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PowerMagic ATI Radeon 7500 in the test: The old middle class re-drilled

PowerMagic ATI Radeon 7500 in the test: The old middle class re-drilled

Technology

In our test we let the PowerMagic Radeon 7500 compete against a whole range of graphics cards from Nvidia. ATI itself ascribes a performance to the Radeon 7500 that is supposed to range between a GeForce2 Pro and Ultra, so actually exactly like a GeForce2 Ti. This supposedly strongest competitor of the Radeon 7500 could not be missing in our test. In order to enable a comparison with a graphics card from the high-end segment, we have also given the results of the GeForce3 Ti200 in all benchmarks. Now let's go into the technical features of our competitors in more detail:

Performance data GeForce2 Pro Radeon 7500 GeForce2 Ti GeForce3 Ti200 Manufacturing process 0.18 µm 0.15 µm 0.15 µm 0.15 µm Rendering pipelines 4 2 4 4 Texture units 2 3 2 2 Chip clock 200MHz 270 (290) MHz 250MHz 175MHz Memory clock 400MHz 460MHz 400MHz 400MHz memory interface DDR DDR DDR DDR memory bandwidth 6.4 GB/s 8.8 GB/s 6.4 GB/s 6.4 GB/s memory bus128Bit 128Bit 128Bit 128Bit memory access 5ns 4ns 5ns 4-5ns Pixel filling rate 800MPixel/s 580MPixel/s 1000MPixel/s 700MPixel/s Texel filling rate 1800 MTexel/s 1740 MTexel/s 2000 MTexel/s 1400 MTexel/s Polygons/sec 27 million 40 million ? 31 million 31 million

The clock rate of the Radeon 7500 chip is in something like the Radeon 8500: cards from ATI are delivered with a core clock of 290MHz, cards from third-party manufacturers only with 270MHz. Since the cards are identical, one wonders about the sense or nonsense of this handling. Otherwise it is noticeable that the Radeon 7500 only has two rendering pipelines, which can process three textures at the same time. In purely mathematical terms, this results in 1740 MTexel/s, but most games only use the function of calculating two textures at once, so that the Radeon is slowed down to 1160 MTexel/s in many games due to its two rendering pipelines. The memory bandwidth of 8.8 GB/s is achieved using the Hyper Z technology known from the old Radeon cards and revised in the Radeon 8500. Thanks to its two RAMDACs with 350MHz each, the card offers the option of displaying the image on two monitors or one monitor and a television set at the same time with different settings. This function is very similar to the TwinView technology from Nvidia or the Matrox G400-550 cards. ATI has set itself the task of producing a dual display graphics card with very good 3D performance, with which one would like to outdo the other dual display graphics cards from Matrox and Nvidia.

On the next page: Test System