AMD R7 250 User Manual

Clicking OK to the memory mismatch error message will restart your computer.
Note: When disabling AMD CrossFireX you will be given the option to restart your
computer to restore the original graphics memory size or continue with the reduced
memory size.
6.1.2.3 Card Reversal Recommended
A recommendation message to reverse the graphics card positions may appear if the
primary graphics card is not installed into the primary PCIe slot. Although
AMD CrossFireX can be enabled, performance may be improved by reversing the
graphics cards in the computer.
See your motherboard's manual to determine which is the primary PCIe slot.
6.1.2.4 3D Client is Active
You will not be able to start AMD CrossFireX if a 3D application, game, or video
playback, such as a DVD movie, is running.
Close all open 3D applications, games, and movie player applications, and then enable
AMD CrossFireX.
6.1.2.5 AMD CrossFireX™ is Currently Unavailable
This error has occurred because AMD CrossFireX did not correctly detect your
graphics hardware or there is a problem with the software.
•
Check that the graphics cards are installed correctly.
•
Check that the interconnect cable, if applicable, is installed correctly.
•
Close all running 3D applications.
•
Check that the AMD CrossFireX mode is set to Software in the Control Center
application. (The AMD Radeon R7 240/R7 250 can only use AMD CrossFireX
technology in software mode.)
•
Reinstall the Control Center software application and drivers.
6.1.2.6 Screen Rotation is Unavailable or Does Not Work
Screen rotation is not an available feature on AMD CrossFireX systems.
6.1.2.7 Video Displays Flicker During System Startup
This is normal during AMD CrossFireX startup.
6.1.2.8 AMD CrossFireX™ Disabled After Swapping/Moving Cards
If you change the AMD CrossFireX configuration by moving the graphics cards to
different slots on the motherboard, disable AMD CrossFireX and restore factory
default settings in the Control Center software application first. Once the cards have
been swapped, enable AMD CrossFireX. This ensures the new configuration is
detected by the computer.
6.1.3 HDTV Adapter Troubleshooting
The following troubleshooting tips may help if you experience problems with HDTV.
Reference 23
© 2014 Advanced Micro Devices, Inc. AMD Radeon™ R7 240/R7 250 Graphics

AMD R7 250 Specifications

General

GPU Architecture	GCN 1.0
GPU Codename	Oland
Process Size	28 nm
Shader Units	384
Shader Model	5.0
Power Consumption	65W
Outputs	DVI, HDMI, DisplayPort
Max. Resolution	4096x2160
Memory Size	1 GB / 2 GB
Memory Type	GDDR5
Memory Bus	128 bit