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GPU Comparison
AMD Radeon RX 6900 XTX vs AMD Radeon HD 8870 OEM
AMD Radeon RX 6900 XTX vs AMD Radeon HD 8870 OEM
VS
AMD Radeon RX 6900 XTX
AMD Radeon HD 8870 OEM
We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6900 XTX and 2GB VRAM Radeon HD 8870 OEM 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
More VRAM (16GB vs 2GB)
Larger VRAM bandwidth (576.0GB/s vs 153.6GB/s)
3840 additional rendering cores
AMD Radeon HD 8870 OEM 's Advantages
Lower TDP (175W vs 330W)
Score
Benchmark
FP32 (float)
Radeon RX 6900 XTX
+873%
24.93 TFLOPS
Radeon HD 8870 OEM
2.56 TFLOPS
Radeon RX 6900 XTX
VS
Radeon HD 8870 OEM
Graphics Card
Unknown
Release Date
Jan 2013
Navi II
Generation
Sea Islands
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
2075 MHz
Base Clock
-
2435 MHz
Boost Clock
-
2250 MHz
Memory Clock
1200 MHz
Memory
16GB
Memory Size
2GB
GDDR6
Memory Type
GDDR5
256bit
Memory Bus
256bit
576.0GB/s
Bandwidth
153.6GB/s
Render Config
80
Compute Units
20
-
-
-
5120
Shading Units
1280
320
TMUs
80
128
ROPs
32
-
-
-
80
RT Cores
-
128 KB per Array
L1 Cache
16 KB (per CU)
4 MB
L2 Cache
512 KB
128 MB
L3 Cache
-
Theoretical Performance
311.7 GPixel/s
Pixel Rate
32.00 GPixel/s
779.2 GTexel/s
Texture Rate
80.00 GTexel/s
49.87 TFLOPS
FP16 (half)
-
24.93 TFLOPS
FP32 (float)
2.560 TFLOPS
1.558 TFLOPS
FP64 (double)
160.0 GFLOPS
Board Design
330W
TDP
175W
700 W
Suggested PSU
450 W
1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C
Outputs
1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
2x 8-pin
Power Connectors
2x 6-pin
Graphics Processor
Navi 21
GPU Name
Pitcairn
Navi 21 XTXH (215-121000247)
GPU Variant
Pitcairn XT (215-0828047)
RDNA 2.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
7 nm
Process Size
28 nm
26.8 billion
Transistors
2.8 billion
520 mm²
Die Size
212 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
12 (11_1)
4.6
OpenGL
4.6
2.1
OpenCL
1.2
1.3
Vulkan
1.2
-
-
-
6.5
Shader Model
5.1
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