Join Us On Facebook

Compare any two graphics cards:
VS

Radeon HD 7770 vs Radeon R7 250

Intro

The Radeon HD 7770 features core speeds of 1000 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 memory. It features 640 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Compare those specs to the Radeon R7 250, which features GPU core speed of 1000 MHz, and 1024 MB of GDDR5 memory running at 1150 MHz through a 128-bit bus. It also features 384 Stream Processors, 24 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250 65 Watts
Radeon HD 7770 80 Watts
Difference: 15 Watts (23%)

Memory Bandwidth

Theoretically speaking, the Radeon R7 250 will be 2% quicker than the Radeon HD 7770 overall, because of its higher data rate. (explain)

Radeon R7 250 73600 MB/sec
Radeon HD 7770 72000 MB/sec
Difference: 1600 (2%)

Texel Rate

The Radeon HD 7770 should be quite a bit (approximately 67%) faster with regards to AF than the Radeon R7 250. (explain)

Radeon HD 7770 40000 Mtexels/sec
Radeon R7 250 24000 Mtexels/sec
Difference: 16000 (67%)

Pixel Rate

The Radeon HD 7770 should be a lot (approximately 100%) faster with regards to FSAA than the Radeon R7 250, and also will be able to handle higher screen resolutions better. (explain)

Radeon HD 7770 16000 Mpixels/sec
Radeon R7 250 8000 Mpixels/sec
Difference: 8000 (100%)

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

Display Prices

Hide Prices

Radeon HD 7770

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

Display Specifications

Hide Specifications

Model Radeon HD 7770 Radeon R7 250
Manufacturer AMD AMD
Year February 2012 October 2013
Code Name Cape Verde XT Oland XT
Fab Process 28 nm 28 nm
Bus PCIe 3.0 x16 PCIe 3.0 x16
Memory 1024 MB 1024 MB
Core Speed 1000 MHz 1000 MHz
Shader Speed N/A MHz (N/A) MHz
Memory Speed 1125 MHz (4500 MHz effective) 1150 MHz (4600 MHz effective)
Unified Shaders 640 384
Texture Mapping Units 40 24
Render Output Units 16 8
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
DirectX Version DirectX 11.1 DirectX 11.2
OpenGL Version OpenGL 4.2 OpenGL 4.3
Power (Max TDP) 80 watts 65 watts
Shader Model 5.0 5.0
Bandwidth 72000 MB/sec 73600 MB/sec
Texel Rate 40000 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 16000 Mpixels/sec 8000 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Comments

Be the first to leave a comment!

Your email address will not be published.


You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>

WP-SpamFree by Pole Position Marketing