Sapphire Technology is widely known for making new graphics cards based on GPUs released half a year ago or even before that. As for today, we'll cover another three products based on Radeon HD 7870/7770/7750 and one with a new core—Sapphire HD 7970 GHz Edition.

Sapphire Vapor-X HD 7970 GHz Edition

GPU: Radeon HD 7970 GHz Edition (Tahiti) Interface: PCIe 3.0 x16 GPU clock rate (ROPs/shaders): 1050–1000 MHz (the standard is 1000–1050 MHz) Memory clock rate, physical (effective): 1500 (6000) MHz (standard) Memory bus: 384-bit Stream processors: 2048 Texture units: 128 (BLF/TLF/ANIS) ROP units: 32 Dimensions: 275x115 mm, 3 slots PCB color: dark blue Peak power consumption (3D/2D/standby): 225/75/3 W Output connectors: Dual-Link DVI-I, Single-Link DVI-D, HDMI, DisplayPort Multi-GPU mode: Crossfire X (hardware)

Sapphire HD 7870 GHz Flex Edition

GPU: Radeon HD 7870 GHz Edition (Pitcairn XT) Interface: PCIe 3.0 x16 GPU clock rate (ROPs/shaders): 1000 MHz (standard) Memory clock rate, physical (effective): 1200 (4800) MHz (standard) Memory bus: 256-bit Stream processors: 1280 Texture units: 80 (BLF/TLF/ANIS) ROP units: 32 Dimensions: 260x113 mm, 2 slots PCB color: dark blue Peak power consumption (3D/2D/standby): 170/52/3 W Output connectors: Dual-Link DVI-I, Single-Link DVI-D, HDMI, DisplayPort Multi-GPU mode: Crossfire X (hardware)

Sapphire Vapor-X HD 7770 GHz Edition OC

GPU: Radeon HD 7770 GHz Edition (Cape Verde XT) Interface: PCIe 3.0 x16 GPU clock rate (ROPs/shaders): 1100 MHz (the standard is 1000–1100 MHz) Memory clock rate, physical (effective): 1300 (5200) MHz (the standard is 1125 (4500) MHz) Memory bus: 128-bit Stream processors: 640 Texture units: 40 (BLF/TLF/ANIS) ROP units: 16 Dimensions: 225x110 mm, 2 slots PCB color: dark blue Peak power consumption (3D/2D/standby): 87/42/3 W Output connectors: Dual-Link DVI-I, Dual-Link DVI-D, HDMI, DisplayPort Multi-GPU mode: Crossfire X (hardware)

Sapphire HD 7750 Low Profile

GPU: Radeon HD 7750 (Cape Verde Pro) Interface: PCIe 3.0 x16 GPU clock rate (ROPs/shaders): 800 MHz (the standard is 800–900 MHz) Memory clock rate, physical (effective): 1125 (4500) MHz (standard) Memory bus: 128-bit Stream processors: 512 Texture units: 32 (BLF/TLF/ANIS) ROP units: 16 Dimensions: 170x67 mm, 1 slot PCB color: dark blue Peak power consumption (3D/2D/standby): 53/22/3 W Output connectors: Dual-Link DVI-I, miniHDMI, miniDP Multi-GPU mode: Crossfire X (software)

Comparison with the reference design, front view

Sapphire Vapor-X HD 7970 GHz Edition	Reference AMD Radeon HD 7970

Sapphire HD 7870 GHz Flex Edition	Reference AMD Radeon HD 7870

Sapphire Vapor-X HD 7770 GHz Edition OC	Reference AMD Radeon HD 7770

Sapphire HD 7750 Low Profile	Reference AMD Radeon HD 7750

Comparison with the reference design, rear view

Sapphire Vapor-X HD 7970 GHz Edition	Reference AMD Radeon HD 7970

Sapphire HD 7870 GHz Flex Edition	Reference AMD Radeon HD 7870

Sapphire Vapor-X HD 7770 GHz Edition OC	Reference AMD Radeon HD 7770

Sapphire HD 7750 Low Profile	Reference AMD Radeon HD 7750

The top graphics adapter in our review has an 8-phase GPU VRM managed by the Chil controller, and a 2-phase memory VRM. The memory chips are placed around the GPU, as in the reference card. Also, Sapphire added a second DVI output. Overall, Sapphire Vapor-X HD 7970 GHz Edition's set of outputs allows to connect three displays simultaneously. The graphics card demands supplementary power through 6-pin and 8-pin connectors.

The Sapphire HD 7870 GHz Flex Edition has a shifted 6-phase GPU instead of the reference 5-phase. Again, Sapphire added a DVI output and a full-size DisplayPort instead of two mini versions of the reference device. Being a Flex Edition graphics adapter, Sapphire HD 7870 GHz Flex Edition can handle four, not three displays at the same time. The supplementary power is provided through a pair of 6-pin connectors.

Sapphire Vapor-X HD 7770 GHz Edition OC has the same 3-phase GPU and 1-phase memory VRMs as the reference card. However, the set of outputs doesn't differ from those of the cards above. The graphics card has a 6-pin connector for supplementary power.

Sapphire HD 7750 Low Profile is a completely different product, optimized for slim and barebone cases. Compared to the reference card, it has the same core, memory and VRMs (2-phase for GPU and 1-phase for memory). Due to its size, the adapter has mini, not full-sized HDMI and DisplayPort outputs. The graphics adapter requires no supplementary power.

Maximum resolutions and frequencies:

• 240 Hz maximum refresh rate
• 2048 x 1536 @ 85 Hz max. analog (VGA) resolution
• 2560 x 1600 @ 60 Hz max. digital (DVI) resolution (for Dual Link DVI-D)

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