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2-way SLI with Haswell

post #1 of 7
Thread Starter 
From whatever I've heard and read, most ivy bridge mobos support 2-way SLI like this:

16x + 8x

and 3-way SLi like this

16x + 8x + 4x (IIRC) or is it 16x + 8x + 8x?

Anyway, my question is, will Haswell support 2-way SLI in 16x + 16x fashion?

It will have native support for Thunderbolt so shouldn't it be able to handle more bandwidth?
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post #2 of 7
Current 1155 processors support 24 lanes which gives 16x, 8x for SLI and to support tri-sli it needs an onboard controller.

Depends on how many lanes Haswell has - (which is likely to be 40 lanes), it would thus support natively 16x, 16x, 8x (for tri-sli, or 16x, 16x for SLI)

Thunderbolt takes PCI Lanes, so depending on how the motherboard is set up will depend on how many of those lanes are used, or if a separate controller is used.
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post #3 of 7
Thread Starter 
Thanks for the reply.
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post #4 of 7
Quote:
Originally Posted by dbmsts View Post

Thanks for the reply.

Also depends on the mobo as my motherboard (spent half a grand on the darn thing) is capable of 16x 16x but with tri I get 16x 8x 8x. It's all about this chips you get on the board, price will truly tell with the limitations of Haswell this time around, I'm very excited to see how it plays out.
post #5 of 7
Quote:
Originally Posted by appleg33k85 View Post

Current 1155 processors support 24 lanes which gives 16x, 8x for SLI and to support tri-sli it needs an onboard controller.

Depends on how many lanes Haswell has - (which is likely to be 40 lanes), it would thus support natively 16x, 16x, 8x (for tri-sli, or 16x, 16x for SLI)

LGA 1155 chips have 16 PCIe 3.0 lanes off the CPU, so any SLI configuration is going to be x8x8, not x8x16 (unless you have a motherboard with a bridge chip). The other 4 lanes come off the platform controller hub and run at PCIe 2.0 speeds. It is highly likely that Haswell will continue to support 16 lanes off the CPU, same as Ivy and Sandy.
post #6 of 7
Quote:
Originally Posted by Forceman View Post

LGA 1155 chips have 16 PCIe 3.0 lanes off the CPU, so any SLI configuration is going to be x8x8, not x8x16 (unless you have a motherboard with a bridge chip). The other 4 lanes come off the platform controller hub and run at PCIe 2.0 speeds. It is highly likely that Haswell will continue to support 16 lanes off the CPU, same as Ivy and Sandy.

I know I most likely don't NEED it, but I like my Sandy Bridge Extreme with a million lanes. Victory through overkill!!
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post #7 of 7
you can wait for upgrade your whole life... haswell comes... Intel allready has the next gen in their hands working on
LGA 2011 > 40 lanes is more than sufficient.. THATS ENOUGH FOR 10x 7970!!!

even 4x pci-e is enough for cards like 7970.

even some Micro atx b75board for 50 dollar is enough for 690 in sli (4 gpus)
Really why worry
Edited by Arnoud87 - 2/15/13 at 3:08am
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