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GPU Comparison
AMD Radeon RX 6600M vs AMD Radeon HD 6990M
AMD Radeon RX 6600M vs AMD Radeon HD 6990M
VS
AMD Radeon RX 6600M
AMD Radeon HD 6990M
We compared two Mobile platform GPUs: 8GB VRAM Radeon RX 6600M and 2GB VRAM Radeon HD 6990M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon RX 6600M 's Advantages
Released 9 years and 10 months late
Boost Clock2416MHz
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (224.0GB/s vs 115.2GB/s)
672 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon RX 6600M
+440%
8.659 TFLOPS
Radeon HD 6990M
1.602 TFLOPS
Radeon RX 6600M
VS
Radeon HD 6990M
Graphics Card
May 2021
Release Date
Jul 2011
Mobility Radeon
Generation
Vancouver
Mobile
Type
Mobile
PCIe 4.0 x8
Bus Interface
MXM-B (3.0)
Clock Speeds
2068 MHz
Base Clock
-
2416 MHz
Boost Clock
-
1750 MHz
Memory Clock
900 MHz
Memory
8GB
Memory Size
2GB
GDDR6
Memory Type
GDDR5
128bit
Memory Bus
256bit
224.0GB/s
Bandwidth
115.2GB/s
Render Config
-
SM Count
-
28
Compute Units
14
1792
Shading Units
1120
112
TMUs
56
64
ROPs
32
-
Tensor Cores
-
28
RT Cores
-
128 KB per Array
L1 Cache
8 KB (per CU)
2 MB
L2 Cache
512 KB
Theoretical Performance
154.6 GPixel/s
Pixel Rate
22.88 GPixel/s
270.6 GTexel/s
Texture Rate
40.04 GTexel/s
17.32 TFLOPS
FP16 (half)
-
8.659 TFLOPS
FP32 (float)
1.602 TFLOPS
541.2 GFLOPS
FP64 (double)
-
Graphics Processor
Navi 23
GPU Name
Blackcomb
-
GPU Variant
Blackcomb XTX (216-0811030)
RDNA 2.0
Architecture
TeraScale 2
TSMC
Foundry
TSMC
7 nm
Process Size
40 nm
11.06 billion
Transistors
1.7 billion
237 mm²
Die Size
212 mm²
Board Design
100W
TDP
100W
-
Suggested PSU
-
No outputs
Outputs
No outputs
None
Power Connectors
None
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
-
CUDA
-
6.5
Shader Model
5.0
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