Join Us On Facebook

Compare any two graphics cards:
VS

Radeon HD 4850 512MB vs Radeon R7 250

Intro

The Radeon HD 4850 512MB has a clock speed of 625 MHz and a GDDR3 memory speed of 993 MHz. It also features a 256-bit bus, and makes use of a 55 nm design. It is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Compare those specs to the Radeon R7 250, which features a core clock frequency of 1000 MHz and a GDDR5 memory speed of 1150 MHz. It also features a 128-bit memory bus, and uses a 28 nm design. It features 384 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250 65 Watts
Radeon HD 4850 512MB 110 Watts
Difference: 45 Watts (69%)

Memory Bandwidth

Theoretically speaking, the Radeon R7 250 should be a bit faster than the Radeon HD 4850 512MB overall. (explain)

Radeon R7 250 73600 MB/sec
Radeon HD 4850 512MB 63552 MB/sec
Difference: 10048 (16%)

Texel Rate

The Radeon HD 4850 512MB should be a small bit (approximately 4%) better at anisotropic filtering than the Radeon R7 250. (explain)

Radeon HD 4850 512MB 25000 Mtexels/sec
Radeon R7 250 24000 Mtexels/sec
Difference: 1000 (4%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 4850 512MB is the winner, by far. (explain)

Radeon HD 4850 512MB 10000 Mpixels/sec
Radeon R7 250 8000 Mpixels/sec
Difference: 2000 (25%)

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

Radeon HD 4850 512MB

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 Radeon HD 4850 512MB Radeon R7 250
Manufacturer AMD AMD
Year Jun 25, 2008 October 2013
Code Name RV770 PRO Oland XT
Fab Process 55 nm 28 nm
Bus PCIe 2.0 x16 PCIe 3.0 x16
Memory 512 MB 1024 MB
Core Speed 625 MHz 1000 MHz
Shader Speed N/A MHz (N/A) MHz
Memory Speed 993 MHz (1986 MHz effective) 1150 MHz (4600 MHz effective)
Unified Shaders 800(160x5) 384
Texture Mapping Units 40 24
Render Output Units 16 8
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
DirectX Version DirectX 10.1 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3
Power (Max TDP) 110 watts 65 watts
Shader Model 4.1 5.0
Bandwidth 63552 MB/sec 73600 MB/sec
Texel Rate 25000 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 10000 Mpixels/sec 8000 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach 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