AMD Radeon R9 280 vs AMD Radeon HD 8870 OEM
We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 280 and 2GB VRAM Radeon HD 8870 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon R9 280 's Advantages
Released 1 years and 2 months late
Boost Clock933MHz
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (240.0GB/s vs 153.6GB/s)
512 additional rendering cores
AMD Radeon HD 8870 OEM 's Advantages
Lower TDP (175W vs 200W)
Score
Benchmark
FP32 (float)
Radeon R9 280
+30%
3.344 TFLOPS
Radeon HD 8870 OEM
2.56 TFLOPS
Graphics Card
Mar 2014
Release Date
Jan 2013
Volcanic Islands
Generation
Sea Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
827 MHz
Base Clock
-
933 MHz
Boost Clock
-
1250 MHz
Memory Clock
1200 MHz
Memory
3GB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
384bit
Memory Bus
256bit
240.0GB/s
Bandwidth
153.6GB/s
Render Config
28
Compute Units
20
-
-
-
1792
Shading Units
1280
112
TMUs
80
32
ROPs
32
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
768 KB
L2 Cache
512 KB
-
-
-
Theoretical Performance
29.86 GPixel/s
Pixel Rate
32.00 GPixel/s
104.5 GTexel/s
Texture Rate
80.00 GTexel/s
-
-
-
3.344 TFLOPS
FP32 (float)
2.560 TFLOPS
836.0 GFLOPS
FP64 (double)
160.0 GFLOPS
Board Design
200W
TDP
175W
550 W
Suggested PSU
450 W
1x DVI
2x HDMI 1.4a
1x DisplayPort 1.2
Outputs
1x DVI
1x HDMI 1.4a
2x mini-DisplayPort 1.2
1x 6-pin + 1x 8-pin
Power Connectors
2x 6-pin
Graphics Processor
Tahiti
GPU Name
Pitcairn
Tahiti PRO3
(215-0821330)
GPU Variant
Pitcairn XT
(215-0828047)
GCN 1.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
4.313 billion
Transistors
2.8 billion
352 mm²
Die Size
212 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
