GPU Comparison
RADEON
AMD Radeon HD 6770
CORE STATE
Juniper
VRAM
1024 MB
CLOCK SPEED
—
TDP
108 W
BUS WIDTH
128 bit
ARCHITECTURE
TeraScale 2
PROCESS
40 nm
LAUNCH DATE
2011
VS
RADEON
Radeon HD 6850 X2
CORE STATE
Barts
VRAM
2 GB
CLOCK SPEED
—
TDP
254 W
BUS WIDTH
256 bit
ARCHITECTURE
TeraScale 2
PROCESS
40 nm
LAUNCH DATE
2011
PERFORMANCE BENCHMARKS
geekbench_opencl
DETAILED SPECIFICATIONS
SPECIFICATION
HD 6770
HD 6850 X2
Core Specs
Shading Units
800
960
+20.0%
Shaders
800
960
+20.0%
TMUs
40
48
+20.0%
ROPs
16
32
+100.0%
Compute Units
10
12
+20.0%
Clocks
GPU Clock
850 MHz
800 MHz
Memory Clock
1200 MHz
4.8 Gbps effective
1050 MHz
4.2 Gbps effective
Memory
Memory Size
1024 MB
2 GB
VRAM (MB)
1,024
2,048
+100.0%
Memory Type
GDDR5
GDDR5
Memory Bus
128 bit
256 bit
Bandwidth
76.80 GB/s
134.4 GB/s
Cache
L1 Cache
8 KB (per CU)
8 KB (per CU)
L2 Cache
256 KB
512 KB
Performance
Pixel Rate
13.60 GPixel/s
25.60 GPixel/s
Texture Rate
34.00 GTexel/s
38.40 GTexel/s
FP32 (TFLOPS)
1,360.0 GFLOPS
1.536 TFLOPS
Power
TDP
108 W
254 W
TDP (W)
108
254
+135.2%
Suggested PSU
300 W
600 W
Power Connectors
1x 6-pin
2x 8-pin
Architecture
Architecture
TeraScale 2
TeraScale 2
GPU Name
Juniper
Barts
Generation
Northern Islands
(HD 6700)
Northern Islands
(HD 6800)
Process Size
40 nm
40 nm
Transistors
1,040 million
1,700 million
Die Size
166 mm²
255 mm²
Foundry
TSMC
TSMC
Density
6.3M / mm²
6.7M / mm²
API Support
DirectX
11.2 (11_0)
11.2 (11_0)
OpenGL
4.4
4.4
OpenCL
1.2
1.2
Shader Model
5.0
5.0
Physical
Slot Width
Dual-slot
Dual-slot
Length
198 mm
7.8 inches
—
Outputs
2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
Bus Interface
PCIe 2.0 x16
PCIe 2.0 x16
Other
Launch Price
129 USD
—
Production
End-of-life
End-of-life
Predecessor
Evergreen
Evergreen
Successor
Southern Islands
Southern Islands