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GPU Comparison
AMD Radeon HD 6870 vs ATI Radeon HD 3850 AGP
AMD Radeon HD 6870 vs ATI Radeon HD 3850 AGP
VS
AMD Radeon HD 6870
ATI Radeon HD 3850 AGP
We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 and 512MB VRAM Radeon HD 3850 AGP to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon HD 6870 's Advantages
Released 2 years and 9 months late
More VRAM (1024GB vs 512GB)
Larger VRAM bandwidth (134.4GB/s vs 52.99GB/s)
800 additional rendering cores
ATI Radeon HD 3850 AGP 's Advantages
Lower TDP (75W vs 151W)
Score
Benchmark
FP32 (float)
Radeon HD 6870
+371%
2.016 TFLOPS
Radeon HD 3850 AGP
0.428 TFLOPS
Radeon HD 6870
VS
Radeon HD 3850 AGP
Graphics Card
Oct 2010
Release Date
Jan 2008
Northern Islands
Generation
Radeon R600
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
AGP 8x
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1050 MHz
Memory Clock
828 MHz
Memory
1024MB
Memory Size
512MB
GDDR5
Memory Type
GDDR3
256bit
Memory Bus
256bit
134.4GB/s
Bandwidth
52.99GB/s
Render Config
-
SM Count
-
14
Compute Units
4
1120
Shading Units
320
56
TMUs
16
32
ROPs
16
-
Tensor Cores
-
-
RT Cores
-
8 KB (per CU)
L1 Cache
-
512 KB
L2 Cache
256 KB
Theoretical Performance
28.80 GPixel/s
Pixel Rate
10.69 GPixel/s
50.40 GTexel/s
Texture Rate
10.69 GTexel/s
-
FP16 (half)
-
2.016 TFLOPS
FP32 (float)
427.5 GFLOPS
-
FP64 (double)
85.50 GFLOPS
Graphics Processor
Barts
GPU Name
RV670
Barts XT (215-0798000)
GPU Variant
RV670 PRO (215-0708003)
TeraScale 2
Architecture
TeraScale
TSMC
Foundry
TSMC
40 nm
Process Size
55 nm
1.7 billion
Transistors
0.666 billion
255 mm²
Die Size
192 mm²
Board Design
151W
TDP
75W
450 W
Suggested PSU
250 W
2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1
Outputs
2x DVI 1x S-Video
2x 6-pin
Power Connectors
1x 8-pin
Graphics Features
11.2 (11_0)
DirectX
10.1 (10_1)
4.4
OpenGL
3.3 (full) 4.0 (partial)
1.2
OpenCL
N/A
N/A
Vulkan
N/A
-
CUDA
-
5.0
Shader Model
4.1
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