Sapphire HD7870 Overclock Edition Review

1. Introduction2. Sapphire HD7870 Overclock Edition3. Sapphire HD7870 Overclock Edition (Super High Res Gallery)4. Testing Methodology5. Synthetic: Unigine Heaven Benchmark6. Synthetic: 3DMark Vantage7. Synthetic: 3DMark 118. Synthetic: HQV Benchmark 2.09. Gaming: F1 201110. Gaming: HomeFront11. Gaming: Alien V Predator12. Gaming: Dead Island13. Gaming: Tom Clancy HAWX 214. Gaming: Resident Evil 515. Gaming: Far Cry 216. Gaming: Total War Shogun 217. Technical: Thermal Dynamics18. Technical: Acoustics Performance19. Technical: Power Consumption20. Technical: Overclocking21. Closing Thoughts22. View All Pages

Last week we reviewed the overclocked XFX HD7870 Black Edition graphics card, and today we look at the Sapphire HD7870 Overclock Edition. This card features a custom cooler, with twin fans and overclocked out of the box settings to appeal to the enthusiast audience.

Sapphire discrete video cards have scored well on Kitguru in recent months, and with good reason. Their coolers are the best on the market, even outperforming solutions from XFX. The combination of low noise levels and excellent cooling proficiency ensure class leading performance.

Product	AMD HD7970	AMD HD7950	Sapphire HD7870 Overclock Edition	AMD HD7850
Core Clock speed	925mhz	800mhz	1000mhz (1,050mhz)	860mhz
Transistors	4.31 billion	4.31 billion	2.8 billion	2.8 billion
Stream Processors	2,048	1,792	1,280	1,024
Compute Performance	3.79 TFLOPS	2.87 TFLOPS	2.56 TFLOPS	1.76 TFLOPS
Texture Units	128	112	80	64
Texture Fillrate	118.4 GT/s	89.6 GT/s	80 GT/s	55.0 GT/s
ROPs	32	32	32	32
Pixel Fillrate	29.6 GP/s	25.6 GP/s	32.0 GP/s	27.52 GP/s
Z/Stencil	128	128	128	128
Memory Type	3GB GDDR5	3GB GDDR5	2GB GDDR5	2GB GDDR5
Memory Clock	1,375mhz	1,250mhz	1,200mhz (1,250mhz)	1,200mhz
Memory Data Rate	5.5 GBps	5.0 Gbps	4.8 Gbps (5.0Gbps)	4.8 Gbps
Memory Bandwidth	264 GB/s	240 GB/s	153.6 GB/s	153.6 GB/s

Sapphire have opted for the same modest overclock as XFX – that being 50mhz on the core, from 1,200mhz to 1,250mhz. The GDDR5 memory also receives a 50mhz clock increase to 1,250mhz (5.0Gbps effective). The Gigabyte HD7870 Overclock Edition that we reviewed a short while ago received a 100mhz overclock to 1,100mhz on the core, but didn’t have a memory boost at all.

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