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post #11 of 25
Dude, just sell sell and get a 7970.
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post #12 of 25
Thread Starter 
Quote:
Originally Posted by tsm106 View Post

Dude, just sell sell and get a 7970.

That's pretty expensive and I would feel lame having a PCI-E 3.0 card on a board that doesn't support it :/

If I cave, I'll just stick with the 5970 and sound card and not care, lol.
     
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post #13 of 25

Quote:

Originally Posted by TheJesus View Post

Quote:
Originally Posted by Ken1649 View Post




Yes, we meet again and I am glad we don't have to argue "active" over "passive" lol

Back on topic, from x16 to x8 is not a concern even for a dual-GPU 5970 will not be a ble to saturate it @x8.

My concern is, with all the PCIe slots populated, you will not be able to maintain x8/x8/x1. Let's not guessing here. Shoot Asus Tech a ticket for confirmation.

IIRC, one user having your identical boards had issues. I couldn't dig it out from more than 2,000 sub'd threads. This is the recent discussion with one user who has a board with more lanes. Have a look here; http://www.overclock.net/t/1171700/sapphire-trixx-says-pci-e-x4#post_15750675
 

We weren't really arguing about passive versus active since the adapter was already active, lol. Wasn't powered which apparently is an issue for my card.

That's what I've seen around the internet. The issue that I'm not sure is answerable without contacting AMD is if having the 5970 in the first slot will gain benefits simply because its in the higher priority slot. I'm seeing a few emails in my future *sigh*.

According to that thread he didn't really notice a big issue with performance. I feel like it should be able to maintain the lanes, but we'll see if Asus will respond within a year of my email.


PCIe slot order does not matter as the OS only recognize which adapter is the primary rendering card regardless of slot position.

 

As mentioned above from x16 to x8, there's no performance loss. But if you crossfire two cards,  one is running at x8 and the other x4, the disparity will cause stutter or micro-stutter is inevitable. Perfomance hit of 4-6% does not matter in gameplay even in Eyefinity but the stutter will make it unplayable.

 

That's my concern with your motherboard and only ASUS tech will be able to confirm with 100% accuracy, if 3 slots poplulated, it will be x8/x8/x1 or will be defaulted to x8/x4/1. That's what I meant "not clear in the manual".
 

 

 

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post #14 of 25
Quote:
Originally Posted by TheJesus View Post

Well, actually they split to dual x8 slots when populated, but the main concern is whether the 5970 will lose performance when in the bottom slot where it would be at a lower priority.
See, I can understand the performance being about the same or even going down at 1080/1200P. However, this is EyeFinity so its going to utilize the extra horsepower, theoretically at least.
EDIT: Also, I only play BC2/BF3 pretty much so that's all I really want improvement in (BF3 mainly). Interesting that Metro didn't see a gain.

Okay then, not to worry. The order of slot from top to bottom doesn't matter and it for sure won't matter which physical slot the 5970 is in if both options have the same lane count.

If you're going to buy the 5870, I highly recommend you get it from a source where you can return it. My experience tells me that 3rd card for Tri-Fire has very limited value in terms of improving game playability.
    
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post #15 of 25
Thread Starter 
Update from Asus (that was fast).

"Dear Valued Customer,

Thank you for contacting ASUS Customer Service.

My name is ******** and it's my pleasure to help you with your problem.

Please take it easy,the PCIE X4 slot will not share lans with PCIE X16 slots.

Wish you a good day and Happly new year!"

Not sure what the take it easy part was, lol. That clears up the lane question. You all cleared up the slot ordering question. Sounds like I might have to get a 5870 smile.gif We will see when I get all my money and debts cleared thumb.gif

EDIT: Also, I had always thought that the PCIE X16 lanes were always handled separately than the rest of the PCI/PCIE lanes.
Edited by TheJesus - 12/29/11 at 1:11am
     
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post #16 of 25

LOL

 

Don't sound native.

 

Make them confirm with 3 slots populated, it is x8/x8/x1.

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post #17 of 25
Thread Starter 
Quote:
Originally Posted by Ken1649 View Post

LOL

 

Don't sound native.

 

Make them confirm with 3 slots populated, it is x8/x8/x1.


Lol, I was plenty nice and asked a very thorough question.

" I am looking to upgrade to a 5970 and a 5870 in Tri-crossfire using liquid cooling on my Gene-Z motherboard. However, I have seen issues with a sound card in the x4 slot reducing the number of lanes available to the x16 slots (x8 in crossfire). I was wondering if both video cards would see x8 lanes with a sound card in the x4 slot. There was concern over the USB3 controller using a PCI-Express lane and other devices using another one.

Thank you,
********* **********"

He said that the x16 lanes are separate from the x4 slot.

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post #18 of 25
Quote:
Originally Posted by TheJesus View Post

Quote:
Originally Posted by Ken1649 View Post

LOL

 

Don't sound native.

 

Make them confirm with 3 slots populated, it is x8/x8/x1.


Lol, I was plenty nice and asked a very thorough question.

" I am looking to upgrade to a 5970 and a 5870 in Tri-crossfire using liquid cooling on my Gene-Z motherboard. However, I have seen issues with a sound card in the x4 slot reducing the number of lanes available to the x16 slots (x8 in crossfire). I was wondering if both video cards would see x8 lanes with a sound card in the x4 slot. There was concern over the USB3 controller using a PCI-Express lane and other devices using another one.

Thank you,
********* **********"

He said that the x16 lanes are separate from the x4 slot.

Sent from my LG-P999 using Tapatalk

Eh? This board doesn't have a pci express switch for the x4 slot?
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post #19 of 25
Thread Starter 
Quote:
Originally Posted by tsm106 View Post

Quote:
Originally Posted by TheJesus View Post

Quote:
Originally Posted by Ken1649 View Post

LOL

 

Don't sound native.

 

Make them confirm with 3 slots populated, it is x8/x8/x1.


Lol, I was plenty nice and asked a very thorough question.

" I am looking to upgrade to a 5970 and a 5870 in Tri-crossfire using liquid cooling on my Gene-Z motherboard. However, I have seen issues with a sound card in the x4 slot reducing the number of lanes available to the x16 slots (x8 in crossfire). I was wondering if both video cards would see x8 lanes with a sound card in the x4 slot. There was concern over the USB3 controller using a PCI-Express lane and other devices using another one.

Thank you,
********* **********"

He said that the x16 lanes are separate from the x4 slot.

Sent from my LG-P999 using Tapatalk

Eh? This board doesn't have a pci express switch for the x4 slot?

His message seemed to say that the x16 slots' lanes would be unaffected by the x4 being populated. I think this is due to the x16 slots having a separate controller (i.e. On CPU versus Southbridge or something, I always thought that was how it worked since you have to use ivy bridge for pci3 without a change to the Z68's underlying chipset).

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post #20 of 25
Quote:
Originally Posted by TheJesus View Post

Quote:
Originally Posted by tsm106 View Post

Quote:
Originally Posted by TheJesus View Post

Quote:
Originally Posted by Ken1649 View Post

LOL

 

Don't sound native.

 

Make them confirm with 3 slots populated, it is x8/x8/x1.


Lol, I was plenty nice and asked a very thorough question.

" I am looking to upgrade to a 5970 and a 5870 in Tri-crossfire using liquid cooling on my Gene-Z motherboard. However, I have seen issues with a sound card in the x4 slot reducing the number of lanes available to the x16 slots (x8 in crossfire). I was wondering if both video cards would see x8 lanes with a sound card in the x4 slot. There was concern over the USB3 controller using a PCI-Express lane and other devices using another one.

Thank you,
********* **********"

He said that the x16 lanes are separate from the x4 slot.

Sent from my LG-P999 using Tapatalk

Eh? This board doesn't have a pci express switch for the x4 slot?

His message seemed to say that the x16 slots' lanes would be unaffected by the x4 being populated. I think this is due to the x16 slots having a separate controller (i.e. On CPU versus Southbridge or something, I always thought that was how it worked since you have to use ivy bridge for pci3 without a change to the Z68's underlying chipset).

Sent from my LG-P999 using Tapatalk

From the gist of it, Ken's saying it doesn't have a plx switch. The tech support dude seemed to sidestep the question, making it seem like it doesn't. The chipset only has X lanes, so if x16 goes to pcie 1, it needs to be switched to x8, to share x8 with the pcie2. Now if you populate the last slot, well those lanes have to come from somewhere right?

Is the tech saying they are free, magical lanes? Or did he just skirt your question? You know, if my hunch is right, you're already running x4/x4 on your 5970 since the soundcard forces the pcie2 to run x8 to since it's tied to the 3rd slot... hmm?
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