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GPU Comparison
AMD Radeon HD 7970 vs ATI Radeon HD 3870
AMD Radeon HD 7970 vs ATI Radeon HD 3870
VS
AMD Radeon HD 7970
ATI Radeon HD 3870
We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 and 512MB VRAM Radeon HD 3870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon HD 7970 's Advantages
Released 4 years and 1 months late
Larger VRAM bandwidth (264.0GB/s vs 72.06GB/s)
1728 additional rendering cores
ATI Radeon HD 3870 's Advantages
Lower TDP (106W vs 250W)
Score
Benchmark
FP32 (float)
Radeon HD 7970
+662%
3.789 TFLOPS
Radeon HD 3870
0.497 TFLOPS
Radeon HD 7970
VS
Radeon HD 3870
Graphics Card
Dec 2011
Release Date
Nov 2007
Southern Islands
Generation
Radeon R600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1375 MHz
Memory Clock
1126 MHz
Memory
3GB
Memory Size
512MB
GDDR5
Memory Type
GDDR4
384bit
Memory Bus
256bit
264.0GB/s
Bandwidth
72.06GB/s
Render Config
-
SM Count
-
32
Compute Units
4
2048
Shading Units
320
128
TMUs
16
32
ROPs
16
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
-
768 KB
L2 Cache
256 KB
Theoretical Performance
29.60 GPixel/s
Pixel Rate
12.43 GPixel/s
118.4 GTexel/s
Texture Rate
12.43 GTexel/s
-
FP16 (half)
-
3.789 TFLOPS
FP32 (float)
497.3 GFLOPS
947.2 GFLOPS
FP64 (double)
99.46 GFLOPS
Graphics Processor
Tahiti
GPU Name
RV670
Tahiti XT (215-0821060)
GPU Variant
RV670 XT (215-0708005)
GCN 1.0
Architecture
TeraScale
TSMC
Foundry
TSMC
28 nm
Process Size
55 nm
4.313 billion
Transistors
0.666 billion
352 mm²
Die Size
192 mm²
Board Design
250W
TDP
106W
600 W
Suggested PSU
300 W
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
Outputs
2x DVI 1x S-Video
1x 6-pin + 1x 8-pin
Power Connectors
1x 6-pin
Graphics Features
12 (11_1)
DirectX
10.1 (10_1)
4.6
OpenGL
3.3 (full) 4.0 (partial)
1.2
OpenCL
N/A
1.2
Vulkan
N/A
-
CUDA
-
5.1
Shader Model
4.1
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