Radeon RX 6400 vs Radeon HD 4855
We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 6400 and 512MB VRAM Radeon HD 4855 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 6400 's Advantages
Released 12 years late
Boost Clock2321MHz
More VRAM (4GB vs 512GB)
Larger VRAM bandwidth (128.0GB/s vs 115.2GB/s)
128 additional rendering cores
Lower TDP (53W vs 110W)
Score
Benchmark
FP32 (float)
Radeon RX 6400
+384%
3565
Radeon HD 4855
736
Graphics Card
Jan 2022
Release Date
Jan 2010
Navi II
Generation
Radeon R700
Desktop
Type
Desktop
PCIe 4.0 x4
Bus Interface
PCIe 2.0 x16
Clock Speeds
1923 MHz
Base Clock
-
2321 MHz
Boost Clock
-
2000 MHz
Memory Clock
900 MHz
Memory
4GB
Memory Size
512MB
GDDR6
Memory Type
GDDR5
64bit
Memory Bus
256bit
128.0GB/s
Bandwidth
115.2GB/s
Render Config
12
Compute Units
8
768
Shading Units
640
48
TMUs
32
32
ROPs
16
12
RT Cores
-
128 KB per Array
L1 Cache
16 KB (per CU)
1024 KB
L2 Cache
256 KB
16 MB
L3 Cache
-
Theoretical Performance
74.27 GPixel/s
Pixel Rate
9.200 GPixel/s
111.4 GTexel/s
Texture Rate
18.40 GTexel/s
7.130 TFLOPS
FP16 (half)
-
3.565 TFLOPS
FP32 (float)
736.0 GFLOPS
222.8 GFLOPS
FP64 (double)
147.2 GFLOPS
Board Design
53W
TDP
110W
250 W
Suggested PSU
300 W
1x HDMI 2.1
1x DisplayPort 1.4a
Outputs
1x DVI
1x HDMI 1.3a
1x VGA
None
Power Connectors
1x 6-pin
Graphics Processor
Navi 24
GPU Name
RV770
Navi 24 XL
(215-135000046)
GPU Variant
RV770 PRO
(215-0669065)
RDNA 2.0
Architecture
TeraScale
TSMC
Foundry
TSMC
6 nm
Process Size
55 nm
5.4 billion
Transistors
0.956 billion
107 mm²
Die Size
256 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
10.1 (10_1)
4.6
OpenGL
3.3
2.2
OpenCL
1.1
1.3
Vulkan
N/A
6.7
Shader Model
4.1
