If ill put a R9 390 on 8x lane graphics slot will it Impact my performance?

[helpmeimnoob]

pls help Im total noob at this. 

 

I saw on my gpu specifications i need a X16 lane graphics slot (link: http://www.sapphiretech.com/productdetial.asp?pid=C436E37C-8A09-48B6-9F2B-F4AF86E377B6〈=eng) 

i dont really get it. i know there is motherboards with 16x slot and some motherboards have 8x slot or less. 

 

does it mean i have to find a motherboard with x16 lane slot ? or its ok for me to use a singel card on dual x8 

 

for example: asus z97-a (link: https://www.asus.com/Motherboards/Z97A/specifications/)

 

will it open for me the Option to do crossfire in the future without any problems or impact on my performance? 

 

 

please help me understand this.

[PineappleHolidays]

You can use that gpu with that motherboard

 

Yes you will be able to crossfire,

 

I would recommend a 850w psu for crossfire ( you can get awway with a 750 )

 

For a single card, anything above a 500w is fine ( 600w would be ideal )

[helpmeimnoob]

You can use that gpu with that motherboard

 

Yes you will be able to crossfire,

 

I would recommend a 850w psu for crossfire ( you can get awway with a 750 )

 

For a single card, anything above a 500w is fine ( 600w would be ideal )

but for now if i only put a single card in a 8x slot will there be a impact on the performance?

[Sakkura]

With a single card the slot will run at x16. With two cards the lanes will be split with x8 for each slot.

 

x8 is still plenty for current graphics cards anyway.

[PineappleHolidays]

but for now if i only put a single card in a 8x slot will there be a impact on the performance?

A single card will run at 16X, in a 16x slot ( as there is on the motherboard )

[BenR31415]

*snip*

Here is it, as best as i can explain it.

PCIe (Peripheral Component Interconnect express) is the type of slot on a motherboard in which graphics cards plug into. When measuring PCIe lanes, there are two types you need to know about: physical and electrical.

If you have a 16x physical slot, a 1x, 4x, 8x or 16x card will fit in it: in other words, a card with less lanes will fit in a slot with more physical lanes. There are some exceptions to this (such as the ASUS Republic of Gamers series) where the back of the slot is left open to allow for larger cards to fit, for example a 16x card will fit in an 8x physical slot, although it will be limited to 8x bandwith, and these cases are rare.

There are always the same amount or less electrical lanes than physical lanes. In many cases, motherboards (especially in cheaper ones) will have a 16x physical slot, but can only carry 8x bandwith.

 

You may already know this, I'm just saying just in case.

In answer to your original question, an 8x slot will definitely not limit performance of an R9 390, and you could probably get away with a 4x slot if you needed to.