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GPU Comparison
AMD Radeon RX 6900 XT vs AMD Radeon HD 6870
AMD Radeon RX 6900 XT vs AMD Radeon HD 6870
VS
AMD Radeon RX 6900 XT
AMD Radeon HD 6870
We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6900 XT and 1024MB VRAM Radeon HD 6870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon RX 6900 XT 's Advantages
Released 10 years late
Boost Clock2250MHz
More VRAM (16GB vs 1024GB)
Larger VRAM bandwidth (512.0GB/s vs 134.4GB/s)
4000 additional rendering cores
AMD Radeon HD 6870 's Advantages
Lower TDP (151W vs 300W)
Score
Benchmark
FP32 (float)
Radeon RX 6900 XT
+1042%
23.04 TFLOPS
Radeon HD 6870
2.016 TFLOPS
Radeon RX 6900 XT
VS
Radeon HD 6870
Graphics Card
Oct 2020
Release Date
Oct 2010
Navi II
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
1825 MHz
Base Clock
-
2250 MHz
Boost Clock
-
2000 MHz
Memory Clock
1050 MHz
Memory
16GB
Memory Size
1024MB
GDDR6
Memory Type
GDDR5
256bit
Memory Bus
256bit
512.0GB/s
Bandwidth
134.4GB/s
Render Config
80
Compute Units
14
-
-
-
5120
Shading Units
1120
320
TMUs
56
128
ROPs
32
-
-
-
80
RT Cores
-
128 KB per Array
L1 Cache
8 KB (per CU)
4 MB
L2 Cache
512 KB
128 MB
L3 Cache
-
Theoretical Performance
288.0 GPixel/s
Pixel Rate
28.80 GPixel/s
720.0 GTexel/s
Texture Rate
50.40 GTexel/s
46.08 TFLOPS
FP16 (half)
-
23.04 TFLOPS
FP32 (float)
2.016 TFLOPS
1440 GFLOPS
FP64 (double)
-
Board Design
300W
TDP
151W
700 W
Suggested PSU
450 W
1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C
Outputs
2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1
2x 8-pin
Power Connectors
2x 6-pin
Graphics Processor
Navi 21
GPU Name
Barts
Navi 21 XTX (215-121000167)
GPU Variant
Barts XT (215-0798000)
RDNA 2.0
Architecture
TeraScale 2
TSMC
Foundry
TSMC
7 nm
Process Size
40 nm
26.8 billion
Transistors
1.7 billion
520 mm²
Die Size
255 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
2.1
OpenCL
1.2
1.3
Vulkan
N/A
-
-
-
6.5
Shader Model
5.0
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