Submit Benchmarks!

Submit SSD Benchmark
Submit GPU Benchmark

Compare any two graphics cards:
VS

Radeon HD 3870 X2 512MB vs Radeon HD 4750

Intro

The Radeon HD 3870 X2 512MB has core speeds of 825 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 RAM. It features 320(64x5) SPUs along with 16 TAUs and 16 ROPs.

Compare all that to the Radeon HD 4750, which features clock speeds of 730 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 RAM. It features 640(128x5) SPUs as well as 32 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 3870 X2 512MB should theoretically perform a lot faster than the Radeon HD 4750 in general. (explain)

Radeon HD 3870 X2 512MB 115200 MB/sec
Radeon HD 4750 51200 MB/sec
Difference: 64000 (125%)

Texel Rate

The Radeon HD 3870 X2 512MB will be a small bit (approximately 13%) faster with regards to texture filtering than the Radeon HD 4750. (explain)

Radeon HD 3870 X2 512MB 26400 Mtexels/sec
Radeon HD 4750 23360 Mtexels/sec
Difference: 3040 (13%)

Pixel Rate

The Radeon HD 3870 X2 512MB will be much (about 126%) faster with regards to anti-aliasing than the Radeon HD 4750, and will be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon HD 3870 X2 512MB 26400 Mpixels/sec
Radeon HD 4750 11680 Mpixels/sec
Difference: 14720 (126%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Display Prices

Hide Prices

Radeon HD 3870 X2 512MB

Amazon.com

Check prices at:

Radeon HD 4750

Amazon.com

Check prices at:

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 3870 X2 512MB Radeon HD 4750
Manufacturer AMD AMD
Year Jan 28, 2008
Code Name R680 RV740
Memory 512 MB (x2) 512 MB
Core Speed 825 MHz (x2) 730 MHz
Memory Speed 1800 MHz (x2) 3200 MHz
Power (Max TDP) (Unknown) watts 75 watts
Bandwidth 115200 MB/sec 51200 MB/sec
Texel Rate 26400 Mtexels/sec 23360 Mtexels/sec
Pixel Rate 26400 Mpixels/sec 11680 Mpixels/sec
Unified Shaders 320(64x5) (x2) 640(128x5)
Texture Mapping Units 16 (x2) 32
Render Output Units 16 (x2) 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit (x2) 128-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 826 million
Bus PCIe 2.0 x16/(internal PCIe 1.1 x16) PCIe 2.0 x16
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of MB per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 3870 X2 512MB

Amazon.com

Check prices at:

Radeon HD 4750

Amazon.com

Check prices at:

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.

Comments

Be the first to leave a comment!

Your email address will not be published. Required fields are marked *


*

WordPress Anti Spam by WP-SpamShield