Home GPU Comparison AMD Radeon HD 6870 vs AMD Radeon R9 390 X2

AMD Radeon HD 6870 vs AMD Radeon R9 390 X2

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 and 8GB VRAM Radeon R9 390 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870 's Advantages
Lower TDP (151W vs 580W)
AMD Radeon R9 390 X2 's Advantages
Released 4 years and 11 months late
More VRAM (8GB vs 1024GB)
Larger VRAM bandwidth (345.6GB/s vs 134.4GB/s)
1440 additional rendering cores

Score

Benchmark

FP32 (float)
Radeon HD 6870
2.016 TFLOPS
Radeon R9 390 X2 +153%
5.12 TFLOPS
VS

Graphics Card

Oct 2010
Release Date
Sep 2015
Northern Islands
Generation
Pirate Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

-
-
-
-
-
-
1050 MHz
Memory Clock
1350 MHz

Memory

1024MB
Memory Size
8GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
512bit
134.4GB/s
Bandwidth
345.6GB/s

Render Config

14
Compute Units
40
-
-
-
1120
Shading Units
2560
56
TMUs
160
32
ROPs
64
-
-
-
-
-
-
8 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
1024 KB
-
-
-

Theoretical Performance

28.80 GPixel/s
Pixel Rate
64.00 GPixel/s
50.40 GTexel/s
Texture Rate
160.0 GTexel/s
-
-
-
2.016 TFLOPS
FP32 (float)
5.120 TFLOPS
-
FP64 (double)
640.0 GFLOPS

Board Design

151W
TDP
580W
450 W
Suggested PSU
950 W
2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1
Outputs
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
2x 6-pin
Power Connectors
4x 8-pin

Graphics Processor

Barts
GPU Name
Grenada
Barts XT (215-0798000)
GPU Variant
Grenada PRO (215-0880030)
TeraScale 2
Architecture
GCN 2.0
TSMC
Foundry
TSMC
40 nm
Process Size
28 nm
1.7 billion
Transistors
6.2 billion
255 mm²
Die Size
438 mm²

Graphics Features

11.2 (11_0)
DirectX
12 (12_0)
4.4
OpenGL
4.6
1.2
OpenCL
2.0
N/A
Vulkan
1.2
-
-
-
5.0
Shader Model
6.3

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