Zotac GTS 450 vs Zotac GT 545

I am deciding which of the two GPU is better. The GTS 450 has a faster speed clock, but GT 545 has a better memory. Can you please help. Thank you

Zotac GTS 450

http://www.microcenter.com/single_product_results.phtml...

GPU Manufacturer NVIDIA

GPU Chipset GeForce GTS 450

Number of GPUs 1

Overclocked No

Core Clock Speed 810MHz

RAMDAC Clock Speed 400MHz

Shader Clock 1620MHz

CUDA Processors 192

Texture Fill Rate 25.1GT/s

Maximum Digital Resolution 2560x1600

Maximum Analog Resolution 2048x1536

Video Memory 1024MB

Memory Type GDDR3

Memory Clock Speed 1600MHz (3200MHz Effective)

Memory Bus 128-bit

Memory Bandwidth 57.7GB/sec


Zotac GT 545

http://www.microcenter.com/single_product_results.phtml...

GPU Manufacturer NVIDIA

GPU Chipset GeForce GT 545

Number of GPUs 1

Overclocked No

Core Clock Speed 720MHz

RAMDAC Clock Speed 400MHz

Shader Clock 1440MHz

CUDA Processors 144

Texture Fill Rate 17GT/s

Maximum Digital Resolution 2560x1600

Maximum Analog Resolution 2048x1536

Video Memory 1536MB

Memory Type DDR3

Memory Clock Speed 1800MHz (3600MHz Effective)

Memory Bus 192-bit

Memory Bandwidth 43GB/sec