Radeon HD 8830M vs 7870

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AMD Radeon HD 8830M

AMD Radeon HD 7870

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Reasons to consider the
AMD Radeon HD 8830M

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GPUBoss is not aware of any important advantages of the 8830M vs the 7870 GHz Edition.

Reasons to consider the
AMD Radeon HD 7870

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Significantly higher clock speed

1,000 MHz

575 MHz

Around 75% higher clock speed

Significantly higher effective memory clock speed

4,800 MHz

2,000 MHz

Around 2.5x higher effective memory clock speed

Higher memory bandwidth

153.6 GB/s

32 GB/s

More than 4.8x higher memory bandwidth

Better floating-point performance

2,560 GFLOPS

800 GFLOPS

Around 3.2x better floating-point performance

Higher pixel rate

32 GPixel/s

10 GPixel/s

Around 3.2x higher pixel rate

Higher texture rate

80 GTexel/s

25 GTexel/s

Around 3.2x higher texture rate

More render output processors

Twice as many render output processors

More shading units

1,280

640

Twice as many shading units

More texture mapping units

Twice as many texture mapping units

More compute units

Twice as many compute units

Higher memory clock speed

1,200 MHz

1,000 MHz

20% higher memory clock speed

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

Radeon HD 8830M

32 GB/s

Radeon HD 7870

153.6 GB/s

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

Radeon HD 8830M

10 GPixel/s

Radeon HD 7870

32 GPixel/s

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

Radeon HD 8830M

25 GTexel/s

Radeon HD 7870

80 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 8830M

800 GFLOPS

Radeon HD 7870

2,560 GFLOPS

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

Radeon HD 8830M

640

Radeon HD 7870

1,280

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

Radeon HD 8830M

Radeon HD 7870

gpu	Radeon HD 8830M	7870
GPU brand	AMD	AMD
GPU name	Venus	Pitcairn XT
Market	Laptop	Desktop
Clock speed	575 MHz	1,000 MHz
Is dual GPU	No	No
Reference card	None	None
raw performance
Shading units	640	1,280
Texture mapping units	40	80
Render output processors	16	32
Compute units	10	20
Pixel rate	10 GPixel/s	32 GPixel/s
Texture rate	25 GTexel/s	80 GTexel/s
Floating-point performance	800 GFLOPS	2,560 GFLOPS

memory	Radeon HD 8830M	7870
Memory clock speed	1,000 MHz	1,200 MHz
Effective memory clock speed	2,000 MHz	4,800 MHz
Memory bus	128 bit	256 bit
Memory	2,048 MB	2,048 MB
Memory type	DDR3	GDDR5
Memory bandwidth	32 GB/s	153.6 GB/s