Help understanding B350 PCIe configuration

rajivnairr

Prominent
Mar 20, 2017
2
0
510
Hello Everyone,

Glad to be a part of this wonderful community.

I have a query about the a PC which I recently built based on the new AMD Ryzen Processor and AM4 B350 chipset. I am currently using a RX 480 graphics card and intend to buy a second (probably RX 580) in the near future to setup a crossfire.

As I was reviewing the motherboard user manual, I got confused with the PCIe configuration, bandwidth & speeds when using a second card.

Can someone please help me decipher the documentation so that I can make a smarter decision regarding crossfire ?

The board that I am using in my PC is an Asus Prime B350-Plus

A summary of the PCIe configuration that I could get from the manual is as follows:

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I would like to know the following:

1. At what speed would the second card run and any potential performance impacts ?
2. Would I lose the use of any other slots/ports on my motherboard if I crossfire ?

Thanks in advance.

Regards,
Rajiv
 

rajivnairr

Prominent
Mar 20, 2017
2
0
510


Hi,

Thanks for summarizing it for me, makes more sense now.

As it is clearer, does it make sense for me to crossfire on this motherboard or should I probably look to upgrade to a X370 chipset in the future for crossfire ?

I will be using my current RX 480 in this slot and would ensure that I do not use PCIeX1_1 and PCIeX1_2. Would there be a performance impact because of the PCIe bandwidth bottleneck in the second slot?

Regards,
Rajiv
 

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