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GPU Comparison
AMD Radeon HD 6970 vs ATI Radeon HD 4870 Mac Edition
AMD Radeon HD 6970 vs ATI Radeon HD 4870 Mac Edition
VS
AMD Radeon HD 6970
ATI Radeon HD 4870 Mac Edition
We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6970 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
AMD Radeon HD 6970 's Advantages
Released 1 years and 11 months late
More VRAM (2GB vs 512GB)
Larger VRAM bandwidth (176.0GB/s vs 108.8GB/s)
736 additional rendering cores
ATI Radeon HD 4870 Mac Edition 's Advantages
Lower TDP (150W vs 250W)
Score
Benchmark
FP32 (float)
Radeon HD 6970
+125%
2.703 TFLOPS
Radeon HD 4870 Mac Edition
1.2 TFLOPS
Radeon HD 6970
VS
Radeon HD 4870 Mac Edition
Graphics Card
Dec 2010
Release Date
Jan 2009
Northern Islands
Generation
Radeon R700
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
-
-
-
-
-
1375 MHz
Memory Clock
850 MHz
Memory
2GB
Memory Size
512MB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
256bit
176.0GB/s
Bandwidth
108.8GB/s
Render Config
24
Compute Units
10
-
-
-
1536
Shading Units
800
96
TMUs
40
32
ROPs
16
-
-
-
-
-
-
8 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
256 KB
-
-
-
Theoretical Performance
28.16 GPixel/s
Pixel Rate
12.00 GPixel/s
84.48 GTexel/s
Texture Rate
30.00 GTexel/s
-
-
-
2.703 TFLOPS
FP32 (float)
1200 GFLOPS
675.8 GFLOPS
FP64 (double)
240.0 GFLOPS
Board Design
250W
TDP
150W
600 W
Suggested PSU
450 W
2x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
Outputs
1x DVI 1x mini-DisplayPort 1.0
1x 6-pin + 1x 8-pin
Power Connectors
2x 6-pin
Graphics Processor
Cayman
GPU Name
RV770
Cayman XT (215-0807007)
GPU Variant
RV770 XT Mac (215-0669080)
TeraScale 3
Architecture
TeraScale
TSMC
Foundry
TSMC
40 nm
Process Size
55 nm
2.64 billion
Transistors
0.956 billion
389 mm²
Die Size
256 mm²
Graphics Features
11.2 (11_0)
DirectX
10.1 (10_1)
4.4
OpenGL
3.3
1.2
OpenCL
1.1
N/A
Vulkan
N/A
-
-
-
5.0
Shader Model
4.1
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