My current card is a 1Gb GT 720.
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Operating System: Windows 7 Home Premium, 64-bit (Service Pack 1)
DirectX version: 11.0
GPU processor: GeForce GT 720
Driver version: 332.35
Direct3D API version: 11
Direct3D feature level: 11_0
CUDA Cores: 384
Core clock: 967 MHz
Memory data rate: 2002 MHz
Memory interface: 64-bit
Memory bandwidth: 16.02 GB/s
Total available graphics memory: 4096 MB
Dedicated video memory: 1024 MB DDR3
System video memory: 0 MB
Shared system memory: 3072 MB
Video BIOS version: 80.28.56.00.01
IRQ: 16
Bus: PCI Express x8 Gen3
Device Id: 10DE 1286 108710DE
Part Number: 2130 0004
1. Is it better to get GDDR5 of equal memory or a DDR3 with more memory?
2. The specs above are saying that the card's interface is a PCI Express 2.0, x16 lanes right?
3. Any recommendations? It is a little difficult to find cards with the older PCI interfaces. I would prefer a card that is a step up from general graphics cards but not a full on monstrosity that would require a power supply upgrade. I had been looking at several GT 730s but from what I've found they seem like they wouldn't be much of an upgrade.