AMD Radeon R9 390 vs AMD Radeon HD 7850
GPU · Specs Compare
Graphics Card
Release Date
Jun 2015
Mar 2012
Generation
Pirate Islands
Southern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1500 MHz
1200 MHz
Memory
Memory Size
8GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
512bit
256bit
Bandwidth
384.0GB/s
153.6GB/s
Render Config
Compute Units
40
16
Shading Units
2560
1024
TMUs
160
64
ROPs
64
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
1024 KB
512 KB
Theoretical Performance
Pixel Rate
64.00 GPixel/s
27.52 GPixel/s
Texture Rate
160.0 GTexel/s
55.04 GTexel/s
FP32 (float)
5.120 TFLOPS
1.761 TFLOPS
FP64 (double)
640.0 GFLOPS
110.1 GFLOPS
Graphics Processor
GPU Name
Grenada
Pitcairn
GPU Variant
Grenada PRO(215-0880030)
Pitcairn PRO(215-0828062)
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
275W
130W
Suggested PSU
600 W
300 W
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
1x 6-pin + 1x 8-pin
1x 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
Benchmark
3DMark Time Spy
3,964
1,334
3DMark Time Spy Extreme
1,931
325
▲ Specs Compare
Data sourced from official specifications and benchmark tests.