Gainward GeForce RTX 3090 Phantom vs Nvidia GeForce GTX 645 OEM

VS
Gainward GeForce RTX 3090 Phantom
Gainward GeForce RTX 3090 Phantom Image
Nvidia GeForce GTX 645 OEM
Nvidia GeForce GTX 645 OEM Image
Gainward GeForce RTX 3090 Phantom
Nvidia GeForce GTX 645 OEM
Key Differences Key Differences Gainward GeForce RTX 3090 Phantom Nvidia GeForce GTX 645 OEM
GPU Base Clock Speed 1395MHz 823MHz
GPU Boost Clock Speed 1740MHz 888MHz
Pixel Rate 194.9 GPixel/s 9.88 GPixel/s
GPU Memory Speed 1219MHz 1000MHz
GPU Render Output Units (ROPs) 112 16
No. of Supported Displays Not Known 4
Performance Performance Gainward GeForce RTX 3090 Phantom Nvidia GeForce GTX 645 OEM
GPU Base Clock Speed 1395MHz 823MHz
Pixel Rate 194.9 GPixel/s 9.88 GPixel/s
FLOPS (Floating-point Performance) 36.53 TFLOPS 0.95 TFLOPS
GPU Memory Speed 1219MHz 1000MHz
Texture Filter Rate 570.7 GTexels/s 39.5 GTexels/s
Total GPU Shading Units 10496 576
Total GPU TMUs 328 48
GPU Boost Clock Speed 1740MHz 888MHz
GPU Render Output Units (ROPs) 112 16
DPFP (Double Precision Floating Point) Support No No
Features Features Gainward GeForce RTX 3090 Phantom Nvidia GeForce GTX 645 OEM
DirectX Version Info 12 11
OpenGL Driver Version 4.6 4.3
OpenCL Driver Version 2 1.1
Multi-display Tech Support Yes Yes
3D Support Yes Yes
PassMark (G3D) Score Not Known 1977
PassMark (DirectCompute) Benchmark Result Not Known 943
Ray Tracing Support Yes No
No. of Supported Displays Not Known 4
Ports Ports Gainward GeForce RTX 3090 Phantom Nvidia GeForce GTX 645 OEM
HDMI Output Support Yes Yes
GPU HDMI Version 2.1 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 Gainward GeForce RTX 3090 Phantom Nvidia GeForce GTX 645 OEM
TDP (Thermal Design Point) No Data Found No Data Found
Transistor Count 28300 million 2540 million
Semiconductor Size 8nm 28nm
PCI Express Version 4 3
Dual-GPU Support No No
Air-water Cooling Support No No
Width Size 304mm 145mm
Height 136mm 111mm
Memory Memory Gainward GeForce RTX 3090 Phantom Nvidia GeForce GTX 645 OEM
Effective Memory Clock 9750MHz 4000MHz
Max Memory Bandwidth 936GB/s 64GB/s
RAM 24GB 1GB
Memory Bus Interface Width 384bit 128bit
GDDR Memory Version 6 5
ECC (Error-Correcting Code) Memory Support No No

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