Some flickering occurred sometimes while I am playing AoEo. Therefore I checked my hardware and within the catalyst control center the graphic bus is shown as:
PCI Express 2.0, PCI Express 2.0 x16.
My graphics card is a Saphire Radeon HD 7770 series witch should support PCI Express 3.0.
Could anyone give me some information what is running wrong? I’ve updated all drivers and checked all settings within the Bios, windows and graphics card.
Thanks in advance 
Rwing
Graphics Card
Saphire AMD Radeon HD 7700 Ghz edition, vapor-x
PCI Express 2.0
PCI Express 2.0 x16
Biosvers. 015.020.000.000
Biosdate 2012/05/02
Catalyst Control Center-Version: 2012.0928.1532.26058
The version before: I do not know
No OC has been done. There are just vendor settings
Power Supply : Be-quiet 500 W
Motherboard or System Make & Model
Mainboard : ASRock Z68 Extreme3 Gen3
System BIOS : 63-0100-000001-00101111-082311-Chipset
System BIOS : AMI (OEM) P1.30 11/22/2011
Intel vPro : 7.01.10.1065
Gesamtspeicher : 7.91GB DIMM DDR3
Modell : ASRock Core (Sandy Bridge) DRAM Controller
OEM Gerätename : Intel Core (Sandy Bridge) DRAM Controller
Display Device(s) and Connection(s) Used
LG: L227W
Prozessor : Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz (4C 4.59GHz/6GHz, 4.6GHz IMC, 2x 256kB L2, 6MB L3)
Additional Hardware
ADATA SSD S511 120GB (100GB, RAID0/SATA600, SCSI-4, SSD) : 93GB (C
SAMSUNG SP2504C (250GB, SATA300, 3.5", 7200rpm, 8MB Cache) : 233GB (D
(E
(G
System Memory Type & Amount
memorycontroller : ASRock Core (Sandy Bridge) DRAM Controller 100MHz, 2x 4GB DIMM DDR3 1.87GHz/1.33GHz 128-bit
Speichermodul : G.Skill F3-14900CL9-4GBSR 4GB DIMM DDR3 PC3-14900U DDR3-1866 (11-11-11-29 5-40-13-6)
Windows: Microsoft Windows 7 Ultimate 6.01.7601 (Service Pack 1) : x64
Graphics: AMD Radeon HD 7700 Series (10CU 640SP SM5.0 1.1GHz/1GHz 10% OC, 1GB DDR5 5.2GHz 128-bit, PCIe 2.00 x16)
Bus 1
Type : PCIe 2.00 x16 5Gbps
Multiplication : 3x
Bridge : Intel Core (Sandy Bridge) PCI Express Root Port
Gerät: PC Partner Cape Verde [Radeon HD 7700 Series]
Other grafic : Bus 0, Gerät 2, Funktion 0
Windows name : Intel(R) HD Graphics 3000
OEM enginename : Intel Core (Sandy Bridge) Integrated Graphics Controller (GT2)
OEM Hardware Nr. : VEN_8086, DEV_0112, REV_09
Enginename : ASRock Core (Sandy Bridge) Integrated Graphics Controller (GT2)
Produkt Nr. : VEN_1849, DEV_0112, REV_09
Revision : A10