Compare any two graphics cards:

GeForce GTS 450 1GB vs Radeon HD 4770

Intro

The GeForce GTS 450 1GB makes use of a 40 nm design. nVidia has clocked the core frequency at 783 MHz. The GDDR5 memory is set to run at a frequency of 902 MHz on this particular card. It features 192 SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Compare those specifications to the Radeon HD 4770, which has GPU core speed of 750 MHz, and 512 MB of GDDR5 RAM running at 800 MHz through a 128-bit bus. It also is made up of 640(128x5) Stream Processors, 32 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4770		80 Watts
GeForce GTS 450 1GB		106 Watts
	Difference: 26 Watts (33%)

Memory Bandwidth

The GeForce GTS 450 1GB should in theory perform a bit faster than the Radeon HD 4770 overall. (explain)

GeForce GTS 450 1GB		57728 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 6528 (13%)

Texel Rate

The GeForce GTS 450 1GB will be a little bit (about 4%) faster with regards to AF than the Radeon HD 4770. (explain)

GeForce GTS 450 1GB		25056 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 1056 (4%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTS 450 1GB is the winner, though only just barely. (explain)

GeForce GTS 450 1GB		12528 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 528 (4%)

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

GeForce GTS 450 1GB

Amazon.com

Check prices at:

Radeon HD 4770

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	GeForce GTS 450 1GB	Radeon HD 4770
Manufacturer	nVidia	AMD
Year	September 2010	Apr 28, 2009
Code Name	GF106	RV740
Memory	1024 MB	512 MB
Core Speed	783 MHz	750 MHz
Memory Speed	3608 MHz	3200 MHz
Power (Max TDP)	106 watts	80 watts
Bandwidth	57728 MB/sec	51200 MB/sec
Texel Rate	25056 Mtexels/sec	24000 Mtexels/sec
Pixel Rate	12528 Mpixels/sec	12000 Mpixels/sec
Unified Shaders	192	640(128x5)
Texture Mapping Units	32	32
Render Output Units	16	16
Bus Type	GDDR5	GDDR5
Bus Width	128-bit	128-bit
Fab Process	40 nm	40 nm
Transistors	1170 million	826 million
Bus	PCIe x16	PCIe 2.0 x16
DirectX Version	DirectX 11	DirectX 10.1
OpenGL Version	OpenGL 4.1	OpenGL 3.0

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's 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 amount of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total 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 processed in a second.

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

Display Prices

Hide Prices