Home GPU Comparison AMD Radeon HD 7950 vs AMD Radeon RX 6400

AMD Radeon HD 7950 vs AMD Radeon RX 6400

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7950 and 4GB VRAM Radeon RX 6400 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7950 's Advantages
Larger VRAM bandwidth (240.0GB/s vs 128.0GB/s)
1024 additional rendering cores
AMD Radeon RX 6400 's Advantages
Released 10 years late
Boost Clock2321MHz
More VRAM (4GB vs 3GB)
Lower TDP (53W vs 200W)

Score

Benchmark

FP32 (float)
Radeon HD 7950
2.867 TFLOPS
Radeon RX 6400 +24%
3.565 TFLOPS
3DMark Time Spy
Radeon HD 7950
1917
Radeon RX 6400 +86%
3579
VS

Graphics Card

Jan 2012
Release Date
Jan 2022
Southern Islands
Generation
Navi II
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 4.0 x4

Clock Speeds

-
Base Clock
1923 MHz
-
Boost Clock
2321 MHz
1250 MHz
Memory Clock
2000 MHz

Memory

3GB
Memory Size
4GB
GDDR5
Memory Type
GDDR6
384bit
Memory Bus
64bit
240.0GB/s
Bandwidth
128.0GB/s

Render Config

28
Compute Units
12
-
-
-
1792
Shading Units
768
112
TMUs
48
32
ROPs
32
-
-
-
-
RT Cores
12
16 KB (per CU)
L1 Cache
128 KB per Array
768 KB
L2 Cache
1024 KB
-
L3 Cache
16 MB

Theoretical Performance

25.60 GPixel/s
Pixel Rate
74.27 GPixel/s
89.60 GTexel/s
Texture Rate
111.4 GTexel/s
-
FP16 (half)
7.130 TFLOPS
2.867 TFLOPS
FP32 (float)
3.565 TFLOPS
716.8 GFLOPS
FP64 (double)
222.8 GFLOPS

Board Design

200W
TDP
53W
550 W
Suggested PSU
250 W
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
Outputs
1x HDMI 2.1 1x DisplayPort 1.4a
2x 6-pin
Power Connectors
None

Graphics Processor

Tahiti
GPU Name
Navi 24
Tahiti PRO (215-0821056)
GPU Variant
Navi 24 XL (215-135000046)
GCN 1.0
Architecture
RDNA 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
6 nm
4.313 billion
Transistors
5.4 billion
352 mm²
Die Size
107 mm²

Graphics Features

12 (11_1)
DirectX
12 Ultimate (12_2)
4.6
OpenGL
4.6
1.2
OpenCL
2.2
1.2
Vulkan
1.3
-
-
-
5.1
Shader Model
6.7

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