Home GPU Comparison AMD Radeon HD 8870 OEM vs AMD Radeon HD 7970 X2

AMD Radeon HD 8870 OEM vs AMD Radeon HD 7970 X2

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 8870 OEM and 3GB VRAM Radeon HD 7970 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8870 OEM 's Advantages
Lower TDP (175W vs 500W)
AMD Radeon HD 7970 X2 's Advantages
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (264.0GB/s vs 153.6GB/s)
768 additional rendering cores

Score

Benchmark

FP32 (float)
Radeon HD 8870 OEM
2.56 TFLOPS
Radeon HD 7970 X2 +48%
3.789 TFLOPS
VS

Graphics Card

Jan 2013
Release Date
Aug 2012
Sea Islands
Generation
Southern Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

-
-
-
-
-
-
1200 MHz
Memory Clock
1375 MHz

Memory

2GB
Memory Size
3GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
384bit
153.6GB/s
Bandwidth
264.0GB/s

Render Config

20
Compute Units
32
-
-
-
1280
Shading Units
2048
80
TMUs
128
32
ROPs
32
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
768 KB
-
-
-

Theoretical Performance

32.00 GPixel/s
Pixel Rate
29.60 GPixel/s
80.00 GTexel/s
Texture Rate
118.4 GTexel/s
-
-
-
2.560 TFLOPS
FP32 (float)
3.789 TFLOPS
160.0 GFLOPS
FP64 (double)
947.2 GFLOPS

Board Design

175W
TDP
500W
450 W
Suggested PSU
900 W
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
Outputs
2x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
2x 6-pin
Power Connectors
3x 8-pin

Graphics Processor

Pitcairn
GPU Name
New Zealand
Pitcairn XT (215-0828047)
GPU Variant
-
GCN 1.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
2.8 billion
Transistors
4.313 billion
212 mm²
Die Size
352 mm²

Graphics Features

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

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