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 8870M
CORE STATE
Venus
VRAM
2 GB
CLOCK SPEED
775 MHz
TDP
—
BUS WIDTH
128 bit
ARCHITECTURE
GCN 1.0
PROCESS
28 nm
LAUNCH DATE
2013
PERFORMANCE BENCHMARKS
geekbench_opencl
DETAILED SPECIFICATIONS
SPECIFICATION
HD 6770
HD 8870M
Core Specs
Shading Units
800
640
-20.0%
Shaders
800
640
-20.0%
TMUs
40
40
0.0%
ROPs
16
16
0.0%
Compute Units
10
10
0.0%
Clocks
Base Clock
—
725 MHz
Boost Clock
—
775 MHz
GPU Clock
850 MHz
—
Memory Clock
1200 MHz
4.8 Gbps effective
1125 MHz
4.5 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
128 bit
Bandwidth
76.80 GB/s
72.00 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
12.40 GPixel/s
Texture Rate
34.00 GTexel/s
31.00 GTexel/s
FP32 (TFLOPS)
1,360.0 GFLOPS
992.0 GFLOPS
FP64 (TFLOPS)
—
62.00 GFLOPS (1:16)
Power
TDP
108 W
—
TDP (W)
108
—
Suggested PSU
300 W
—
Power Connectors
1x 6-pin
—
Architecture
Architecture
TeraScale 2
GCN 1.0
GPU Name
Juniper
Venus
Generation
Northern Islands
(HD 6700)
Solar System
(HD 8800M)
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
—
Length
198 mm
7.8 inches
—
Outputs
2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1
—
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Other
Launch Price
129 USD
—
Production
End-of-life
End-of-life
Predecessor
Evergreen
London
Successor
Southern Islands
Gem System