fi Titanium Pro Fatal1ty
SSD OCZ Vertex 3 120gbs
HDD Velociraptor 150gbs
HDD Maxtor 240gbs
ASUS VG236H

I can put asus card in pci-e 3.0 with a fix of the regedit (create dword value, 0004 etc) but i cant put in my second gpu, the msi. Its imposible. i dont found the way. now i have asus in pci-e 3.0 and msi 2.0.

PD:Sorry for my english.

kcuestag · 04-30-2012, 14:32 | posts: 539 | Location: Spain

You should do it the same way you did it for the 1st GPU.

Either ways, as long as both cards run at 16x (PCIe 2.0) it will not bottleneck them.

Xipe · 04-30-2012, 14:41 | posts: 20 | Location: Bilbao

But i dont found the other graphic.
http://i.imgur.com/2Xqoi.png
I only see one graphics card.

---TK--- · *Last edited by ---TK---; 04-30-2012 at 17:37.*

enable sli? you only see 1 card in device manager?

nick0323 · 04-30-2012, 15:59 | posts: 393 | Location: Old England

PCI-E 2.0 when using SLI according to your manufacturers website otherwise PCI-E 3.0 for a single GPU.

nick0323 · 04-30-2012, 16:05 | posts: 393 | Location: Old England

Duplicate post.

xaudiox · 04-30-2012, 16:40 | posts: 145 | Location: UK

Quote:

Originally Posted by kcuestag

You should do it the same way you did it for the 1st GPU.

Either ways, as long as both cards run at 16x (PCIe 2.0) it will not bottleneck them.

No current GPU will bottleneck @ 8x PCIe 2.0 nevermind 16x.
Maybe in the future but not now.

nizzen · 04-30-2012, 17:36 | posts: 162

Quote:

Originally Posted by xaudiox

No current GPU will bottleneck @ 8x PCIe 2.0 nevermind 16x.
Maybe in the future but not now.

Read this

Callsign_Vega @ xtremesystems proved it otherwise in SLI

http://www.xtremesystems.org/forums/...ion-2012/page6

kcuestag · 04-30-2012, 18:11 | posts: 539 | Location: Spain

Quote:

Originally Posted by xaudiox

No current GPU will bottleneck @ 8x PCIe 2.0 nevermind 16x.
Maybe in the future but not now.

I actually did some testing on GTX680 SLI and PCIe 2.0 @ x8 does bottleneck the GTX680 SLI by about ~4%.

It's a really small difference but it's still there, however PCIe 2.0 @ x16 does not bottleneck them at all on SLI, only on 3 and 4 cards and huge resolutions, anything below 2560x1600 for 2 GTX680's at PCIe 2.0 x16 and bottleneck is none.

nizzen · 04-30-2012, 18:45 | posts: 162

Quote:

Originally Posted by kcuestag

I actually did some testing on GTX680 SLI and PCIe 2.0 @ x8 does bottleneck the GTX680 SLI by about ~4%.

It's a really small difference but it's still there, however PCIe 2.0 @ x16 does not bottleneck them at all on SLI, only on 3 and 4 cards and huge resolutions, anything below 2560x1600 for 2 GTX680's at PCIe 2.0 x16 and bottleneck is none.

2x680 SLI
Bottleneck in 1080p in Bf3

It is not big but it is there ....
http://www.xtremesystems.org/forums/...=1#post5082272

kcuestag · *Last edited by kcuestag; 04-30-2012 at 18:49.*

Quote:

Originally Posted by nizzen

2x680 SLI
Bottleneck in 1080p in Bf3

It is not big but it is there ....
http://www.xtremesystems.org/forums/...=1#post5082272

Not even a 1%...

Edit:

Not to mention it's measured in Multiplayer which is really hard to compare as you will NEVER see the same situation and same performance in the same place on different rounds.

I tested this with a friend's rig with i7 3960X @ 5GHz and PCIe 3.0 against my i7 2600k @ 5GHZ and PCIe 2.0 16x-16x and bottleneck was none.

nizzen · 04-30-2012, 18:59 | posts: 162

Do not shoot the messenger...

You can do a "proper" test yoursef, and then post with you're result

kcuestag · 04-30-2012, 19:01 | posts: 539 | Location: Spain

Quote:

Originally Posted by nizzen

Do not shoot the messenger...

You can do a "proper" test yoursef, and then post with you're result

Not shooting you, just saying those tests that user did are quite unreliable since they're done on Multiplayer, where you can get 90fps in first round and 2nd try can give you 110fps... You will never see the same scenario in a Multiplayer game.

nuhi1 · 04-30-2012, 20:16 | posts: 1

Xipe, I was wondering the same thing. The way to do it in my case was to actually disable SLI, then the new registry key will appear, just do it the same as for the first card then.
(if it's not there, try rebooting once with SLI disabled)
Btw I noticed that my second card drops to PCIx3.0 1.1 when idle, it ramps up to 3.0 when used.

Xipe · 05-01-2012, 04:41 | posts: 20 | Location: Bilbao

Thanks. I disabled the sli and then appears. Thanks.

Now my 2 680gtx in pci-e 3.0.

pokerapar88 · 05-04-2012, 16:02 | posts: 1,526 | Location: Argentina // Buenos Aires

Quote:

Originally Posted by kcuestag

Not even a 1%...

Edit:

Not to mention it's measured in Multiplayer which is really hard to compare as you will NEVER see the same situation and same performance in the same place on different rounds.

I tested this with a friend's rig with i7 3960X @ 5GHz and PCIe 3.0 against my i7 2600k @ 5GHZ and PCIe 2.0 16x-16x and bottleneck was none.

Edit: don't mind that, just saw your mobo has NF200 chip

kcuestag · 05-04-2012, 16:18 | posts: 539 | Location: Spain

Quote:

Originally Posted by pokerapar88

Edit: don't mind that, just saw your mobo has NF200 chip

Yeah.

pokerapar88 · 05-04-2012, 16:21 | posts: 1,526 | Location: Argentina // Buenos Aires

Quote:

Originally Posted by kcuestag

Yeah.

Anyway i really don't believe it is worth it. I'm running @8x and it is fluid and stutter free. I really don't believe there would be much of a difference except if you go trifire or 3 way sli... or ig you have videocards with double the power of a 580 for pci slot. like 2x GTX690s

GhostXL · 05-04-2012, 16:22 | posts: 4,921 | Location: PA, USA

If you do not have an ivy-bridge chip, you cannot run PCI-e 3.0. Even in single card.

Your PCI-e 3.0 slot is running and always will run in 2.0 until they come out witt an ivy-bridge extreme chip to install in your x79.

That apparently will be quarter 4 of this year.

Agent-A01 · 05-04-2012, 16:26 | posts: 5,634 | Location: USA

Quote:

Originally Posted by pokerapar88

Edit: don't mind that, just saw your mobo has NF200 chip

nope not NF200. PLX chip.

GrandMax · 05-04-2012, 17:03 | posts: 191

Quote:

How to my second 680gtx in pci-e 3.0?

That is a nice complete phrase you did there. May I recall that a verb is most often necessary.

nizzen · 05-04-2012, 20:02 | posts: 162

Quote:

Originally Posted by GhostXL

If you do not have an ivy-bridge chip, you cannot run PCI-e 3.0. Even in single card.

Your PCI-e 3.0 slot is running and always will run in 2.0 until they come out witt an ivy-bridge extreme chip to install in your x79.

That apparently will be quarter 4 of this year.

Works with current cpus on x79. Not official, but with the reg fix it WORKS!

But if you do not believe....

pokerapar88 · 05-04-2012, 20:04 | posts: 1,526 | Location: Argentina // Buenos Aires

Quote:

Originally Posted by Agent-A01

nope not NF200. PLX chip.

"Designed for true power users, the P8P67 WS Revolution uses a built-in NF200 controller that enhances bandwidth availability between the board and the four graphics card expansion slots. This is ideal for NVIDIA GeForce SLI™ and AMD CrossFireX™, as the new motherboard can easily handle 2-Way SLI in dual PCI Express X16, while 3-Way SLI works in dual PCI Express X8 and one X16 link. This translates into a 26.4% performance increase compared to regular P67 motherboards with similar SLI configurations, as measured by 3DMark06. For CrossFireX, the P8P67 WS Revolution supports up to quad GPUs builds in PCI Express X8 links, unlike standard motherboards, which lack the bandwidth to do so."

ASUS WEBSITE