GPU Comparison
RADEON
AMD 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
VS
RADEON
Radeon RX 470
CORE STATE
Ellesmere
VRAM
4 GB
CLOCK SPEED
1206 MHz
TDP
120 W
BUS WIDTH
256 bit
ARCHITECTURE
GCN 4.0
PROCESS
14 nm
LAUNCH DATE
2016
PERFORMANCE BENCHMARKS
geekbench_opencl
3dmark_3dmark_steel_nomad_dx12
geekbench_metal
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
HD 6850 X2
RX 470
Core Specs
Shading Units
960
2,048
+113.3%
Shaders
960
2,048
+113.3%
TMUs
48
128
+166.7%
ROPs
32
32
0.0%
Compute Units
12
32
+166.7%
Clocks
Base Clock
—
926 MHz
Boost Clock
—
1206 MHz
GPU Clock
800 MHz
—
Memory Clock
1050 MHz
4.2 Gbps effective
1650 MHz
6.6 Gbps effective
Memory
Memory Size
2 GB
4 GB
VRAM (MB)
2,048
4,096
+100.0%
Memory Type
GDDR5
GDDR5
Memory Bus
256 bit
256 bit
Bandwidth
134.4 GB/s
211.2 GB/s
Cache
L1 Cache
8 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
2 MB
Performance
Pixel Rate
25.60 GPixel/s
38.59 GPixel/s
Texture Rate
38.40 GTexel/s
154.4 GTexel/s
FP32 (TFLOPS)
1.536 TFLOPS
4.940 TFLOPS
FP64 (TFLOPS)
—
308.7 GFLOPS (1:16)
FP16 (TFLOPS)
—
4.940 TFLOPS (1:1)
Power
TDP
254 W
120 W
TDP (W)
254
120
-52.8%
Suggested PSU
600 W
300 W
Power Connectors
2x 8-pin
1x 6-pin
Architecture
Architecture
TeraScale 2
GCN 4.0
GPU Name
Barts
Ellesmere
Generation
Northern Islands
(HD 6800)
Arctic Islands
(RX 400)
Process Size
40 nm
14 nm
Transistors
1,700 million
5,700 million
Die Size
255 mm²
232 mm²
Foundry
TSMC
GlobalFoundries
Density
6.7M / mm²
24.6M / mm²
API Support
DirectX
11.2 (11_0)
12 (12_0)
OpenGL
4.4
4.6
Vulkan
—
1.3
OpenCL
1.2
2.1
Shader Model
5.0
6.7
Physical
Slot Width
Dual-slot
Dual-slot
Length
—
240 mm
9.4 inches
Height
—
95 mm
3.7 inches
Outputs
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
1x HDMI 2.0b3x DisplayPort 1.4a
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Other
Launch Price
—
179 USD
Production
End-of-life
End-of-life
Predecessor
Evergreen
Pirate Islands
Successor
Southern Islands
Polaris