Galax GeForce RTX 2080 SG Edition vs Zotac GeForce GT 640 2GB

VS
Galax GeForce RTX 2080 SG Edition
Galax GeForce RTX 2080 SG Edition Image
Zotac GeForce GT 640 2GB
Zotac GeForce GT 640 2GB Image
Galax GeForce RTX 2080 SG Edition
Zotac GeForce GT 640 2GB
Key Differences Key Differences Galax GeForce RTX 2080 SG Edition Zotac GeForce GT 640 2GB
GPU Base Clock Speed 1515MHz 1046MHz
GPU Boost Clock Speed 1800MHz Not Known
Pixel Rate 115.2 GPixel/s 7.22 GPixel/s
GPU Memory Speed 1750MHz 1250MHz
GPU Render Output Units (ROPs) 64 16
No. of Supported Displays 4 Not Known
Performance Performance Galax GeForce RTX 2080 SG Edition Zotac GeForce GT 640 2GB
GPU Base Clock Speed 1515MHz 1046MHz
Pixel Rate 115.2 GPixel/s 7.22 GPixel/s
FLOPS (Floating-point Performance) 10.6 TFLOPS 0.69 TFLOPS
Texture Filter Rate 331.2 GTexels/s 28.8 GTexels/s
GPU Memory Speed 1750MHz 1250MHz
Total GPU Shading Units 2944 384
Total GPU TMUs 184 32
GPU Boost Clock Speed 1800MHz Not Known
GPU Render Output Units (ROPs) 64 16
DPFP (Double Precision Floating Point) Support No No
Features Features Galax GeForce RTX 2080 SG Edition Zotac GeForce GT 640 2GB
DirectX Version Info 12 11
OpenGL Driver Version 4.6 4.3
OpenCL Driver Version 1.2 1.1
Multi-display Tech Support Yes Yes
GPU Temperature Under Load 74°C Not Known
Idle GPU Temperature 30°C Not Known
3D Support Yes Yes
Noise Level Under Load 45dB Not Known
Idle Noise Level 40.3dB Not Known
Idle Power Consumption 53W Not Known
Multi-GPU Support Count 2 Not Known
No. of Supported Displays 4 Not Known
Ray Tracing Support No No
Miscellaneous Miscellaneous Galax GeForce RTX 2080 SG Edition Zotac GeForce GT 640 2GB
No. of USB Ports 1 No Data Found
USB Type-C Support Yes No Data Found
Ports Ports Galax GeForce RTX 2080 SG Edition Zotac GeForce GT 640 2GB
HDMI Output Support Yes Yes
GPU HDMI Version 2 Not Known
DisplayPort Output 3 0
No. of HDMI Ports 1 Not Known
DVI Output Ports 0 1
Mini DisplayPort Output 0 0
General info General info Galax GeForce RTX 2080 SG Edition Zotac GeForce GT 640 2GB
TDP (Thermal Design Point) No Data Found No Data Found
Transistor Count 13600 million 1270 million
Semiconductor Size 12nm 28nm
PCI Express Version 3 3
Dual-GPU Support No No
Air-water Cooling Support No No
Width Size 308mm 145mm
Height Not Known 111mm
Memory Memory Galax GeForce RTX 2080 SG Edition Zotac GeForce GT 640 2GB
Effective Memory Clock 14000MHz 5000MHz
Max Memory Bandwidth 448GB/s 28.5GB/s
RAM 8GB 2GB
Memory Bus Interface Width 256bit 128bit
GDDR Memory Version 6 5
ECC (Error-Correcting Code) Memory Support No No

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