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GPU Comparison
ATI Radeon HD 4870 Mac Edition vs AMD Radeon HD 6850
ATI Radeon HD 4870 Mac Edition vs AMD Radeon HD 6850
VS
ATI Radeon HD 4870 Mac Edition
AMD Radeon HD 6850
We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 4870 Mac Edition and 1024MB VRAM Radeon HD 6850 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon HD 6850 's Advantages
Released 1 years and 9 months late
More VRAM (1024GB vs 512GB)
Larger VRAM bandwidth (128.0GB/s vs 108.8GB/s)
160 additional rendering cores
Lower TDP (127W vs 150W)
Score
Benchmark
FP32 (float)
Radeon HD 4870 Mac Edition
1.2 TFLOPS
Radeon HD 6850
+24%
1.488 TFLOPS
Radeon HD 4870 Mac Edition
VS
Radeon HD 6850
Graphics Card
Jan 2009
Release Date
Oct 2010
Radeon R700
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
850 MHz
Memory Clock
1000 MHz
Memory
512MB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
256bit
108.8GB/s
Bandwidth
128.0GB/s
Render Config
-
SM Count
-
10
Compute Units
12
800
Shading Units
960
40
TMUs
48
16
ROPs
32
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
8 KB (per CU)
256 KB
L2 Cache
512 KB
Theoretical Performance
12.00 GPixel/s
Pixel Rate
24.80 GPixel/s
30.00 GTexel/s
Texture Rate
37.20 GTexel/s
-
FP16 (half)
-
1200 GFLOPS
FP32 (float)
1488 GFLOPS
240.0 GFLOPS
FP64 (double)
-
Graphics Processor
RV770
GPU Name
Barts
RV770 XT Mac (215-0669080)
GPU Variant
Barts PRO (215-0798006)
TeraScale
Architecture
TeraScale 2
TSMC
Foundry
TSMC
55 nm
Process Size
40 nm
0.956 billion
Transistors
1.7 billion
256 mm²
Die Size
255 mm²
Board Design
150W
TDP
127W
450 W
Suggested PSU
300 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
1x 6-pin
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
-
CUDA
-
4.1
Shader Model
5.0
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