Home GPU Comparison AMD Radeon R9 390 vs AMD Radeon R9 270X

AMD Radeon R9 390 vs AMD Radeon R9 270X

We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390 and 2GB VRAM Radeon R9 270X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 390 's Advantages
Released 1 years and 8 months late
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (384.0GB/s vs 179.2GB/s)
1280 additional rendering cores
AMD Radeon R9 270X 's Advantages
Boost Clock1050MHz
Lower TDP (180W vs 275W)

Score

Benchmark

FP32 (float)
Radeon R9 390 +90%
5.12 TFLOPS
Radeon R9 270X
2.688 TFLOPS
3DMark Time Spy
Radeon R9 390 +123%
3950
Radeon R9 270X
1769
VS

Graphics Card

Jun 2015
Release Date
Oct 2013
Pirate Islands
Generation
Volcanic Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

-
Base Clock
1000 MHz
-
Boost Clock
1050 MHz
1500 MHz
Memory Clock
1400 MHz

Memory

8GB
Memory Size
2GB
GDDR5
Memory Type
GDDR5
512bit
Memory Bus
256bit
384.0GB/s
Bandwidth
179.2GB/s

Render Config

40
Compute Units
20
-
-
-
2560
Shading Units
1280
160
TMUs
80
64
ROPs
32
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
1024 KB
L2 Cache
512 KB
-
-
-

Theoretical Performance

64.00 GPixel/s
Pixel Rate
33.60 GPixel/s
160.0 GTexel/s
Texture Rate
84.00 GTexel/s
-
-
-
5.120 TFLOPS
FP32 (float)
2.688 TFLOPS
640.0 GFLOPS
FP64 (double)
168.0 GFLOPS

Board Design

275W
TDP
180W
600 W
Suggested PSU
450 W
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
1x 6-pin + 1x 8-pin
Power Connectors
2x 6-pin

Graphics Processor

Grenada
GPU Name
Curacao
Grenada PRO (215-0880030)
GPU Variant
Curacao XT (215-0848004)
GCN 2.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
6.2 billion
Transistors
2.8 billion
438 mm²
Die Size
212 mm²

Graphics Features

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

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