GPU Comparison
RADEON
AMD Radeon RX 640 OEM
CORE STATE
Polaris 23
VRAM
4 GB
CLOCK SPEED
—
TDP
50 W
BUS WIDTH
128 bit
ARCHITECTURE
GCN 4.0
PROCESS
14 nm
LAUNCH DATE
2020
VS
GEFORCE
RTX A4000H
CORE STATE
GA104
VRAM
16 GB
CLOCK SPEED
1560 MHz
TDP
140 W
BUS WIDTH
256 bit
ARCHITECTURE
Ampere
PROCESS
8 nm
LAUNCH DATE
2021
DETAILED SPECIFICATIONS
SPECIFICATION
RX 640 OEM
RTX A4000H
Core Specs
Shading Units
640
6,144
+860.0%
Shaders
640
6,144
+860.0%
TMUs
40
192
+380.0%
ROPs
16
96
+500.0%
Compute Units
10
—
SM Count
—
48
Clocks
Base Clock
—
735 MHz
Boost Clock
—
1560 MHz
GPU Clock
1295 MHz
—
Memory Clock
1500 MHz
6 Gbps effective
1750 MHz
14 Gbps effective
Memory
Memory Size
4 GB
16 GB
VRAM (MB)
4,096
16,384
+300.0%
Memory Type
GDDR5
GDDR6
Memory Bus
128 bit
256 bit
Bandwidth
96.00 GB/s
448.0 GB/s
Cache
L1 Cache
16 KB (per CU)
128 KB (per SM)
L2 Cache
512 KB
4 MB
Performance
Pixel Rate
20.72 GPixel/s
149.8 GPixel/s
Texture Rate
51.80 GTexel/s
299.5 GTexel/s
FP32 (TFLOPS)
1.658 TFLOPS
19.17 TFLOPS
FP64 (TFLOPS)
103.6 GFLOPS (1:16)
299.5 GFLOPS (1:64)
FP16 (TFLOPS)
1.658 TFLOPS (1:1)
19.17 TFLOPS (1:1)
AI/RT
RT Cores
—
48
Tensor Cores
—
192
Power
TDP
50 W
140 W
TDP (W)
50
140
+180.0%
Suggested PSU
250 W
300 W
Power Connectors
None
1x 6-pin
Architecture
Architecture
GCN 4.0
Ampere
GPU Name
Polaris 23
GA104
Generation
Polaris
(RX 600)
Workstation Ampere
(Ax000)
Process Size
14 nm
8 nm
Transistors
2,200 million
17,400 million
Die Size
103 mm²
392 mm²
Foundry
GlobalFoundries
Samsung
Density
21.4M / mm²
44.4M / mm²
API Support
DirectX
12 (12_0)
12 Ultimate (12_2)
OpenGL
4.6
4.6
Vulkan
1.3
1.4
OpenCL
2.1
3.0
CUDA
—
8.6
Shader Model
6.7
6.8
Physical
Slot Width
Single-slot
Single-slot
Length
—
241 mm
9.5 inches
Height
—
112 mm
4.4 inches
Outputs
1x DisplayPort 1.4a2x mini-DisplayPort 1.4a
4x DisplayPort 1.4a
Bus Interface
PCIe 3.0 x8
PCIe 4.0 x16
Other
Production
End-of-life
End-of-life
Predecessor
Polaris
Quadro Turing
Successor
Vega
Workstation Ada