AMD Radeon HD 8990 OEM vs AMD Radeon RX 6600S
GPU Specs Compare
Graphics Card
Release Date
Apr 2013
Jan 2022
Generation
Sea Islands
Mobility Radeon
Type
Desktop
Mobile
Bus Interface
PCIe 3.0 x16
PCIe 4.0 x8
Clock Speeds
Base Clock
950 MHz
1700 MHz
Boost Clock
1000 MHz
2000 MHz
Memory Clock
1500 MHz
1750 MHz
Memory
Memory Size
3GB
4GB
Memory Type
GDDR5
GDDR6
Memory Bus
384bit
128bit
Bandwidth
288.0GB/s
224.0GB/s
Render Config
Compute Units
32
28
Shading Units
2048
1792
TMUs
128
112
ROPs
32
64
L1 Cache
16 KB (per CU)
128 KB per Array
L2 Cache
768 KB
2 MB
RT Cores
-
28
L3 Cache
-
32 MB
Theoretical Performance
Pixel Rate
32.00 GPixel/s
128.0 GPixel/s
Texture Rate
128.0 GTexel/s
224.0 GTexel/s
FP32 (float)
4.096 TFLOPS
7.168 TFLOPS
FP64 (double)
1024 GFLOPS
448.0 GFLOPS
FP16 (half)
-
14.34 TFLOPS
Graphics Processor
GPU Name
Malta
Navi 23
GPU Variant
Malta XT(215-0849026)
-
Architecture
GCN 1.0
RDNA 2.0
Foundry
TSMC
TSMC
Process Size
28 nm
7 nm
Transistors
4.313 billion
11.06 billion
Die Size
365 mm²
237 mm²
Board Design
TDP
375W
80W
Suggested PSU
750 W
-
Outputs
1x DVI4x mini-DisplayPort 1.2
No outputs
Power Connectors
2x 8-pin
None
Graphics Features
DirectX
12 (11_1)
12 Ultimate (12_2)
OpenGL
4.6
4.6
OpenCL
1.2
2.1
Vulkan
1.2
1.3
Shader Model
5.1
6.5
📊 Benchmark
3DMark Time Spy
-
7,700
3DMark Time Spy Extreme
-
3,389