Radeon HD 3850 X3 vs Radeon HD 4870 Mac Edition
We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 3850 X3 and 512MB VRAM Radeon HD 4870 Mac Edition to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon HD 3850 X3 Advantages
Lower TDP (145W vs 150W)
Radeon HD 4870 Mac Edition Advantages
Larger VRAM bandwidth (108.8GB/s vs 54.40GB/s)
480 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon HD 3850 X3
428
Radeon HD 4870 Mac Edition
+180%
1200
Graphics Card
Unknown
Release Date
Jan 2009
Radeon R600
Generation
Radeon R700
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
850 MHz
Memory Clock
850 MHz
Memory
512MB
Memory Size
512MB
GDDR3
Memory Type
GDDR5
256bit
Memory Bus
256bit
54.40GB/s
Bandwidth
108.8GB/s
Render Config
4
Compute Units
10
320
Shading Units
800
16
TMUs
40
16
ROPs
16
-
L1 Cache
16 KB (per CU)
256 KB
L2 Cache
256 KB
Theoretical Performance
10.70 GPixel/s
Pixel Rate
12.00 GPixel/s
10.70 GTexel/s
Texture Rate
30.00 GTexel/s
428.2 GFLOPS
FP32 (float)
1200 GFLOPS
-
FP64 (double)
240.0 GFLOPS
Board Design
145W
TDP
150W
300 W
Suggested PSU
450 W
4x DVI
Outputs
1x DVI
1x mini-DisplayPort 1.0
1x mini-DisplayPort 1.0
1x 8-pin
Power Connectors
2x 6-pin
Graphics Processor
RV670
GPU Name
RV770
RV670 PRO
(215-0708003)
(215-0708003)
GPU Variant
RV770 XT Mac
(215-0669080)
(215-0669080)
TeraScale
Architecture
TeraScale
TSMC
Foundry
TSMC
55 nm
Process Size
55 nm
0.666 billion
Transistors
0.956 billion
192 mm²
Die Size
256 mm²
Graphics Features
10.1 (10_1)
DirectX
10.1 (10_1)
3.3 (full)
4.0 (partial)
4.0 (partial)
OpenGL
3.3
N/A
OpenCL
1.1
N/A
Vulkan
N/A
4.1
Shader Model
4.1
