Home GPU Comparison ATI Radeon HD 3870 Mac Edition vs AMD Radeon R9 390 X2

ATI Radeon HD 3870 Mac Edition vs AMD Radeon R9 390 X2

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 3870 Mac Edition and 8GB VRAM Radeon R9 390 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 3870 Mac Edition 's Advantages
Lower TDP (106W vs 580W)
AMD Radeon R9 390 X2 's Advantages
Released 7 years and 3 months late
More VRAM (8GB vs 512GB)
Larger VRAM bandwidth (345.6GB/s vs 72.06GB/s)
2240 additional rendering cores

Score

Benchmark

FP32 (float)
Radeon HD 3870 Mac Edition
0.497 TFLOPS
Radeon R9 390 X2 +930%
5.12 TFLOPS
VS

Graphics Card

Jun 2008
Release Date
Sep 2015
Radeon R600
Generation
Pirate Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

-
-
-
-
-
-
1126 MHz
Memory Clock
1350 MHz

Memory

512MB
Memory Size
8GB
GDDR4
Memory Type
GDDR5
256bit
Memory Bus
512bit
72.06GB/s
Bandwidth
345.6GB/s

Render Config

4
Compute Units
40
-
-
-
320
Shading Units
2560
16
TMUs
160
16
ROPs
64
-
-
-
-
-
-
-
L1 Cache
16 KB (per CU)
256 KB
L2 Cache
1024 KB
-
-
-

Theoretical Performance

12.43 GPixel/s
Pixel Rate
64.00 GPixel/s
12.43 GTexel/s
Texture Rate
160.0 GTexel/s
-
-
-
497.3 GFLOPS
FP32 (float)
5.120 TFLOPS
99.46 GFLOPS
FP64 (double)
640.0 GFLOPS

Board Design

106W
TDP
580W
300 W
Suggested PSU
950 W
2x DVI 1x S-Video
Outputs
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
1x 6-pin
Power Connectors
4x 8-pin

Graphics Processor

RV670
GPU Name
Grenada
RV670 XT (215-0708005)
GPU Variant
Grenada PRO (215-0880030)
TeraScale
Architecture
GCN 2.0
TSMC
Foundry
TSMC
55 nm
Process Size
28 nm
0.666 billion
Transistors
6.2 billion
192 mm²
Die Size
438 mm²

Graphics Features

10.1 (10_1)
DirectX
12 (12_0)
3.3 (full) 4.0 (partial)
OpenGL
4.6
N/A
OpenCL
2.0
N/A
Vulkan
1.2
-
-
-
4.1
Shader Model
6.3

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