Home GPU Comparison ATI Radeon HD 3870 Mac Edition vs AMD Radeon HD 7970 GHz Edition

ATI Radeon HD 3870 Mac Edition vs AMD Radeon HD 7970 GHz Edition

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 3870 Mac Edition and 3GB VRAM Radeon HD 7970 GHz Edition 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 300W)
AMD Radeon HD 7970 GHz Edition 's Advantages
Released 4 years late
Boost Clock1050MHz
More VRAM (3GB vs 512GB)
Larger VRAM bandwidth (288.0GB/s vs 72.06GB/s)
1728 additional rendering cores

Score

Benchmark

FP32 (float)
Radeon HD 3870 Mac Edition
0.497 TFLOPS
Radeon HD 7970 GHz Edition +765%
4.301 TFLOPS
VS

Graphics Card

Jun 2008
Release Date
Jun 2012
Radeon R600
Generation
Southern Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

-
Base Clock
1000 MHz
-
Boost Clock
1050 MHz
1126 MHz
Memory Clock
1500 MHz

Memory

512MB
Memory Size
3GB
GDDR4
Memory Type
GDDR5
256bit
Memory Bus
384bit
72.06GB/s
Bandwidth
288.0GB/s

Render Config

4
Compute Units
32
-
-
-
320
Shading Units
2048
16
TMUs
128
16
ROPs
32
-
-
-
-
-
-
-
L1 Cache
16 KB (per CU)
256 KB
L2 Cache
768 KB
-
-
-

Theoretical Performance

12.43 GPixel/s
Pixel Rate
33.60 GPixel/s
12.43 GTexel/s
Texture Rate
134.4 GTexel/s
-
-
-
497.3 GFLOPS
FP32 (float)
4.301 TFLOPS
99.46 GFLOPS
FP64 (double)
1075 GFLOPS

Board Design

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

Graphics Processor

RV670
GPU Name
Tahiti
RV670 XT (215-0708005)
GPU Variant
Tahiti XT2 (215-0821065)
TeraScale
Architecture
GCN 1.0
TSMC
Foundry
TSMC
55 nm
Process Size
28 nm
0.666 billion
Transistors
4.313 billion
192 mm²
Die Size
352 mm²

Graphics Features

10.1 (10_1)
DirectX
12 (11_1)
3.3 (full) 4.0 (partial)
OpenGL
4.6
N/A
OpenCL
1.2
N/A
Vulkan
1.2
-
-
-
4.1
Shader Model
5.1

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