Home GPU Comparison AMD Radeon HD 8870M vs NVIDIA GeForce RTX 4090 Mobile

AMD Radeon HD 8870M vs NVIDIA GeForce RTX 4090 Mobile

We compared two Mobile platform GPUs: 2GB VRAM Radeon HD 8870M and 16GB VRAM GeForce RTX 4090 Mobile to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce RTX 4090 Mobile 's Advantages
Released 9 years and 9 months late
Boost Clock has increased by 119% (1695MHz vs 775MHz)
More VRAM (16GB vs 2GB)
Larger VRAM bandwidth (576.0GB/s vs 72.00GB/s)
9088 additional rendering cores

Score

Benchmark

FP32 (float)
Radeon HD 8870M
0.992 TFLOPS
GeForce RTX 4090 Mobile +3224%
32.98 TFLOPS
VS

Graphics Card

Apr 2013
Release Date
Jan 2023
Solar System
Generation
GeForce 40 Mobile
Mobile
Type
Mobile
PCIe 3.0 x16
Bus Interface
PCIe 4.0 x16

Clock Speeds

725 MHz
Base Clock
1335 MHz
775 MHz
Boost Clock
1695 MHz
1125 MHz
Memory Clock
2250 MHz

Memory

2GB
Memory Size
16GB
GDDR5
Memory Type
GDDR6
128bit
Memory Bus
256bit
72.00GB/s
Bandwidth
576.0GB/s

Render Config

10
Compute Units
-
-
SM Count
76
640
Shading Units
9728
40
TMUs
304
16
ROPs
112
-
Tensor Cores
304
-
RT Cores
76
16 KB (per CU)
L1 Cache
128 KB (per SM)
256 KB
L2 Cache
64 MB
-
-
-

Theoretical Performance

12.40 GPixel/s
Pixel Rate
189.8 GPixel/s
31.00 GTexel/s
Texture Rate
515.3 GTexel/s
-
FP16 (half)
32.98 TFLOPS
992.0 GFLOPS
FP32 (float)
32.98 TFLOPS
62.00 GFLOPS
FP64 (double)
515.3 GFLOPS

Board Design

Unknown
TDP
80-150W
-
-
-
Portable Device Dependent
Outputs
Portable Device Dependent
-
Power Connectors
None

Graphics Processor

Venus
GPU Name
AD103
Venus XT (216-0846000)
GPU Variant
GN21-X11
GCN 1.0
Architecture
Ada Lovelace
TSMC
Foundry
TSMC
28 nm
Process Size
5 nm
1.5 billion
Transistors
45.9 billion
123 mm²
Die Size
379 mm²

Graphics Features

12 (11_1)
DirectX
12 Ultimate (12_2)
4.6
OpenGL
4.6
2.1 (1.2)
OpenCL
3.0
1.2.170
Vulkan
1.3
-
CUDA
8.9
6.5 (5.1)
Shader Model
6.8

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