GeForce GTS 450 1GB vs Radeon HD 4770

Intro

The GeForce GTS 450 1GB makes use of a 40 nm design. nVidia has set the core frequency at 783 MHz. The GDDR5 RAM is set to run at a frequency of 902 MHz on this particular model. It features 192 SPUs along with 32 TAUs and 16 ROPs.

Compare all that to the Radeon HD 4770, which makes use of a 40 nm design. AMD has set the core speed at 750 MHz. The GDDR5 memory runs at a frequency of 800 MHz on this specific card. It features 640(128x5) SPUs along with 32 TAUs and 16 ROPs.

Price Comparison

GeForce GTS 450 1GB Amazon.com

Radeon HD 4770 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	GeForce GTS 450 1GB	Radeon HD 4770
Manufacturer	nVidia	AMD
Year	September 2010	Apr 28, 2009
Code Name	GF106	RV740
Fab Process	40 nm	40 nm
Bus	PCIe x16	PCIe 2.0 x16
Memory	1024 MB	512 MB
Core Speed	783 MHz	750 MHz
Shader Speed	1566 MHz	(N/A) MHz
Memory Speed	902 MHz (3608 MHz effective)	800 MHz (3200 MHz effective)
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
DirectX Version	DirectX 11	DirectX 10.1
OpenGL Version	OpenGL 4.1	OpenGL 3.0
Power (Max TDP)	106 watts	80 watts
Shader Model	5.0	4.1
Bandwidth	57728 MB/sec	51200 MB/sec
Texel Rate	25056 Mtexels/sec	24000 Mtexels/sec
Pixel Rate	12528 Mpixels/sec	12000 Mpixels/sec

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.