AGP Performance Explained

Before testing the AGP card I had a few predictions in mind, mostly dealing with the performance I could expect from an AGP enabled system. I can tell you this now, you shouldn't expect any huge performance boosts, especially in tests like Winstone which depend on the graphics adapter to provide a certain level of performance and no more in order to receive the absolute best scores. The areas where I expected AGP to truly shine were mainly 3D Rendering and Games, and surprisingly enough, I was right =) There are some interesting quirks that I happened to run across while testing the ATI card for the first time and I will mention them in its full review on the Video Accelerator Comparison Guide.

Now lets get to those benchmarks, for the test system I used an Intel Pentium II MMX 266 at 300MHz on the Chaintech 6LTM with 64MB of SDRAM and a Quantum Atlas II UW SCSI 3 HDD. I took the Matrox Millennium II, the fastest PCI video card I have tested, and pitted it against the ATI 3D Rage Pro, in order to level the playing field both cards tested were 4MB cards and the exact same system was used in both tests. The latest drivers from each manufacturer was used in order to insure the best possible results, the test suite included Winbench 97, 3D Winbench 97, Chris Dial's 3D Bench and more...

Windows 95 Performance Comparison - PCI vs AGP - Business Winstone 97

What do we see here? A very small margin of a performance increase provided by the AGP card vs the PCI video card in real world business tasks, not a big plus to go out and buy an AGP card right?

Windows 95 Performance Comparison - PCI vs AGP - High End Winstone 97

This is a bit of a surprise, the outstanding Matrox Millennium II succeeds in beating the "superior" AGP card in the High End Winstone tests, looks like another win for PCI over AGP in this case...but the next few results should be a pleasant site to most AGP advocates.

DOS Gaming Performance Comparison - PCI vs AGP - Chris Dial's SVGA Bench

Here AGP begins to strut its stuff by beating the powerful PCI Millennium II in Chris Dial's SVGA Benchmark utility. Although the ATI 3D Rage Pro only received about 9fps more than the Millennium II we can predict by these results what a more tweaked and better designed AGP card can produce. In a few months we might even be able to dethrone the Voodoofx chipset as the supreme gaming platform for the Desktop PC, we'll just have to wait and see.

DOS Gaming Performance Comparison - PCI vs AGP - Chris Dial's VGA Bench

Yet another disappointment for the ATI "AGP Powerhouse" card, its VGA performance is outstanding compared to most PCI cards but still not enough to compete with the might of the PCI Millennium II. I should mention here that AGP was in no way intended for use exclusively with VGA games and programs requiring VGA acceleration, that is like giving a Porsche to a driver that will never take it above 20 mph. When you look at the 3D Winbench 97 Scores below you'll begin to see exactly why the ATI 3D Rage Pro is a better solution for AGP equipped systems than the all-mighty Matrox Millennium II.

2D Windows Performance Comparison - PCI vs AGP - Winbench97

Here are some interesting figures. At lower color depths the Matrox Millennium II (PCI) consistently beats the ATI 3D Rage Pro (AGP), however once you up the color depth past 256 colors to 65K or 16.7M the AGP card takes over. It is a very interesting occurrence, I never expected AGP to have this great of an effect on normal everyday programs requiring 2D Windows acceleration. Considering the ATI 3D Rage Pro is no where near the fastest AGP card out, I am wondering what the faster RIVA 128 based AGP cards will show us. I will try to have more benchmarks up later today, even some startling comparisons at 640 x 480!