Gigabyte GA-5AX performance optimisation

Having my working K6 system since a couple of weeks now I began tweaking the BIOS settings for my Gigabyte GA-5AX rev 4.1 to find the best performance, as it took quite some testing I’m now sharing what I found 😉

First of all let’s remember the system:

  • AMD K6-2+ 550 MHz
  • 768 MB PC133 CL2  RAM
  • nVidia GeForce 3 Ti200 64MB
  • Fast SATA HDD
  • Windows XP SP3

I began by setting reasonably good BIOS settings and after each individual setting change I  ran a series of 5 benchmarks using the good old Quake 3 v1.32 with “timedemo 1, demo four”. Quake 3 has the advantage of giving very consistent and reproducible results over any other benchmark tool and after all I’m using this system for old games…

The first tests I made is not BIOS related though…I tried to find the best nVidia driver working with my card. The 23.01 gave me an average of 28 FPS and the 21.83 WHQL an average of 28.7 FPS so there is the first base…I’ll be using the ForceWare 21.83 WHQL for the rest of the tests.

Now I’ll go trough each BIOS setting and give the fps change from this baseline…note that the changes are “incremental” by always keeping the previous test’s best performance.

Primary Frame Buffer

  • 2 MB (BIOS default): 28.7 FPS
  • All: 28.2 FPS
  • Disabled: 28.8 FPS

VGA Frame Buffer

  • Enabled: 28.8 FPS
  • Disabled: 27.7 FPS

Data Merge

  • Enabled: 28.8 FPS
  • Disabled: 27.7 FPS

Tweaking “IO Recovery Period” or “AGP Texture Size” didn’t change anything. Then I changed the CPU from an AMD K6-2+ 550MHz to an AMD K6-3+ 550 MHz to see how the 128kB additional L2 cache influenced the result. Well the fps jumped from 28.8 to 31.1 FPS which is nice!

As you can see I wasn’t that wrong with my default configuration as I only managed to “lower” the result by tweaking some settings…that’s experience talking 😉 Here are the pictures of my final best result settings…

GA-5AX BIOS – Base Menu

GA-5AX BIOS – Power Management Setup

GA-5AX BIOS – PNP/PCI Configuration

GA-5AX BIOS – Integrated Peripherals

GA-5AX BIOS – BIOS Features Setup

GA-5AX BIOS – Chipset Features Setup

2 thoughts on “Gigabyte GA-5AX performance optimisation

  1. Hello friend, I’ve been going through your webpage and it is a great, fun read! I’ve built a similar system with a K6-3+ 400 running at 550MHz and a Voodoo 3 but I’m having crippled performance, no matter what I’ve tried. If you’d care to take a look on this thread here where I detail my adventures 😛
    It’s right around the end of the first page that the problems start (initially with a K6-2 400).
    http://vogons.zetafleet.com/viewtopic.php?t=33950

    • Hi! I have read your post and have no real other advice to give unfortunately 🙁 The only thing I can say is that I have similar problems on my system with Windows XP and current updates…I will try Windows XP SP1 with DirectX 8.1 (which corresponds to the period where my GeForce 2/3 is from) to see if there is any difference. I’ll post the result in 2-3 weeks…

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