Graphics card (Question).

Hi, I'm Adam. I'm wondering If this graphic card right here: MSI GeForce GTX 750 2GB PhysX CUDA, Is better than this: Nvidia Geforce GTX 580?

And this one: ZOTAC GeForce GT 730 4GB PhysX CUDA.

Here's Info About Zotac:

ZOTAC GeForce® GT 730 4GB w/Low Profile Bracket

GPU : GeForce GTX 730, 384 cores, 28nm
GPU Clockspeed : 902 MHz (base)
Memory : 4096MB DDR3 (64 bit)
Memory Clockspeed : 1.8 Gbps
Bus : PCI-Express 2.0
Video-Features : HDMI 1.4a
Cooling : 1-Slot Heatsink
Connectivity : DL-DVI-D, HDMI, VGA
Product Size : 145mm(L) x 111mm(W) x 36mm (H)
Graphics card require:

PCI Express-compliant motherboard with one dual-width x16 graphics slot
Minimum 300W or greater system power supply
Microsoft Windows 8, Windows 7, Vista, XP
Key Features

NVIDIA Adaptive Vertical Sync
NVIDIA PhysX® technology
NVIDIA CUDA® technology
NVIDIA 3D Vision®-Ready
Microsoft DirectX 12 (feature level 11_0)
Open GL 4.4
PCI Express 2.0 support
Hardware Video Decode Acceleration
Blu-ray 3D ready
Get the best gaming, with NVIDIA GeForce Experience™ one-click drivers and settings

Special bundle

Boost Premium (NeroVision Xtra - XBMC - UNiGiNE)
1 x Low-profile bracket [DVI + HDMI]
1 x Low-profile bracket [VGA]

And the other one:

MSI GeForce® GTX 750 2GB "OC"

GPU : GeForce GTX 750, 512 cores, 28nm
GPU Clockspeed : 1137 MHz (boost) / 1059 MHz (base)
Memory : 2048MB GDDR5 (128 bit)
Memory Clockspeed : 5.0 Gbps
Bus : PCI-Express 3.0
Video-Features : HDMI 1.4a
Cooling : 2-Slot Cooling
Connectivity : DL-DVI-D, HDMI, VGA (D-Sub)
Product Size : 165mm(L) x 111mm(W)
Power Connector : no "external power connector
Graphics card require:

PCI Express-compliant motherboard with one dual-width x16 graphics slot
Minimum 400W or greater system power supply (with a minimum 12V current rating of 20A)
Microsoft Windows 8, Windows 7, Vista, XP
Key Features

NVIDIA Maxwell architecture
NVIDIA GPU Boost 2.0
NVIDIA Adaptive Vertical Sync
NVIDIA® TXAA™ technology
NVIDIA FXAA™ technology
Microsoft DirectX 11.2 API
NVIDIA PhysX® technology
NVIDIA CUDA® technology
NVIDIA 3D Vision®-Ready
NVIDIA Project SHIELD™-Ready
NVIDIA Surround™
PCI Express 3.0 support
OpenGL 4.4 and OpenCL™ Support
Get the best gaming, with NVIDIA GeForce Experience™ one-click drivers and settings
NVIDIA GeForce Experience™

(Are they any better than Nvidia Geforce GTX 580, And which one Is the best one?)