GPU Comparison
RADEON
AMD Radeon 660M
CORE STATE
Rembrandt
VRAM
System Shared
CLOCK SPEED
1900 MHz
TDP
40 W
BUS WIDTH
System Shared
ARCHITECTURE
RDNA 2.0
PROCESS
6 nm
LAUNCH DATE
2022
VS
RADEON
Radeon RX 7900 XT
CORE STATE
Navi 31
VRAM
20 GB
CLOCK SPEED
2394 MHz
TDP
300 W
BUS WIDTH
320 bit
ARCHITECTURE
RDNA 3.0
PROCESS
5 nm
LAUNCH DATE
2022
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_vulkan
3dmark_3dmark_steel_nomad_dx12
passmark_directx_10
passmark_directx_11
passmark_directx_12
passmark_directx_9
passmark_g2d
passmark_g3d
passmark_gpu_compute
DETAILED SPECIFICATIONS
SPECIFICATION
660M
RX 7900 XT
Core Specs
Shading Units
384
5,376
+1300.0%
Shaders
384
5,376
+1300.0%
TMUs
24
336
+1300.0%
ROPs
16
192
+1100.0%
Compute Units
6
84
+1300.0%
Clocks
Base Clock
1500 MHz
1387 MHz
Boost Clock
1900 MHz
2394 MHz
Game Clock
—
2025 MHz
Shader Clock
—
2025 MHz
Memory Clock
System Shared
2500 MHz
20 Gbps effective
Memory
Memory Size
System Shared
20 GB
VRAM (MB)
—
20,480
Memory Type
System Shared
GDDR6
Memory Bus
System Shared
320 bit
Bandwidth
System Dependent
800.0 GB/s
Cache
L1 Cache
128 KB per Array
256 KB per Array
L2 Cache
2 MB
6 MB
L3 Cache
—
80 MB
L0 Cache
32 KB per WGP
64 KB per WGP
Performance
Pixel Rate
30.40 GPixel/s
459.6 GPixel/s
Texture Rate
45.60 GTexel/s
804.4 GTexel/s
FP32 (TFLOPS)
1,459.2 GFLOPS
51.48 TFLOPS
FP64 (TFLOPS)
91.20 GFLOPS (1:16)
1.609 TFLOPS (1:32)
FP16 (TFLOPS)
2.918 TFLOPS (2:1)
103.0 TFLOPS (2:1)
AI/RT
RT Cores
6
84
+1300.0%
Matrix Cores
—
168
Power
TDP
40 W
300 W
TDP (W)
40
300
+650.0%
Suggested PSU
—
700 W
Power Connectors
None
2x 8-pin
Architecture
Architecture
RDNA 2.0
RDNA 3.0
GPU Name
Rembrandt
Navi 31
Codename
—
Plum Bonito
Generation
Navi II IGP
(Rembrandt Mobile)
Navi III
(RX 7000)
Process Size
6 nm
5 nm
Transistors
13,100 million
57,700 million
Die Size
208 mm²
529 mm²
Foundry
TSMC
TSMC
Density
63.0M / mm²
109.1M / mm²
AMD MCM
GCD Transistors
—
45,400 million
GCD Die Size
—
304.35 mm²
MCD Transistors
—
2,050 million x6
API Support
DirectX
12 Ultimate (12_2)
12 Ultimate (12_2)
OpenGL
4.6
4.6
Vulkan
1.4
1.4
OpenCL
2.0
2.2
Shader Model
6.8
6.8
Physical
Slot Width
IGP
Dual-slot
Length
—
276 mm
10.9 inches
Height
—
110 mm
4.3 inches
Outputs
Portable Device Dependent
1x HDMI 2.1a2x DisplayPort 2.11x USB Type-C
Bus Interface
PCIe 4.0 x8
PCIe 4.0 x16
Other
Launch Price
—
899 USD
Production
End-of-life
End-of-life
Predecessor
Vega II IGP
Navi II
Successor
Navi III IGP
Navi IV