GeForce GTS 250 1GB vs GeForce GTX 275

Intro

Compare those specs to the GeForce GTX 275, which uses a 55 nm design. nVidia has clocked the core frequency at 633 MHz. The GDDR3 RAM is set to run at a speed of 1134 MHz on this specific card. It features 240 SPUs as well as 80 TAUs and 28 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 250 1GB		145 Watts
GeForce GTX 275		219 Watts
	Difference: 74 Watts (51%)

Memory Bandwidth

The GeForce GTX 275 should in theory perform quite a bit faster than the GeForce GTS 250 1GB in general. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GTS 250 1GB		70400 MB/sec
	Difference: 56608 (80%)

Texel Rate

The GeForce GTX 275 will be just a bit (approximately 7%) better at AF than the GeForce GTS 250 1GB. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GTS 250 1GB		47232 Mtexels/sec
	Difference: 3408 (7%)

Pixel Rate

The GeForce GTX 275 will be much (approximately 50%) better at AA than the GeForce GTS 250 1GB, and capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 275		17724 Mpixels/sec
GeForce GTS 250 1GB		11808 Mpixels/sec
	Difference: 5916 (50%)

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: Bandwidth is the largest amount of information (counted in MB per second) that can be transported over the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the clock 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 output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.