AMD Radeon R9 285 vs AMD Radeon RX 6800 3456SP
GPU Specs Compare
Graphics Card
Release Date
Sep 2014
Unknown
Generation
Volcanic Islands
Navi II
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 4.0 x16
Clock Speeds
Memory Clock
1375 MHz
2000 MHz
Base Clock
-
1700 MHz
Boost Clock
-
2250 MHz
Memory
Memory Size
2GB
16GB
Memory Type
GDDR5
GDDR6
Memory Bus
256bit
256bit
Bandwidth
176.0GB/s
512.0GB/s
Render Config
Compute Units
28
54
Shading Units
1792
3456
TMUs
112
216
ROPs
32
96
L1 Cache
16 KB (per CU)
128 KB per Array
L2 Cache
512 KB
4 MB
RT Cores
-
54
L3 Cache
-
128 MB
Theoretical Performance
Pixel Rate
29.38 GPixel/s
216.0 GPixel/s
Texture Rate
102.8 GTexel/s
486.0 GTexel/s
FP16 (half)
3.290 TFLOPS
31.10 TFLOPS
FP32 (float)
3.290 TFLOPS
15.55 TFLOPS
FP64 (double)
205.6 GFLOPS
972.0 GFLOPS
Graphics Processor
GPU Name
Tonga
Navi 21
GPU Variant
Tonga PRO(215-0851128)
Navi 21 ES(215-121000066)
Architecture
GCN 3.0
RDNA 2.0
Foundry
TSMC
TSMC
Process Size
28 nm
7 nm
Transistors
5 billion
26.8 billion
Die Size
366 mm²
520 mm²
Board Design
TDP
190W
250W
Suggested PSU
450 W
600 W
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
1x HDMI 2.12x DisplayPort 1.4a1x USB Type-C
Power Connectors
2x 6-pin
2x 8-pin
Graphics Features
DirectX
12 (12_0)
12 Ultimate (12_2)
OpenGL
4.6
4.6
OpenCL
2.1
2.1
Vulkan
1.2.170
1.3
Shader Model
6.5
6.8