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GPU Comparison
AMD Radeon RX 6900 XTX vs ATI Radeon HD 3870 AGP
AMD Radeon RX 6900 XTX vs ATI Radeon HD 3870 AGP
VS
AMD Radeon RX 6900 XTX
ATI Radeon HD 3870 AGP
We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6900 XTX and 512MB VRAM Radeon HD 3870 AGP to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon RX 6900 XTX 's Advantages
Boost Clock2435MHz
Larger VRAM bandwidth (576.0GB/s vs 72.06GB/s)
4800 additional rendering cores
ATI Radeon HD 3870 AGP 's Advantages
Lower TDP (106W vs 330W)
Score
Benchmark
FP32 (float)
Radeon RX 6900 XTX
+4916%
24.93 TFLOPS
Radeon HD 3870 AGP
0.497 TFLOPS
Radeon RX 6900 XTX
VS
Radeon HD 3870 AGP
Graphics Card
Unknown
Release Date
Unknown
Navi II
Generation
Radeon R600
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
AGP 8x
Clock Speeds
2075 MHz
Base Clock
-
2435 MHz
Boost Clock
-
2250 MHz
Memory Clock
1126 MHz
Memory
16GB
Memory Size
512MB
GDDR6
Memory Type
GDDR4
256bit
Memory Bus
256bit
576.0GB/s
Bandwidth
72.06GB/s
Render Config
-
SM Count
-
80
Compute Units
4
5120
Shading Units
320
320
TMUs
16
128
ROPs
16
-
Tensor Cores
-
80
RT Cores
-
128 KB per Array
L1 Cache
-
4 MB
L2 Cache
256 KB
Theoretical Performance
311.7 GPixel/s
Pixel Rate
12.43 GPixel/s
779.2 GTexel/s
Texture Rate
12.43 GTexel/s
49.87 TFLOPS
FP16 (half)
-
24.93 TFLOPS
FP32 (float)
497.3 GFLOPS
1.558 TFLOPS
FP64 (double)
99.46 GFLOPS
Graphics Processor
Navi 21
GPU Name
RV670
Navi 21 XTXH (215-121000247)
GPU Variant
RV670 XT (215-0708005)
RDNA 2.0
Architecture
TeraScale
TSMC
Foundry
TSMC
7 nm
Process Size
55 nm
26.8 billion
Transistors
0.666 billion
520 mm²
Die Size
192 mm²
Board Design
330W
TDP
106W
700 W
Suggested PSU
300 W
1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C
Outputs
2x DVI 1x S-Video
2x 8-pin
Power Connectors
1x 8-pin
Graphics Features
12 Ultimate (12_2)
DirectX
10.1 (10_1)
4.6
OpenGL
3.3 (full) 4.0 (partial)
2.1
OpenCL
N/A
1.3
Vulkan
N/A
-
CUDA
-
6.5
Shader Model
4.1
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8
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