On the example of NVIDIA GeForce GTX 275 896MB DDR3 (633/1400/2260 MHz).

Features:

• GPU: GeForce GTX 275 (GT200)
• 896 MB GDDR3 SDRAM in 14 Hynix chips on the front side; 1250 (2500) MHz peak clock rate
• Interface: PCI-Express x16
• GPU (ROPs/Shaders) clock rate: 633/1400 MHz (nominal)
• Memory clock rate, physical (effective): 1130 (2260) MHz (nominal)
• Bus width: 448-bit
• Vertex processors: -
• Pixel processors: -
• Unified processors: 240
• Texture processors: 80 (BLF/TLF)
• ROPs: 32
• Size: 270x100x33 mm (the latter is max. width)
• PCB color: black
• RAMDACs/TDMS: on the separate NVIO chip
• Outputs: 2 x DVI (Dual-Link/HDMI)
• VIVO: -
• Multi-GPU: Hardware SLI

This card can receive an audio stream from a sound card to transmit it via a DVI-to-HDMI adapter. If this feature is important for you, make sure the adapter is bundled.

This card requires two additional 6-pin power connections.

This card requires a DVI-to-D-Sub adapter to be connected to an analog monitor with a D-Sub interface.

Maximum resolutions and frequencies:

• 240 Hz maximum refresh rate
• 2048 x 1536 x 32bit @ 85Hz Max - analog interface
• 2560 x 1600 @ 60Hz Max - digital interface (all Dual-Link DVIs)

The HDTV review is available here.