Today we shall review three solutions from Gigabyte: a Radeon HD 6850, a GeForce GTS 450 and a GeForce GTX 460. All three are custom products equipped with custom coolers. Moreover, the two GeForce cards are factory-overclocked.

Design

Gigabyte GV-R685D5-1GD
GPU: Radeon HD 6850 (Barts) Interface: PCIe x16 GPU clock rate (ROPs/shaders): 775/775 MHz (standard) Memory clock rate, physical (effective): 1000 (4000) MHz (standard) Bus: 256-bit Stream processors: 960 TMUs: 48 (BLF/TLF) ROPs: 32 Size: 250x100x33 mm PCB color: blue RAMDACs/TDMS: integrated into GPU Outputs: Dual-Link DVI-D, Dual-Link DVI-I, DisplayPort, HDMI Multi-GPU mode: hardware CrossFire
Gigabyte GV-N450OC-1GI
GPU: GeForce GTS 450 (GF106) Interface: PCIe x16 GPU clock rate (ROPs/shaders): 830/1660 MHz (the standard is 783/1566 MHz) Memory clock rate, physical (effective): 900 (3600) MHz (standard) Bus: 128-bit Stream processors: 192 TMUs: 32 (BLF/TLF/ANIS) ROPs: 16 Size: 200x100x33 mm PCB color: blue RAMDACs/TDMS: integrated into GPU Outputs: 2 x Dual-Link DVI-I, HDMI mini Multi-GPU mode: hardware SLI
Gigabyte GV-N460OC-1GI
GPU: GeForce GTX 460 (GF104) Interface: PCIe x16 GPU clock rate (ROPs/shaders): 715/1430 MHz (the standard is 675/1350 MHz) Memory clock rate, physical (effective): 900 (3600) MHz (standard) Bus: 256-bit Stream processors: 338 TMUs: 56 (BLF/TLF/ANIS) ROPs: 24 Size: 200x100x33 mm PCB color: blue RAMDACs/TDMS: integrated into GPU Outputs: 2 x Dual-Link DVI-I, HDMI mini Multi-GPU mode: hardware SLI

Comparison with the reference design, front view
Gigabyte GV-R685D5-1GD	Reference AMD Radeon HD 6850
Gigabyte GV-N450OC-1GI	Reference NVIDIA GeForce GTS 450
Gigabyte GV-N460OC-1GI	Reference NVIDIA GeForce GTX 460

Comparison with the reference design, rear view
Gigabyte GV-R685D5-1GD	Reference AMD Radeon HD 6850
Gigabyte GV-N450OC-1GI	Reference NVIDIA GeForce GTS 450
Gigabyte GV-N460OC-1GI	Reference NVIDIA GeForce GTX 460

As you can see, the only reference part remaining in Gigabyte GV-R685D5-1GD is memory chip layout. Everything else was overhauled, power unit was relocated to one end of the PCB. Moreover, the new reference set of interfaces (with two Mini DisplayPort) was replaced by the more regular dual DVI, DisplayPort and HDMI. You can also see that the PCB has space for the second supplementary power connector — perhaps company's HD 6870 will be based on the same PCB.

Moving on to Gigabyte GV-N450OC-1GI. In this case only power unit was customized, and the card became longer than reference. This was probably done to provide better stability at higher clock rates.

Finally, Gigabyte GV-N460OC-1GI is nearly identical to reference and only features minor changes.

All cards have 6-pin supplementary power connectors, GV-N460OC-1GI has two.

Maximum resolutions and frequencies:

• 240 Hz maximum refresh rate
• 2560 x 1600 @ 60Hz max. digital resolution
• 2048 x 1536 @ 85Hz max. VGA resolution

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