Radeon RX 6400 vs Radeon HD 6770 Green Edition
We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 6400 and 2GB VRAM Radeon HD 6770 Green Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 6400 's Advantages
Released 8 years and 9 months late
Boost Clock2321MHz
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (128.0GB/s vs 21.34GB/s)
48 additional rendering cores
Lower TDP (53W vs 86W)
Score
Benchmark
FP32 (float)
Radeon RX 6400
+253%
3565
Radeon HD 6770 Green Edition
1008
Graphics Card
Jan 2022
Release Date
Apr 2013
Navi II
Generation
Northern Islands
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
667 MHz
Memory
4GB
Memory Size
2GB
GDDR6
Memory Type
GDDR3
64bit
Memory Bus
128bit
128.0GB/s
Bandwidth
21.34GB/s
Render Config
12
Compute Units
9
768
Shading Units
720
48
TMUs
36
32
ROPs
16
12
RT Cores
-
128 KB per Array
L1 Cache
8 KB (per CU)
1024 KB
L2 Cache
256 KB
16 MB
L3 Cache
-
Theoretical Performance
74.27 GPixel/s
Pixel Rate
11.20 GPixel/s
111.4 GTexel/s
Texture Rate
25.20 GTexel/s
7.130 TFLOPS
FP16 (half)
-
3.565 TFLOPS
FP32 (float)
1008 GFLOPS
222.8 GFLOPS
FP64 (double)
-
Board Design
53W
TDP
86W
250 W
Suggested PSU
250 W
1x HDMI 2.1
1x DisplayPort 1.4a
Outputs
2x DVI
1x HDMI 1.3a
2x mini-DisplayPort 1.1
None
Power Connectors
-
Graphics Processor
Navi 24
GPU Name
Juniper
Navi 24 XL
(215-135000046)
GPU Variant
Juniper LE
(215-0754009)
RDNA 2.0
Architecture
TeraScale 2
TSMC
Foundry
TSMC
6 nm
Process Size
40 nm
5.4 billion
Transistors
1.04 billion
107 mm²
Die Size
166 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
2.2
OpenCL
1.2
1.3
Vulkan
N/A
6.7
Shader Model
5.0
