st7777

Sapphire Nitro R9 380 4gb shows pcie 2.0 in pcie 3.0 slot

Discussion created by st7777 on Jan 9, 2016
Latest reply on Jan 11, 2016 by st7777

Hi there,

 

my first time here so here's my 'problem'. I just installed a Sapphire Nitro R9 380 card in the pcie 3.0 slot of my Asus P8Z77-V LX motherboard. I noticed that in the Radeon settings hardware tab on the system page the bus type is PCI Express 3.0 but the current bus setting is PCI Express 2.0 x 16. I installed GPU-Z to double check, and it confirms that the bus runs at pcie 2.0 x 16. Interestingly it shows that the card throttles up from pcie 1.1 to pcie 2.0 under load.

 

My question basically is, is this 'normal' or is there something in the system preventing the R9 380 from achieving pcie 3.0 performance?

 

My system is as follows - MB: Asus P8Z77-V LX, CPU: Intel Core i7-3770 @ 3.4Ghz, RAM 8 GB Corsair Vengeance, PSU Thermaltake Toughpower 700W.

 

Looking forward to hearing what you think, thanks in advance.

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