Radeon HD 4770 vs Radeon R9 M375

Intro

Compare those specs to the Radeon R9 M375, which makes use of a 28 nm design. AMD has set the core speed at 1015 MHz. The DDR3 RAM runs at a speed of 1100 MHz on this card. It features 640 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 4770 should theoretically be much faster than the Radeon R9 M375 in general. (explain)

Radeon HD 4770		51200 MB/sec
Radeon R9 M375		35200 MB/sec
	Difference: 16000 (45%)

Texel Rate

The Radeon R9 M375 should be quite a bit (more or less 69%) better at AF than the Radeon HD 4770. (explain)

Radeon R9 M375		40600 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 16600 (69%)

Pixel Rate

The Radeon R9 M375 should be much (more or less 35%) faster with regards to FSAA than the Radeon HD 4770, and also capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 M375		16240 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 4240 (35%)

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

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core clock speed. 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 quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.