Gigabyte GeForce RTX 2080 Ti WindForce OC vs Nvidia GeForce GTX 645 OEM

VS
Gigabyte GeForce RTX 2080 Ti WindForce OC
Gigabyte GeForce RTX 2080 Ti WindForce OC Image
Nvidia GeForce GTX 645 OEM
Nvidia GeForce GTX 645 OEM Image
Gigabyte GeForce RTX 2080 Ti WindForce OC
Nvidia GeForce GTX 645 OEM
Key Differences Key Differences Gigabyte GeForce RTX 2080 Ti WindForce OC Nvidia GeForce GTX 645 OEM
GPU Base Clock Speed 1350MHz 823MHz
GPU Boost Clock Speed 1620MHz 888MHz
Pixel Rate 142.6 GPixel/s 9.88 GPixel/s
GPU Memory Speed 1750MHz 1000MHz
GPU Render Output Units (ROPs) 88 16
No. of Supported Displays 4 4
Performance Performance Gigabyte GeForce RTX 2080 Ti WindForce OC Nvidia GeForce GTX 645 OEM
GPU Base Clock Speed 1350MHz 823MHz
Pixel Rate 142.6 GPixel/s 9.88 GPixel/s
FLOPS (Floating-point Performance) 14.1 TFLOPS 0.95 TFLOPS
GPU Memory Speed 1750MHz 1000MHz
Texture Filter Rate 440.6 GTexels/s 39.5 GTexels/s
Total GPU Shading Units 4352 576
Total GPU TMUs 272 48
GPU Boost Clock Speed 1620MHz 888MHz
GPU Render Output Units (ROPs) 88 16
DPFP (Double Precision Floating Point) Support No No
Features Features Gigabyte GeForce RTX 2080 Ti WindForce OC Nvidia GeForce GTX 645 OEM
DirectX Version Info 12 11
OpenGL Driver Version 4.5 4.3
OpenCL Driver Version 2 1.1
Multi-display Tech Support Yes Yes
3D Support Yes Yes
Multi-GPU Support Count 2 Not Known
No. of Supported Displays 4 4
PassMark (G3D) Score Not Known 1977
PassMark (DirectCompute) Benchmark Result Not Known 943
Ray Tracing Support No No
Miscellaneous Miscellaneous Gigabyte GeForce RTX 2080 Ti WindForce OC Nvidia GeForce GTX 645 OEM
No. of USB Ports 1 No Data Found
USB Type-C Support Yes No Data Found
Ports Ports Gigabyte GeForce RTX 2080 Ti WindForce OC Nvidia GeForce GTX 645 OEM
HDMI Output Support Yes Yes
GPU HDMI Version 2 Not Known
DisplayPort Output 3 1
No. of HDMI Ports 1 Not Known
DVI Output Ports 0 2
Mini DisplayPort Output 0 0
General info General info Gigabyte GeForce RTX 2080 Ti WindForce OC Nvidia GeForce GTX 645 OEM
TDP (Thermal Design Point) No Data Found No Data Found
Transistor Count 18600 million 2540 million
Semiconductor Size 12nm 28nm
PCI Express Version 3 3
Dual-GPU Support No No
Air-water Cooling Support No No
Width Size 280.35mm 145mm
Height 116.45mm 111mm
Memory Memory Gigabyte GeForce RTX 2080 Ti WindForce OC Nvidia GeForce GTX 645 OEM
Effective Memory Clock 14000MHz 4000MHz
Max Memory Bandwidth 616GB/s 64GB/s
RAM 11GB 1GB
Memory Bus Interface Width 352bit 128bit
GDDR Memory Version 6 5
ECC (Error-Correcting Code) Memory Support No No

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