GeForce 8400 GS PCI vs Radeon HD 7870 XT
We compared two Desktop platform GPUs: 512MB VRAM GeForce 8400 GS PCI and 2GB VRAM Radeon HD 7870 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
GeForce 8400 GS PCI 's Advantages
Lower TDP (25W vs 185W)
Radeon HD 7870 XT 's Advantages
Released 4 years and 11 months late
Boost Clock975MHz
More VRAM (2GB vs 512GB)
Larger VRAM bandwidth (192.0GB/s vs 5.328GB/s)
1528 additional rendering cores
Score
Benchmark
FP32 (float)
GeForce 8400 GS PCI
22
Radeon HD 7870 XT
+13513%
2995
Graphics Card
Dec 2007
Release Date
Nov 2012
GeForce 8
Generation
Southern Islands
Desktop
Type
Desktop
PCI
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
925 MHz
-
Boost Clock
975 MHz
333 MHz
Memory Clock
1500 MHz
Memory
512MB
Memory Size
2GB
DDR2
Memory Type
GDDR5
64bit
Memory Bus
256bit
5.328GB/s
Bandwidth
192.0GB/s
Render Config
-
Compute Units
24
1
SM Count
-
8
Shading Units
1536
4
TMUs
96
4
ROPs
32
-
L1 Cache
16 KB (per CU)
16 KB
L2 Cache
512 KB
Theoretical Performance
2.268 GPixel/s
Pixel Rate
31.20 GPixel/s
2.268 GTexel/s
Texture Rate
93.60 GTexel/s
22.40 GFLOPS
FP32 (float)
2.995 TFLOPS
-
FP64 (double)
748.8 GFLOPS
Board Design
25W
TDP
185W
200 W
Suggested PSU
450 W
1x S-Video
1x DMS-59
Outputs
1x DVI
1x HDMI 1.4a
2x mini-DisplayPort 1.2
None
Power Connectors
2x 6-pin
Graphics Processor
G98
GPU Name
Tahiti
G98-400-U2
GPU Variant
Tahiti LE
(215-0821122)
Tesla
Architecture
GCN 1.0
TSMC
Foundry
TSMC
65 nm
Process Size
28 nm
0.21 billion
Transistors
4.313 billion
86 mm²
Die Size
352 mm²
Graphics Features
11.1 (10_0)
DirectX
12 (11_1)
3.3
OpenGL
4.6
1.1
OpenCL
1.2
N/A
Vulkan
1.2
1.1
CUDA
-
4.0
Shader Model
5.1