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 R6 M255DX
CORE STATE
Jet
VRAM
System Shared
CLOCK SPEED
855 MHz
TDP
—
BUS WIDTH
System Shared
ARCHITECTURE
GCN 1.0
PROCESS
28 nm
LAUNCH DATE
2014
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
HD 6770
R6 M255DX
Core Specs
Shading Units
800
320
-60.0%
Shaders
800
320
-60.0%
TMUs
40
20
-50.0%
ROPs
16
8
-50.0%
Compute Units
10
5
-50.0%
Clocks
Base Clock
—
780 MHz
Boost Clock
—
855 MHz
GPU Clock
850 MHz
—
Memory Clock
1200 MHz
4.8 Gbps effective
System Shared
Memory
Memory Size
1024 MB
System Shared
VRAM (MB)
1,024
—
Memory Type
GDDR5
System Shared
Memory Bus
128 bit
System Shared
Bandwidth
76.80 GB/s
System Dependent
Cache
L1 Cache
8 KB (per CU)
16 KB (per CU)
L2 Cache
256 KB
128 KB
Performance
Pixel Rate
13.60 GPixel/s
6.840 GPixel/s
Texture Rate
34.00 GTexel/s
17.10 GTexel/s
FP32 (TFLOPS)
1,360.0 GFLOPS
547.2 GFLOPS
FP64 (TFLOPS)
—
34.20 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
Jet
Generation
Northern Islands
(HD 6700)
Gem System Hybrid
(Rx M200)
Process Size
40 nm
28 nm
Transistors
1,040 million
690 million
Die Size
166 mm²
56 mm²
Foundry
TSMC
TSMC
Density
6.3M / mm²
12.3M / 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
IGP
Length
198 mm
7.8 inches
—
Outputs
2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1
Portable Device Dependent
Bus Interface
PCIe 2.0 x16
IGP
Other
Launch Price
129 USD
—
Production
End-of-life
End-of-life
Predecessor
Evergreen
—
Successor
Southern Islands
—