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GeForce GTX 650 vs Radeon R7 250

Intro

The GeForce GTX 650 makes use of a 28 nm design. nVidia has clocked the core frequency at 1058 MHz. The GDDR5 memory works at a frequency of 1250 MHz on this particular card. It features 384 SPUs along with 32 TAUs and 16 ROPs.

Compare those specs to the Radeon R7 250, which has a core clock speed of 1000 MHz and a GDDR5 memory frequency of 1150 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It is made up of 384 SPUs, 24 TAUs, and 8 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
Radeon R7 250 65 Watts
Difference: 1 Watts (2%)

Memory Bandwidth

In theory, the GeForce GTX 650 will be 9% quicker than the Radeon R7 250 overall, because of its higher bandwidth. (explain)

GeForce GTX 650 80000 MB/sec
Radeon R7 250 73600 MB/sec
Difference: 6400 (9%)

Texel Rate

The GeForce GTX 650 is much (about 41%) better at texture filtering than the Radeon R7 250. (explain)

GeForce GTX 650 33856 Mtexels/sec
Radeon R7 250 24000 Mtexels/sec
Difference: 9856 (41%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 650 is a better choice, by a large margin. (explain)

GeForce GTX 650 16928 Mpixels/sec
Radeon R7 250 8000 Mpixels/sec
Difference: 8928 (112%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

GeForce GTX 650

Amazon.com

Radeon R7 250

Amazon.com

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

Model GeForce GTX 650 Radeon R7 250
Manufacturer nVidia AMD
Year September 2012 October 2013
Code Name GK107 Oland XT
Fab Process 28 nm 28 nm
Bus PCIe 3.0 x16 PCIe 3.0 x16
Memory 2048 MB 1024 MB
Core Speed 1058 MHz 1000 MHz
Shader Speed 1058 MHz (N/A) MHz
Memory Speed 1250 MHz (5000 MHz effective) 1150 MHz (4600 MHz effective)
Unified Shaders 384 384
Texture Mapping Units 32 24
Render Output Units 16 8
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
DirectX Version DirectX 11.0 DirectX 11.2
OpenGL Version OpenGL 4.3 OpenGL 4.3
Power (Max TDP) 64 watts 65 watts
Shader Model 5.0 5.0
Bandwidth 80000 MB/sec 73600 MB/sec
Texel Rate 33856 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 16928 Mpixels/sec 8000 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Comments

One Response to “GeForce GTX 650 vs Radeon R7 250”
gamer says:
GTX 650 = R7 250 (fps)

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