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AMD FX-9590 Vishera Black Edition- Number of PCI Lanes

Posted on 2014-04-02
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Last Modified: 2014-04-02
Hi team,


I am unable to find specs on what the maximum number of PCI lanes are available in this processor.

I have even check the manufactural website and found no information.


Thank you!
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Question by:Beenardino
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6 Comments
 
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Expert Comment

by:dbrunton
ID: 39973775
I think you mean PCIExpress lanes.

These have nothing to do with the processor but the motherboard.

See http://computer.howstuffworks.com/pci-express1.htm and https://en.wikipedia.org/wiki/PCI_Express#Lane
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Author Comment

by:Beenardino
ID: 39973789
no drunton,


I do mean PCIexpress lanes regarding the processor.

For example the i7-4820k has a maximum of 40 PCI express lanes.

Please view link below for specs. (scroll down to max number of PCI)

http://ark.intel.com/products/77781/Intel-Core-i7-4820K-Processor-10M-Cache-up-to-3_90-GHz

Notice that its 40 which means it can have up to dual x16 and one x8.


I want to know what the max number of PCI lanes is for the vishera mention above.


I hope this clears up some confusion.


I apologize
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LVL 48

Expert Comment

by:dbrunton
ID: 39973806
On AMD CPUs it is the chipset that controls the number of PCIExpress lanes.

On Intel CPUs it is the CPU.  I learn something new every day.

See http://www.enthusiastpc.net/articles/00003/1.aspx for a good article on this topic.
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Author Comment

by:Beenardino
ID: 39973814
so in other words


the AMD depends on the motherboard, but the Intel depend on the CPU max number.

Which would be better for dual-SLI and explain why.

the vishera mention above or the i7-4820k?


thank you and I apologize for making you spin your wheels :(
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Accepted Solution

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dbrunton earned 500 total points
ID: 39973883
>>  thank you and I apologize for making you spin your wheels :(

No problems.  This has corrected some errors in my thinking.

>>  Which would be better for dual-SLI and explain why, the Vishera mention above or the i7-4820k?

Ouch, that is not easy to answer.  In benchmark comparisons the Vishera CPU is faster than the i74820k but in apps where all CPUs are not being utilised the i7482k can be faster - see https://en.wikipedia.org/wiki/Piledriver_%28microarchitecture%29#FX-series.2C_Athlon_and_Opteron

As for SLI I can't say.  If you were looking at SLI motherboards you'd have to check their specifications and make sure the two PCIExpress SLI slots were really x16 lane and not one x16 and one x8 lane.

I can only find this test from three years ago http://www.bjorn3d.com/2011/06/sli-tests-intel-sandy-bridge-vs-amd-phenom-ii/ which compares an Intel versus an AMD motherboard.

Note this conclusion from the link:

Most games currently do not take advantage of more than two cores,so having a quad or six-core processor is really not as important as a processor that is more efficient at data processing and is capable of higher instruction per clock ratio. As our tests show, in many of today’s games, especially those that take advantage of latest DirectX 11 features such as PhysX and Tessellation, the Phenom processors is holding the system back. The greater instruction per clock efficiency on the Sandy Bridge processor allows the system to output as much as 20%.

If the gaming you intend to do doesn't utilise more than three cores I'd say the Intel would be better.
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Author Closing Comment

by:Beenardino
ID: 39973885
Tha k you so much foe your time if i could give you one housand points i would.
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