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 Pro W6800X
CORE STATE
Navi 21
VRAM
32 GB
CLOCK SPEED
2087 MHz
TDP
200 W
BUS WIDTH
256 bit
ARCHITECTURE
RDNA 2.0
PROCESS
7 nm
LAUNCH DATE
2021
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_metal
DETAILED SPECIFICATIONS
SPECIFICATION
HD 6850 X2
Pro W6800X
Core Specs
Shading Units
960
3,840
+300.0%
Shaders
960
3,840
+300.0%
TMUs
48
240
+400.0%
ROPs
32
96
+200.0%
Compute Units
12
60
+400.0%
Clocks
Base Clock
—
1800 MHz
Boost Clock
—
2087 MHz
GPU Clock
800 MHz
—
Memory Clock
1050 MHz
4.2 Gbps effective
2000 MHz
16 Gbps effective
Memory
Memory Size
2 GB
32 GB
VRAM (MB)
2,048
32,768
+1500.0%
Memory Type
GDDR5
GDDR6
Memory Bus
256 bit
256 bit
Bandwidth
134.4 GB/s
512.0 GB/s
Cache
L1 Cache
8 KB (per CU)
128 KB per Array
L2 Cache
512 KB
4 MB
L3 Cache
—
128 MB
L0 Cache
—
32 KB per WGP
Performance
Pixel Rate
25.60 GPixel/s
200.4 GPixel/s
Texture Rate
38.40 GTexel/s
500.9 GTexel/s
FP32 (TFLOPS)
1.536 TFLOPS
16.03 TFLOPS
FP64 (TFLOPS)
—
1,001.8 GFLOPS (1:16)
FP16 (TFLOPS)
—
32.06 TFLOPS (2:1)
AI/RT
RT Cores
—
60
Power
TDP
254 W
200 W
TDP (W)
254
200
-21.3%
Suggested PSU
600 W
550 W
Power Connectors
2x 8-pin
Apple MPX
Architecture
Architecture
TeraScale 2
RDNA 2.0
GPU Name
Barts
Navi 21
Generation
Northern Islands
(HD 6800)
Radeon Pro Mac
(Navi II Series)
Process Size
40 nm
7 nm
Transistors
1,700 million
26,800 million
Die Size
255 mm²
520 mm²
Foundry
TSMC
TSMC
Density
6.7M / mm²
51.5M / mm²
API Support
DirectX
11.2 (11_0)
12 Ultimate (12_2)
OpenGL
4.4
4.6
Vulkan
—
1.4
OpenCL
1.2
2.1
Shader Model
5.0
6.8
Physical
Slot Width
Dual-slot
Quad-slot
Length
—
267 mm
10.5 inches
Height
—
120 mm
4.7 inches
Outputs
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
1x HDMI 2.14x Thunderbolt
Bus Interface
PCIe 2.0 x16
Apple MPX
Other
Launch Price
—
2,799 USD
Production
End-of-life
End-of-life
Predecessor
Evergreen
—
Successor
Southern Islands
—