L7VTA v1.x maximum CPU and HDD supported information as below,
HDD:400G
CPU: AMD Duron 200Mhz FSB CPU - 900 AMD Duron 266Mhz FSB CPU - 1800 
          AMD Morgan 200Mhz FSB CPU - 1.3G 
          AMD Athlon 200Mhz FSB CPU - 1.3G AMD Athlon 266Mhz FSB CPU - 1.4G
          AMD Athlon XP (0.18u) 266Mhz FSB CPU - 2100+ AMD Athlon XP (0.13u) 266Mhz FSB CPU - 2800+
          AMD Athlon XP (0.13u) 333Mhz FSB CPU - 3000+ 
          AMD Sempron 333Mhz FSB CPU - 2800+

Please update the BIOS to LA2c19b.bin which added the boot ROM of RAID to Enabled/Disabled to allow the system to boot up faster.

The L7VTA V1.1 is built in CMI 9739 Audio chip with additional Dolby Digital decoder which supports up to 6 channels.

Please update to the latest BIOS to fix it. Below is the website for you to download it.
http://www.ecs.com.tw/ECSWebSite/Product/Product_Detail.aspx?DetailID=327&CategoryID=1&MenuID=50&LanID=0

Since CMI9739A of L7VTA V1.1 is 6CH speaker out, 2 MIC are supported by the MB. The rear port is MIC1 while front port is MIC2. You can use MIC1/MIC2 together but you need to enable 2 MIC manually.

Our L7VTA BIOS has already disabled "AGP Fast Write" to get rid of the unstable issue. Though your AGP VGA card supports this function, if you open this item, it maybe result in system instability.

The latest BIOS for L7VTA is v1.7j attached below. 
The BIOS update steps are as follows.

1. Extract the utility to a disk and copy BIOS .bin file to this disk.
2. Boot from floppy with bootable disk.
3. Insert the disk(with utility and BIOS).
4. Execute the awd832b XXX.bin /sn/py/r
5. Load the default setting.
6. Save the BIOS then restart the system.

• get_app Download Link

Please adjust Clear CMOS jumper of the MB to "clear CMOS" location for over 3 seconds. Then put it back to "Normal" & power on to check if the CPU temperature becomes normal.