Home GPU Comparison AMD Radeon HD 7870 GHz Edition vs AMD Radeon RX 455 OEM

AMD Radeon HD 7870 GHz Edition vs AMD Radeon RX 455 OEM

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 GHz Edition and 2GB VRAM Radeon RX 455 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7870 GHz Edition 's Advantages
Larger VRAM bandwidth (153.6GB/s vs 104.0GB/s)
512 additional rendering cores
AMD Radeon RX 455 OEM 's Advantages
Released 4 years and 3 months late
Lower TDP (100W vs 175W)

Score

Benchmark

FP32 (float)
Radeon HD 7870 GHz Edition +58%
2.56 TFLOPS
Radeon RX 455 OEM
1.613 TFLOPS
VS

Graphics Card

Mar 2012
Release Date
Jun 2016
Southern Islands
Generation
Arctic Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

-
-
-
-
-
-
1200 MHz
Memory Clock
1625 MHz

Memory

2GB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
128bit
153.6GB/s
Bandwidth
104.0GB/s

Render Config

20
Compute Units
12
-
-
-
1280
Shading Units
768
80
TMUs
48
32
ROPs
16
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
256 KB
-
-
-

Theoretical Performance

32.00 GPixel/s
Pixel Rate
16.80 GPixel/s
80.00 GTexel/s
Texture Rate
50.40 GTexel/s
-
-
-
2.560 TFLOPS
FP32 (float)
1.613 TFLOPS
160.0 GFLOPS
FP64 (double)
100.8 GFLOPS

Board Design

175W
TDP
100W
450 W
Suggested PSU
300 W
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
Outputs
1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
2x 6-pin
Power Connectors
1x 6-pin

Graphics Processor

Pitcairn
GPU Name
Tobago
Pitcairn XT (215-0828047)
GPU Variant
Tobago PRO (215-0875010)
GCN 1.0
Architecture
GCN 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
2.8 billion
Transistors
2.08 billion
212 mm²
Die Size
160 mm²

Graphics Features

12 (11_1)
DirectX
12 (12_0)
4.6
OpenGL
4.6
1.2
OpenCL
2.0
1.2
Vulkan
1.2
-
-
-
5.1
Shader Model
6.3

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