Home GPU Comparison ATI Radeon HD 4870 Mac Edition vs AMD Radeon HD 6770 Green Edition

ATI Radeon HD 4870 Mac Edition vs AMD Radeon HD 6770 Green Edition

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4870 Mac Edition and 2GB VRAM Radeon HD 6770 Green Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 4870 Mac Edition 's Advantages
Larger VRAM bandwidth (108.8GB/s vs 21.34GB/s)
80 additional rendering cores
AMD Radeon HD 6770 Green Edition 's Advantages
Released 4 years and 3 months late
More VRAM (2GB vs 512GB)
Lower TDP (86W vs 150W)

Score

Benchmark

FP32 (float)
Radeon HD 4870 Mac Edition +19%
1.2 TFLOPS
Radeon HD 6770 Green Edition
1.008 TFLOPS
VS

Graphics Card

Jan 2009
Release Date
Apr 2013
Radeon R700
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16

Clock Speeds

-
-
-
-
-
-
850 MHz
Memory Clock
667 MHz

Memory

512MB
Memory Size
2GB
GDDR5
Memory Type
GDDR3
256bit
Memory Bus
128bit
108.8GB/s
Bandwidth
21.34GB/s

Render Config

10
Compute Units
9
-
-
-
800
Shading Units
720
40
TMUs
36
16
ROPs
16
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
8 KB (per CU)
256 KB
L2 Cache
256 KB
-
-
-

Theoretical Performance

12.00 GPixel/s
Pixel Rate
11.20 GPixel/s
30.00 GTexel/s
Texture Rate
25.20 GTexel/s
-
-
-
1200 GFLOPS
FP32 (float)
1008 GFLOPS
240.0 GFLOPS
FP64 (double)
-

Board Design

150W
TDP
86W
450 W
Suggested PSU
250 W
1x DVI 1x mini-DisplayPort 1.0
Outputs
2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1
2x 6-pin
Power Connectors
-

Graphics Processor

RV770
GPU Name
Juniper
RV770 XT Mac (215-0669080)
GPU Variant
Juniper LE (215-0754009)
TeraScale
Architecture
TeraScale 2
TSMC
Foundry
TSMC
55 nm
Process Size
40 nm
0.956 billion
Transistors
1.04 billion
256 mm²
Die Size
166 mm²

Graphics Features

10.1 (10_1)
DirectX
11.2 (11_0)
3.3
OpenGL
4.4
1.1
OpenCL
1.2
N/A
Vulkan
N/A
-
-
-
4.1
Shader Model
5.0

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