AMD Radeon R9 295X2 vs AMD Radeon HD 8870 OEM
GPU Specs Compare
Graphics Card
Release Date
Apr 2014
Jan 2013
Generation
Volcanic Islands
Sea Islands
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1250 MHz
1200 MHz
Memory
Memory Size
4GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
512bit
256bit
Bandwidth
320.0GB/s
153.6GB/s
Render Config
Compute Units
44
20
Shading Units
2816
1280
TMUs
176
80
ROPs
64
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
1024 KB
512 KB
Theoretical Performance
Pixel Rate
65.15 GPixel/s
32.00 GPixel/s
Texture Rate
179.2 GTexel/s
80.00 GTexel/s
FP32 (float)
5.733 TFLOPS
2.560 TFLOPS
FP64 (double)
716.7 GFLOPS
160.0 GFLOPS
Graphics Processor
GPU Name
Vesuvius
Pitcairn
GPU Variant
Vesuvius XT(215-0852022)
Pitcairn XT(215-0828047)
Architecture
GCN 2.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
6.2 billion
2.8 billion
Die Size
438 mm²
212 mm²
Board Design
TDP
500W
175W
Suggested PSU
900 W
450 W
Outputs
1x DVI4x mini-DisplayPort 1.2
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
2x 8-pin
2x 6-pin
Graphics Features
DirectX
12 (12_0)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
2.0
1.2
Vulkan
1.2
1.2
Shader Model
6.3
5.1