PowerMagic ATI Radeon 7500 in the test: The old middle class re-drilled
Since the chip is manufactured using 0.15 µm technology and is additionally cooled, We expected very good overclocking options here. But we were more concerned about the RAM. 250MHz (500) shouldn't be a problem in view of the 4ns access time, but much more will probably not be possible. In the end we reached a maximum of 350MHz for the chip and at least 260MHz for the memory. This results in an increase of almost 30% for the chip and at least 13 percent for the memory.
We took a closer look at the effects this has on the results using two examples:
Quake 3 Arena
First, Quake 3 Arena was tested with the higher clock rates:
The Radeon 7500 can convert the higher clock rate into up to 21 percent more power, comes but at least in the normal quality settings not bypassing the GeForce2 Pro and Ti.
Since the distance between the opponents in the Max-Quality- Settings wasn't that big, the overclocked Radeon 7500 can now overtake the Pro and Ti. Here, too, the overclocked Radeon 7500 manages up to 21 percent more frames than with its standard clock.
After Quake 3 Arena demonstrated the increase in performance under OpenGL, this is now the VillageMark for Direct3D do:
In 16Bit, the overclocked Radeon 7500 can now bypass the GeForce2 cards, which were previously tied, and record a performance increase of up to 26 percent. Even under 32-bit, the higher clock rate is implemented very well with up to 21 percent performance gain.
Overclocking is definitely worthwhile with the Radeon 7500, as the chip in particular offers a lot more. The memory would have to be given additional cooling in order to tease out even more.
On the next page: Image quality