XFX HD7850 Black Edition Review

1. Introduction2. XFX HD7850 Black Edition3. XFX HD7850 Black Edition (Super High Res Gallery)4. Testing Methodology5. Synthetic: Unigine Heaven Benchmark6. Synthetic: 3D Mark 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: Acoustics Performance18. Technical: Thermal Dynamics19. Technical: Power Consumption20. Technical: Overclocking21. Closing Thoughts22. View All Pages

Last week we reviewed the excellent Sapphire HD7850 Overclock Edition and XFX have sent us their competing part – the XFX HD7850 Black Edition. This card features a even higher overclock, to 975mhz on the core with a custom two fan metal cooling solution. The big question, is this better than the Sapphire solution?

XFX and Sapphire have been head to head in battle for the last year, targeting various sectors with custom, overclocked graphics cards. The XFX HD7850 Black Edition looks a little more exciting than the HD7870 Black Edition we reviewed last week thanks to more daring core overclock speeds.

XFX are keen to highlight their ‘Ghost Thermal technology'.

What is this? Well XFX say “Through rigorous testing and analysis we have discovered the optimal thermal design that allows air to pass through the heatsink directly to the PCB and core components. Older enclosed designs often trapped the heat, creating a bottle neck at the exhaust, this can be remedied but at the cost of a higher fan speed which creates excess noise. Our design allows us to keep the fan speeds lower while allowing the heat to dissipate evenly throughout the card.”

Product	AMD HD7970	AMD HD7950	AMD HD7870	XFX HD7850 BE
Core Clock speed	925mhz	800mhz	1000mhz	860mhz (975mhz)
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	1,200mhz (1,250mhz)
Memory Data Rate	5.5 GBps	5.0 Gbps	4.8 Gbps	4.8 Gbps (5.0Gbps)
Memory Bandwidth	264 GB/s	240 GB/s	153.6 GB/s	153.6 GB/s

XFX have opted for a generous 115mhz overclock on the core, raising the speed from 860mhz to 975mhz, this should have a dramatic impact on the overall performance. The 2GB of GDDR5 memory has been overclocked by 50mhz from 1,200mhz to 1,250mhz (from 4.8Gbps to 5.0Gbps effective).

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