AMD Radeon RX 6600 vs AMD Radeon R9 285X
GPU · Specs Compare
Graphics Card
Release Date
Oct 2021
Unknown
Generation
Navi II
Volcanic Islands
Type
Desktop
Desktop
Bus Interface
PCIe 4.0 x8
PCIe 3.0 x16
Clock Speeds
Base Clock
1626 MHz
—
Boost Clock
2491 MHz
—
Memory Clock
1750 MHz
1375 MHz
Memory
Memory Size
8GB
3GB
Memory Type
GDDR6
GDDR5
Memory Bus
128bit
384bit
Bandwidth
224.0GB/s
264.0GB/s
Render Config
Compute Units
28
32
Shading Units
1792
2048
TMUs
112
128
ROPs
64
32
RT Cores
28
—
L1 Cache
128 KB per Array
16 KB (per CU)
L2 Cache
2 MB
768 KB
L3 Cache
32 MB
—
Theoretical Performance
Pixel Rate
159.4 GPixel/s
32.06 GPixel/s
Texture Rate
279.0 GTexel/s
128.3 GTexel/s
FP16 (half)
17.86 TFLOPS
—
FP32 (float)
8.928 TFLOPS
4.104 TFLOPS
FP64 (double)
558.0 GFLOPS
—
Graphics Processor
GPU Name
Navi 23
Tonga
GPU Variant
Navi 23 XL(215-130000016)
Tonga XT(215-0851313)
Architecture
RDNA 2.0
GCN 3.0
Foundry
TSMC
TSMC
Process Size
7 nm
28 nm
Transistors
11.06 billion
5 billion
Die Size
237 mm²
366 mm²
Board Design
TDP
132W
200W
Suggested PSU
300 W
550 W
Outputs
1x HDMI 2.13x DisplayPort 1.4a
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
1x 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
6.5
6.3
▲ Specs Compare
Data sourced from official specifications and benchmark tests.