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Q6600 Bottleneck A GTX 580? - Page 9

post #81 of 120
I looked into the manual of EVGA's flagship motherboard; the SR-2. It uses dual Xeon and probably two Intel 5520 that lanes but I couldn't see it in the documentation and the components are hidden underneath a huge cooling block. But it seems that it has 34 lanes dedicated for the PCIe slots because the page for PCIe configuration looks like this:

PCIe1 : x16/x8
PCIe2 : x8
PCIe3 : x16/x8
PCIe4 : x8
PCIe5 : x16/x8
PCIe6 : x8
PCIe7 : x16/x8

I interpret this as that slot 1, 3, 5 and 7 can either run 2-way SLI at x16 or 4-way at x8. I take it that the motherboard will automatically detect the cards inserted and adjust the speed accordingly. So for example if I have a 2-way SLI on slot 1, and 3 and insert for example an x8 I/O card in slot 5 or 7 it looks like that the motherboard will reduce the SLI to x8 so as to reserve bandwidth for the I/O card. He11, I suspect that this will happen even with an x1 card inserted to one of these slots! But if I instead use slot 2, 4 or 6 for additional cards then the SLI won't be affected at all.

If the motherboard was a little bit smarter it would instead reserve the bandwidth for each slot from a pool of lanes such that each and every lane is capable of utilizing x1-x16 depending on what the expansion card demands and how many lanes that are available. But maybe that would give rise to higher latency.
    
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post #82 of 120
Quote:
Originally Posted by Track View Post
WRONG!

It's simply WRONG!!

If you can afford Triple-SLi, you should get SR-2, not X58.

Done!
im talking about something different... and its not $$$

track = wise guy of 2011?

yoko. sr-2 got only one 5520 chip, those lines are faked by nf200 chips (two of them)
post #83 of 120
So I suspect that the SR-2 uses the technology from the Skulltrail. It is similar to SAS/SATA port extenders that split physical channels into several logical channels. So even though there are more lanes for the GPUs to play around with, the bandwidth will be the same as in a configuration using only x8 slots and I seriously doubt that this will give any significant increase in performance. This motherboard is likely to choke at the same display resolution / I/O Intensity level as a regular x8 4-way SLI motherboard.

I saw that the LGA2011 socket is coming this autumn. The LGA2011 based chipsets will offer 40 lanes which is not a big increase but the lanes will use the PCIe 3.0 specification which is supposed to be twice as fast as the PCIe 2.0
    
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post #84 of 120
The NF200 still means that 34 "logical" lanes share only 32 physical lanes using some kind of a multiplexer circuitry or "port extender". So it's difficult for me to see that this gives any significant performance increase over a conventional 8x PCIe 4-way SLI setup.


Quote:
Originally Posted by prznar1 View Post
im talking about something different... and its not $$$

track = wise guy of 2011?

yoko. sr-2 got only one 5520 chip, those lines are faked by nf200 chips (two of them)
    
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post #85 of 120
Quote:
Originally Posted by prznar1 View Post
track = wise guy of 2011?
Wow, thank you.
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post #86 of 120
the 2011 lga will have (probably) a 3.0 pci-e that will duble the current bandwidth, that will give a situation where 16x 2.0 = 8x 3.0. and this is the way of improvement. more lines are more $$$, more bandwidth is same/less $$ and more performance
post #87 of 120
Quote:
Originally Posted by Yoko Littner View Post
The NF200 still means that 34 "logical" lanes share only 32 physical lanes using some kind of a multiplexer circuitry or "port extender". So it's difficult for me to see that this gives any significant performance increase over a conventional 8x PCIe 4-way SLI setup.
You really are psychotic.

8x is enough for today's cards. Just like 8x 1.0 was enough for 8800s.

So either SR-2 or P67.

NOTHING ELSE!

If you say anything else, I will come to your house.
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post #88 of 120
Not really sure how 3.0 will improve performance considering a 580 doesn't seem to even max 2.0 x16 or x8?
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post #89 of 120
Come get some kiddo.. it's your call.

Come to my house.. im well equipped to handle a minor threat.

also care to explain how im phycotic?


Quote:
Originally Posted by Track View Post
You really are psychotic.

8x is enough for today's cards. Just like 8x 1.0 was enough for 8800s.

So either SR-2 or P67.

NOTHING ELSE!

If you say anything else, I will come to your house.
    
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post #90 of 120
Quote:
Originally Posted by Yoko Littner View Post
The NF200 still means that 34 "logical" lanes share only 32 physical lanes using some kind of a multiplexer circuitry or "port extender". So it's difficult for me to see that this gives any significant performance increase over a conventional 8x PCIe 4-way SLI setup.
the nf200/plx and lucid chips are quite strange things. those lines might be called faked but tbh those chips are doing something realy funny and good. they are compressing the power impulses, they are giving more data bandwidth per lane. however i dont know how the north bridge is reacting to them. one thing is sure, ocing the nb can give a big gain.
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