AMD Radeon RX 6900 XTX vs AMD Radeon R9 285
GPU · Specs Compare
Graphics Card
Release Date
Unknown
Sep 2014
Generation
Navi II
Volcanic Islands
Type
Desktop
Desktop
Bus Interface
PCIe 4.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
2075 MHz
—
Boost Clock
2435 MHz
—
Memory Clock
2250 MHz
1375 MHz
Memory
Memory Size
16GB
2GB
Memory Type
GDDR6
GDDR5
Memory Bus
256bit
256bit
Bandwidth
576.0GB/s
176.0GB/s
Render Config
Compute Units
80
28
Shading Units
5120
1792
TMUs
320
112
ROPs
128
32
RT Cores
80
—
L1 Cache
128 KB per Array
16 KB (per CU)
L2 Cache
4 MB
512 KB
L3 Cache
128 MB
—
Theoretical Performance
Pixel Rate
311.7 GPixel/s
29.38 GPixel/s
Texture Rate
779.2 GTexel/s
102.8 GTexel/s
FP16 (half)
49.87 TFLOPS
3.290 TFLOPS
FP32 (float)
24.93 TFLOPS
3.290 TFLOPS
FP64 (double)
1.558 TFLOPS
205.6 GFLOPS
Graphics Processor
GPU Name
Navi 21
Tonga
GPU Variant
Navi 21 XTXH(215-121000247)
Tonga PRO(215-0851128)
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
330W
190W
Suggested PSU
700 W
450 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
2x 6-pin
Graphics Features
DirectX
12 Ultimate (12_2)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
2.1
2.1
Vulkan
1.3
1.2.170
Shader Model
6.5
6.5
▲ Specs Compare
Data sourced from official specifications and benchmark tests.