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 R7 250
CORE STATE
Cape Verde
VRAM
1024 MB
CLOCK SPEED
—
TDP
55 W
BUS WIDTH
128 bit
ARCHITECTURE
GCN 1.0
PROCESS
28 nm
LAUNCH DATE
2013
PERFORMANCE BENCHMARKS
geekbench_opencl
DETAILED SPECIFICATIONS
SPECIFICATION
HD 6770
R7 250
Core Specs
Shading Units
800
512
-36.0%
Shaders
800
512
-36.0%
TMUs
40
32
-20.0%
ROPs
16
16
0.0%
Compute Units
10
8
-20.0%
Clocks
GPU Clock
850 MHz
925 MHz
Memory Clock
1200 MHz
4.8 Gbps effective
900 MHz
1800 Mbps effective
Memory
Memory Size
1024 MB
1024 MB
VRAM (MB)
1,024
1,024
0.0%
Memory Type
GDDR5
DDR3
Memory Bus
128 bit
128 bit
Bandwidth
76.80 GB/s
28.80 GB/s
Cache
L1 Cache
8 KB (per CU)
16 KB (per CU)
L2 Cache
256 KB
256 KB
Performance
Pixel Rate
13.60 GPixel/s
14.80 GPixel/s
Texture Rate
34.00 GTexel/s
29.60 GTexel/s
FP32 (TFLOPS)
1,360.0 GFLOPS
947.2 GFLOPS
FP64 (TFLOPS)
—
59.20 GFLOPS (1:16)
Power
TDP
108 W
55 W
TDP (W)
108
55
-49.1%
Suggested PSU
300 W
250 W
Power Connectors
1x 6-pin
None
Architecture
Architecture
TeraScale 2
GCN 1.0
GPU Name
Juniper
Cape Verde
Generation
Northern Islands
(HD 6700)
Volcanic Islands
(R7 200)
Process Size
40 nm
28 nm
Transistors
1,040 million
1,500 million
Die Size
166 mm²
123 mm²
Foundry
TSMC
TSMC
Density
6.3M / mm²
12.2M / mm²
API Support
DirectX
11.2 (11_0)
12 (11_1)
OpenGL
4.4
4.6
Vulkan
—
1.2.170
OpenCL
1.2
2.1 (1.2)
Shader Model
5.0
6.5 (5.1)
Physical
Slot Width
Dual-slot
Single-slot
Length
198 mm
7.8 inches
168 mm
6.6 inches
Outputs
2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1
1x DVI1x HDMI 1.4a1x DisplayPort 1.2
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Other
Launch Price
129 USD
—
Production
End-of-life
End-of-life
Predecessor
Evergreen
Sea Islands
Successor
Southern Islands
Pirate Islands