Home GPU Comparison ATI Radeon HD 4870 Mac Edition vs AMD Radeon HD 6390

ATI Radeon HD 4870 Mac Edition vs AMD Radeon HD 6390

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4870 Mac Edition and 1024MB VRAM Radeon HD 6390 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 16.00GB/s)
480 additional rendering cores
AMD Radeon HD 6390 's Advantages
Released 2 years and 6 months late
More VRAM (1024GB vs 512GB)
Lower TDP (39W vs 150W)

Score

Benchmark

FP32 (float)
Radeon HD 4870 Mac Edition +240%
1.2 TFLOPS
Radeon HD 6390
0.352 TFLOPS
VS

Graphics Card

Jan 2009
Release Date
Jul 2011
Radeon R700
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16

Clock Speeds

-
-
-
-
-
-
850 MHz
Memory Clock
500 MHz

Memory

512MB
Memory Size
1024MB
GDDR5
Memory Type
DDR2
256bit
Memory Bus
128bit
108.8GB/s
Bandwidth
16.00GB/s

Render Config

10
Compute Units
4
-
-
-
800
Shading Units
320
40
TMUs
16
16
ROPs
8
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
8 KB (per CU)
256 KB
L2 Cache
256 KB
-
-
-

Theoretical Performance

12.00 GPixel/s
Pixel Rate
4.400 GPixel/s
30.00 GTexel/s
Texture Rate
8.800 GTexel/s
-
-
-
1200 GFLOPS
FP32 (float)
352.0 GFLOPS
240.0 GFLOPS
FP64 (double)
-

Board Design

150W
TDP
39W
450 W
Suggested PSU
200 W
1x DVI 1x mini-DisplayPort 1.0
Outputs
1x DVI 1x HDMI 1.3a 1x VGA
2x 6-pin
Power Connectors
None

Graphics Processor

RV770
GPU Name
Redwood
RV770 XT Mac (215-0669080)
GPU Variant
Redwood LE
TeraScale
Architecture
TeraScale 2
TSMC
Foundry
TSMC
55 nm
Process Size
40 nm
0.956 billion
Transistors
0.627 billion
256 mm²
Die Size
104 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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