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GPU Comparison
ATI Radeon HD 3870 AGP vs AMD Radeon R9 285
ATI Radeon HD 3870 AGP vs AMD Radeon R9 285
VS
ATI Radeon HD 3870 AGP
AMD Radeon R9 285
We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 3870 AGP and 2GB VRAM Radeon R9 285 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
ATI Radeon HD 3870 AGP 's Advantages
Lower TDP (106W vs 190W)
AMD Radeon R9 285 's Advantages
More VRAM (2GB vs 512GB)
Larger VRAM bandwidth (176.0GB/s vs 72.06GB/s)
1472 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon HD 3870 AGP
0.497 TFLOPS
Radeon R9 285
+561%
3.29 TFLOPS
Radeon HD 3870 AGP
VS
Radeon R9 285
Graphics Card
Unknown
Release Date
Sep 2014
Radeon R600
Generation
Volcanic Islands
Desktop
Type
Desktop
AGP 8x
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
-
-
-
-
-
1126 MHz
Memory Clock
1375 MHz
Memory
512MB
Memory Size
2GB
GDDR4
Memory Type
GDDR5
256bit
Memory Bus
256bit
72.06GB/s
Bandwidth
176.0GB/s
Render Config
4
Compute Units
28
-
-
-
320
Shading Units
1792
16
TMUs
112
16
ROPs
32
-
-
-
-
-
-
-
L1 Cache
16 KB (per CU)
256 KB
L2 Cache
512 KB
-
-
-
Theoretical Performance
12.43 GPixel/s
Pixel Rate
29.38 GPixel/s
12.43 GTexel/s
Texture Rate
102.8 GTexel/s
-
FP16 (half)
3.290 TFLOPS
497.3 GFLOPS
FP32 (float)
3.290 TFLOPS
99.46 GFLOPS
FP64 (double)
205.6 GFLOPS
Board Design
106W
TDP
190W
300 W
Suggested PSU
450 W
2x DVI 1x S-Video
Outputs
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
1x 8-pin
Power Connectors
2x 6-pin
Graphics Processor
RV670
GPU Name
Tonga
RV670 XT (215-0708005)
GPU Variant
Tonga PRO (215-0851128)
TeraScale
Architecture
GCN 3.0
TSMC
Foundry
TSMC
55 nm
Process Size
28 nm
0.666 billion
Transistors
5 billion
192 mm²
Die Size
366 mm²
Graphics Features
10.1 (10_1)
DirectX
12 (12_0)
3.3 (full) 4.0 (partial)
OpenGL
4.6
N/A
OpenCL
2.1
N/A
Vulkan
1.2.170
-
-
-
4.1
Shader Model
6.5
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