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Differences What are the advantages of each

Front view of Radeon R7 265

Reasons to consider the
AMD Radeon R7 265

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Higher effective memory clock speed 5,600 MHz vs 4,200 MHz Around 35% higher effective memory clock speed
Higher clock speed 900 MHz vs 800 MHz Around 15% higher clock speed
Significantly higher memory clock speed 1,400 MHz vs 1,050 MHz Around 35% higher memory clock speed
Significantly lower TDP 150W vs 254W More than 40% lower TDP
Front view of Radeon HD 6850 X2

Reasons to consider the
Generic Radeon HD 6850 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
Significantly higher memory bandwidth 268.8 GB/s vs 179.2 GB/s More than 50% higher memory bandwidth
More memory 4,096 MB vs 2,048 MB 2x more memory
Better floating-point performance 3,072 GFLOPS vs 1,894.4 GFLOPS More than 60% better floating-point performance
Significantly more render output processors 64 vs 32 Twice as many render output processors
Higher pixel rate 51.2 GPixel/s vs 29.6 GPixel/s Around 75% higher pixel rate
Significantly more shading units 1,920 vs 1,024 896 more shading units
Much wider memory bus 512 bit vs 256 bit 2x wider memory bus
More texture mapping units 96 vs 64 32 more texture mapping units
Higher texture rate 76.8 GTexel/s vs 59.2 GTexel/s Around 30% higher texture rate
More compute units 24 vs 16 8 more compute units

Features Key features of the Radeon R7 265  vs HD 6850 X2 

memory bandwidth Rate at which data can be read from or stored in onboard memory

Radeon R7 265
179.2 GB/s
Radeon HD 6850 X2
268.8 GB/s

pixel rate Number of pixels a graphics card can render to the screen every second

Radeon R7 265
29.6 GPixel/s
Radeon HD 6850 X2
51.2 GPixel/s

texture rate Speed at which a graphics card can perform texture mapping

Radeon R7 265
59.2 GTexel/s
Radeon HD 6850 X2
76.8 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon R7 265
1,894.4 GFLOPS
Radeon HD 6850 X2
3,072 GFLOPS

shading units Subcomponents of the gpu, these run in parallel to enable fast pixel shading

texture mapping units Built into each gpu, these resize and rotate bitmaps for texturing scenes

Specifications Full list of technical specs


Radeon R7 265  vs
HD 6850 X2 
GPU name Pitcairn Barts PRO
Market Desktop Desktop
Clock speed 900 MHz 800 MHz
Is dual GPU No Yes
Reference card None AMD Radeon HD 6850 X2 800 MHz 4 GB

raw performance

Shading units 1,024 1,920
Texture mapping units 64 96
Render output processors 32 64
Compute units 16 24
Pixel rate 29.6 GPixel/s 51.2 GPixel/s
Texture rate 59.2 GTexel/s 76.8 GTexel/s
Floating-point performance 1,894.4 GFLOPS 3,072 GFLOPS


Radeon R7 265  vs
HD 6850 X2 
Memory clock speed 1,400 MHz 1,050 MHz
Effective memory clock speed 5,600 MHz 4,200 MHz
Memory bus 256 bit 512 bit
Memory 2,048 MB 4,096 MB
Memory type GDDR5 GDDR5
Memory bandwidth 179.2 GB/s 268.8 GB/s

noise and power

TDP 150W 254W


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