HD-645X-ZQH2
FX-777A-ZDB4
AXR9-380-4GBD5-PPDHE
Basic Info
Brand
XFX
XFX
sapphire
Model
HD-645X-ZQH2
FX-777A-ZDB4
AXR9-380-4GBD5-PPDHE
Interface
Interface
PCI Express 2.1 x16
PCI Express 3.0 x16
PCI Express 3.0
Chipset
Chipset Manufacturer
AMD
AMD
AMD
GPU Series
False
False
AMD Radeon R9 300 Series
GPU
Radeon HD 6450
Radeon HD 7770
Radeon R9 380
Core Clock
650 MHz
1095 MHz
980 MHz
Boost Clock
False
False
False
Shader Clock
False
False
False
CUDA Cores
False
False
False
Stream Processors
160
640
1792
Memory
Effective Memory Clock
1066 MHz
1245 MHz
1475 MHz
Memory Size
1GB
1GB
4GB
Memory Interface
64-Bit
128-Bit
256-Bit
Memory Type
DDR3
GDDR5
GDDR5
3D API
DirectX
DirectX 11
DirectX 11
DirectX 12
OpenGL
OpenGL 4.1
OpenGL 4.2
OpenGL 4.4
Display Connectors
VGA Connection
False
False
False
D-SUB Connection
1
False
1
DVI Connection
1
2
1
1
HDMI Connection
1
1
1
DisplayPort Connection
False
1
False
Multi-Monitor Support
3
False
False
More Details
RAMDAC
400 MHz
400 MHz
False
Max Resolution (Digital)
2560 x 1600
False
4096 x 2160
Max Resolution (Analog)
2048 x 1536
False
4096 x 2160
SLI Support
False
False
False
Cooler
Fanless
With Fan
2 slot Fan sink
Power Connector
False
6-Pin
2 x 6-Pin
Operating Systems Supported
False
False
False
Recommended PSU
400W or greater
450W or greater
False
Dual-Link DVI Supported
1
1
1
HDCP Ready
1
1
1
Eyefinity Support
False
1
1
CrossFireX Support
False
1
1
Virtual Reality Ready
False
False
False
Form Factor & Dimensions
Form Factor
Low Profile Ready
False
ATX
Max GPU Length
False
False
False
Card Dimensions (L x H)
7.13" x 3.19" x 1.1"
8.8" x 4.4" x 1.5"
8.16" x 4.38"
Slot Width
False
False
Dual Slot
