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Differences What are the advantages of each

Front view of Radeon R7 250X

Reasons to consider the
AMD Radeon R7 250X

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Slightly higher memory bandwidth 104 GB/s vs 73.6 GB/s More than 40% higher memory bandwidth
Higher turbo clock speed 1,100 MHz vs 1,050 MHz Around 5% higher turbo clock speed
Front view of Radeon R7 250

Reasons to consider the
Generic Radeon R7 250

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GPUBoss is not aware of any important advantages of the Radeon R7 250 vs the AMD Radeon R7 250X.

Features Key features of the Radeon R7 250X  vs 250 

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

Radeon R7 250X
104 GB/s
Radeon R7 250
73.6 GB/s
Great push forward compared to its predecessor , but memory bandwidth limited.
Radeon R7 250X | by Joel-Hruska (Feb, 2014)

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

Radeon R7 250X
8.4 GPixel/s
Radeon R7 250
8 GPixel/s
On the high end cards, this is easier to perform, because a redesign of the power delivery, a better cooler, or a pre-overclocked GPU are often the tactics used.
Radeon R7 250X | by Ian-Cutress (Feb, 2014)

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

Radeon R7 250X
25.2 GTexel/s
Radeon R7 250
24 GTexel/s
The Radeon R7 250X would be the latest addition to this entry-level lineup packing the Cape Verde (Oland) core with 640 Stream processors, 40 TMUs and 16 ROPs.
Radeon R7 250X | by hassan-mujtaba (Feb, 2014)

floating point performance How fast the gpu can crunch numbers

Radeon R7 250X
806.4 GFLOPS
Radeon R7 250
768 GFLOPS
If you’d like to run these calculations yourself, please note that we zeroed-out the average by subtracting one (100%) from the charted values.
Radeon R7 250X | by Thomas-Soderstrom (Jan, 2013)

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

It is still not clear if the 512 Stream Processors is a simple typo from Powercolor, or this one is actually based on Cape Verde Pro GPU, which was behind the HD 7750 graphics card.
Radeon R7 250X | by Slobodan-Simic (Feb, 2014)

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

According to a report, the new R7 250X graphics card is based on the 28nm Oland GPU and should pack 640 Stream Processors, 40 TMUs and 16 ROPs.
Radeon R7 250X | by Slobodan-Simic (Feb, 2014)

Specifications Full list of technical specs

gpu

Radeon R7 250X  vs
250 
GPU brand AMD AMD
GPU name Oland Oland
Clock speed 1,000 MHz 1,000 MHz
Turbo clock speed 1,100 MHz 1,050 MHz
Is dual GPU No No
Reference card None AMD Radeon R7 250 1 GHz 1 GB

raw performance

Shading units 640 384
Texture mapping units 24 24
Render output processors 16 16
Compute units 6 6
Pixel rate 8.4 GPixel/s 8 GPixel/s
Texture rate 25.2 GTexel/s 24 GTexel/s
Floating-point performance 806.4 GFLOPS 768 GFLOPS

memory

Radeon R7 250X  vs
250 
Memory clock speed 1,150 MHz 1,150 MHz
Effective memory clock speed 4,500 MHz 4,600 MHz
Memory bus 128 bit 128 bit
Memory 1,024 MB 1,024 MB
Memory type GDDR5 GDDR5
Memory bandwidth 104 GB/s 73.6 GB/s

noise and power

TDP 65W 65W

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