Radeon RX 6400 vs Radeon HD 8870 OEM
We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 6400 and 2GB VRAM Radeon HD 8870 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 6400 's Advantages
Released 9 years late
Boost Clock2321MHz
More VRAM (4GB vs 2GB)
Lower TDP (53W vs 175W)
Radeon HD 8870 OEM 's Advantages
Larger VRAM bandwidth (153.6GB/s vs 128.0GB/s)
512 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon RX 6400
+39%
3565
Radeon HD 8870 OEM
2560
Graphics Card
Jan 2022
Release Date
Jan 2013
Navi II
Generation
Sea Islands
Desktop
Type
Desktop
PCIe 4.0 x4
Bus Interface
PCIe 3.0 x16
Clock Speeds
1923 MHz
Base Clock
-
2321 MHz
Boost Clock
-
2000 MHz
Memory Clock
1200 MHz
Memory
4GB
Memory Size
2GB
GDDR6
Memory Type
GDDR5
64bit
Memory Bus
256bit
128.0GB/s
Bandwidth
153.6GB/s
Render Config
12
Compute Units
20
768
Shading Units
1280
48
TMUs
80
32
ROPs
32
12
RT Cores
-
128 KB per Array
L1 Cache
16 KB (per CU)
1024 KB
L2 Cache
512 KB
16 MB
L3 Cache
-
Theoretical Performance
74.27 GPixel/s
Pixel Rate
32.00 GPixel/s
111.4 GTexel/s
Texture Rate
80.00 GTexel/s
7.130 TFLOPS
FP16 (half)
-
3.565 TFLOPS
FP32 (float)
2.560 TFLOPS
222.8 GFLOPS
FP64 (double)
160.0 GFLOPS
Board Design
53W
TDP
175W
250 W
Suggested PSU
450 W
1x HDMI 2.1
1x DisplayPort 1.4a
Outputs
1x DVI
1x HDMI 1.4a
2x mini-DisplayPort 1.2
None
Power Connectors
2x 6-pin
Graphics Processor
Navi 24
GPU Name
Pitcairn
Navi 24 XL
(215-135000046)
GPU Variant
Pitcairn XT
(215-0828047)
RDNA 2.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
6 nm
Process Size
28 nm
5.4 billion
Transistors
2.8 billion
107 mm²
Die Size
212 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
12 (11_1)
4.6
OpenGL
4.6
2.2
OpenCL
1.2
1.3
Vulkan
1.2
6.7
Shader Model
5.1
