AMD Radeon RX 6800 3456SP vs AMD Radeon R9 285X
GPU · Specs Compare
Graphics Card
Release Date
Unknown
Unknown
Generation
Navi II
Volcanic Islands
Type
Desktop
Desktop
Bus Interface
PCIe 4.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
1700 MHz
—
Boost Clock
2250 MHz
—
Memory Clock
2000 MHz
1375 MHz
Memory
Memory Size
16GB
3GB
Memory Type
GDDR6
GDDR5
Memory Bus
256bit
384bit
Bandwidth
512.0GB/s
264.0GB/s
Render Config
Compute Units
54
32
Shading Units
3456
2048
TMUs
216
128
ROPs
96
32
RT Cores
54
—
L1 Cache
128 KB per Array
16 KB (per CU)
L2 Cache
4 MB
768 KB
L3 Cache
128 MB
—
Theoretical Performance
Pixel Rate
216.0 GPixel/s
32.06 GPixel/s
Texture Rate
486.0 GTexel/s
128.3 GTexel/s
FP16 (half)
31.10 TFLOPS
—
FP32 (float)
15.55 TFLOPS
4.104 TFLOPS
FP64 (double)
972.0 GFLOPS
—
Graphics Processor
GPU Name
Navi 21
Tonga
GPU Variant
Navi 21 ES(215-121000066)
Tonga XT(215-0851313)
Architecture
RDNA 2.0
GCN 3.0
Foundry
TSMC
TSMC
Process Size
7 nm
28 nm
Transistors
26.8 billion
5 billion
Die Size
520 mm²
366 mm²
Board Design
TDP
250W
200W
Suggested PSU
600 W
550 W
Outputs
1x HDMI 2.12x DisplayPort 1.4a1x USB Type-C
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
2x 8-pin
1x 6-pin + 1x 8-pin
Graphics Features
DirectX
12 Ultimate (12_2)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
2.1
2.0
Vulkan
1.3
1.2
Shader Model
6.8
6.3
▲ Specs Compare
Data sourced from official specifications and benchmark tests.