Today we shall review a couple of graphics cards based on the Barts GPU: PowerColor HD6850 1GB GDDR5 and PowerColor PCS+ HD6870 1GB GDDR5. Both are custom products and one is factory-overclocked, too. These mid-end solutions compete with NVIDIA's GeForce GTX 460 and GeForce GTS 450.

Design

PowerColor HD6850 1GB GDDR5
Official product page GPU: Radeon HD 6850 (Barts) Interface: PCIe x16 2.1 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/ANIS) ROPs: 32 Size: 216 x 111 x 38 mm or 223 x 111 x 38 mm PCB color: red RAMDACs/TDMS: integrated into GPU Outputs: Dual-Link DVI-I, Single-Link DVI-D, DisplayPort, HDMI Multi-GPU mode: hardware CrossFireX
PowerColor PCS+ HD6870 1GB GDDR5
Official product page GPU: Radeon HD 6870 (Barts) Interface: PCIe x16 2.1 GPU clock rate (ROPs/shaders): 940/940 MHz (the standard is 900/900 MHz) Memory clock rate, physical (effective): 1100 (4400) MHz (the standard is 1050 (4200) MHz) Bus: 256-bit Stream processors: 1120 TMUs: 48 (BLF/TLF/ANIS) ROPs: 32 Size: 241x111x38 mm PCB color: red RAMDACs/TDMS: integrated into GPU Outputs: Dual-Link DVI-I, Single-Link DVI-D, 2 x mini DisplayPort, HDMI Multi-GPU mode: hardware CrossFireX

Comparison with the reference design, front view
PowerColor HD6850 1GB GDDR5	Reference AMD Radeon HD 6850
PowerColor PCS+ HD6870 1GB GDDR5	Reference AMD Radeon HD 6870

Comparison with the reference design, rear view
PowerColor HD6850 1GB GDDR5	Reference AMD Radeon HD 6850
PowerColor PCS+ HD6870 1GB GDDR5	Reference AMD Radeon HD 6870

As you can see the company has customized both graphics cards much.

PowerColor PCS+ HD6870 1GB GDDR5 has two 6-pin supplementary power connectors, PowerColor HD6850 1GB GDDR5 has one.

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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