AMD Radeon RX 6400 vs AMD Radeon HD 6850 X2
GPU Specs Compare
Graphics Card
Release Date
Jan 2022
Sep 2011
Generation
Navi II
Northern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 4.0 x4
PCIe 2.0 x16
Clock Speeds
Base Clock
1923 MHz
-
Boost Clock
2321 MHz
-
Memory Clock
2000 MHz
1050 MHz
Memory
Memory Size
4GB
2GB
Memory Type
GDDR6
GDDR5
Memory Bus
64bit
256bit
Bandwidth
128.0GB/s
134.4GB/s
Render Config
Compute Units
12
12
Shading Units
768
960
TMUs
48
48
ROPs
32
32
RT Cores
12
-
L1 Cache
128 KB per Array
8 KB (per CU)
L2 Cache
1024 KB
512 KB
L3 Cache
16 MB
-
Theoretical Performance
Pixel Rate
74.27 GPixel/s
25.60 GPixel/s
Texture Rate
111.4 GTexel/s
38.40 GTexel/s
FP16 (half)
7.130 TFLOPS
-
FP32 (float)
3.565 TFLOPS
1.536 TFLOPS
FP64 (double)
222.8 GFLOPS
-
Graphics Processor
GPU Name
Navi 24
Barts
GPU Variant
Navi 24 XL(215-135000046)
Barts PRO(215-0798006)
Architecture
RDNA 2.0
TeraScale 2
Foundry
TSMC
TSMC
Process Size
6 nm
40 nm
Transistors
5.4 billion
1.7 billion
Die Size
107 mm²
255 mm²
Board Design
TDP
53W
254W
Suggested PSU
250 W
600 W
Outputs
1x HDMI 2.11x DisplayPort 1.4a
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
Power Connectors
None
2x 8-pin
Graphics Features
DirectX
12 Ultimate (12_2)
11.2 (11_0)
OpenGL
4.6
4.4
OpenCL
2.2
1.2
Vulkan
1.3
N/A
Shader Model
6.7
5.0