Radeon RX 6400 vs Radeon HD 6790
We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 6400 and 1024MB VRAM Radeon HD 6790 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 6400 's Advantages
Released 10 years and 9 months late
Boost Clock2321MHz
More VRAM (4GB vs 1024GB)
Lower TDP (53W vs 150W)
Radeon HD 6790 's Advantages
Larger VRAM bandwidth (134.4GB/s vs 128.0GB/s)
32 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon RX 6400
+165%
3565
Radeon HD 6790
1344
Graphics Card
Jan 2022
Release Date
Apr 2011
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
1050 MHz
Memory
4GB
Memory Size
1024MB
GDDR6
Memory Type
GDDR5
64bit
Memory Bus
256bit
128.0GB/s
Bandwidth
134.4GB/s
Render Config
12
Compute Units
10
768
Shading Units
800
48
TMUs
40
32
ROPs
16
12
RT Cores
-
128 KB per Array
L1 Cache
8 KB (per CU)
1024 KB
L2 Cache
512 KB
16 MB
L3 Cache
-
Theoretical Performance
74.27 GPixel/s
Pixel Rate
13.44 GPixel/s
111.4 GTexel/s
Texture Rate
33.60 GTexel/s
7.130 TFLOPS
FP16 (half)
-
3.565 TFLOPS
FP32 (float)
1344 GFLOPS
222.8 GFLOPS
FP64 (double)
-
Board Design
53W
TDP
150W
250 W
Suggested PSU
450 W
1x HDMI 2.1
1x DisplayPort 1.4a
Outputs
2x DVI
1x HDMI 1.3a
1x DisplayPort 1.1
None
Power Connectors
2x 6-pin
Graphics Processor
Navi 24
GPU Name
Barts
Navi 24 XL
(215-135000046)
GPU Variant
Barts LE
(215-0798002)
RDNA 2.0
Architecture
TeraScale 2
TSMC
Foundry
TSMC
6 nm
Process Size
40 nm
5.4 billion
Transistors
1.7 billion
107 mm²
Die Size
255 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
