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Dual PIII-S Tualatin 1.4GHz, GA-6VXD7 Via 694x, 2GB PC133 CL2, Radeon HD4650. Source games in 1080p

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First post, by adalbert

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My first working dual Tualatin with Gigabyte GA-6VXD7 (VIA 694X) rev 1.0 mainboard 😀

Current specs:
GA-6VXD7 - needs a recap, but works and is stable
Two 1.4GHz SL5XL P3-S
2 GB Kingston PC133 CL2 SDRAM
64GB Sandisk SSD
Asus Radeon HD4650 1GB AGP
RTL8100 network card
XP Pro SP3
Fortron SFX 300W PSU (300-60GHS)
around 100 watts under load

I modified the CPUs: desoldered 3 pins (AN3, AJ3, AK4) and made AK4 - VTT bridge with 1k SMD resistor and Kynar wire.

Some issues (not big though):
CPU voltage is reported as ~1.26V. I measured it on the MOSFETs and it actually was 1.38V. Still that's lower than it should be (1.45V). Caps are bad, I will recap the mainboard later but I don't know if this is the cause of the problem. Looks like the mainboard is ignoring VID signals. Any ideas how to fix this? Is it possible that the mainboard bypassess VID signals and controls them in software, based on the CPU microcode?
Also, I can't get overclocking to work. This mobo has DIP switches and a single jumper to set FSB. I still get 133 FSB even after setting it to 142.

Attachments

Repair/electronic stuff videos: https://www.youtube.com/c/adalbertfix
ISA Wi-fi + USB in T3200SXC: https://www.youtube.com/watch?v=WX30t3lYezs
GUI programming for Windows 3.11 (the easy way): https://www.youtube.com/watch?v=d6L272OApVg

Reply 1 of 6, by adalbert

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I decided to try Steam, HL2 and CS: Source. January 2019 Steam version works fine on XP, modern versions would probably work with Win 7 installed. Some Source games have SSE2 check, i found it simple to remove by copying filesystem_stdio.dll from legitimate 2015 Garry's Mod copy.

CS: Source gameplay video: https://youtu.be/yp_s407Pdzk
HL2: Deathmatch gameplay video: https://youtu.be/01ffFQbX7A0
CS:S benchmark measured 56.04 FPS (the scene size is pretty small)

Source games are getting around 30FPS in full HD with reasonably sized maps. In more complex scenes it can dip below 20FPS, in very simple scenes (e.g. a closed room) it can hit 100FPS. HL2: Deathmatch has lower fps, but single player version is pretty OK.

Video settings: 1920x1080. Model, texture, shadow details: medium. Shader details: low. Water detail: simple reflections. Color correction: Enabled. Anti-aliasing: 2x MSAA. Filtering: Anisotropic 2x. VSync: Disabled. Motion blur: disabled. HDR: none. Multicore Rendering: Enabled.

//update:
HL2 gameplay https://youtu.be/MlbITJMZeJM

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  • cssbench1.jpg
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    cssbench1.jpg
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    1028 views
    File license
    Fair use/fair dealing exception

Repair/electronic stuff videos: https://www.youtube.com/c/adalbertfix
ISA Wi-fi + USB in T3200SXC: https://www.youtube.com/watch?v=WX30t3lYezs
GUI programming for Windows 3.11 (the easy way): https://www.youtube.com/watch?v=d6L272OApVg

Reply 3 of 6, by adalbert

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Thanks. BTW I resolved my FSB and voltage issues: FSB switching works fine, I just mistaked JP1 with JP2... 😀

to fix voltage, i had to bridge appropriate VID pins to ground. I followed the datasheet of mainboard's VRM https://pdf1.alldatasheet.com/datasheet-pdf/v … LD/RC5057M.html

It seems that by default all VIDs (except VID4?) are high, and we are getting 1.30V. I just bridged VID1 to ground which should raise it to 1.40V. On MOSFET it's actually 1.5V now, but I guess that there is some voltage drop on the way. Mainboard reports slightly less than 1.4V now. I bridged pins on CPU, but it also can be done on the mainboard (first I just opened hardware monitor in BIOS and carefully bridged the VRM pins to see if voltage reading changes).

Repair/electronic stuff videos: https://www.youtube.com/c/adalbertfix
ISA Wi-fi + USB in T3200SXC: https://www.youtube.com/watch?v=WX30t3lYezs
GUI programming for Windows 3.11 (the easy way): https://www.youtube.com/watch?v=d6L272OApVg

Reply 5 of 6, by adalbert

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slstoyanov wrote on 2022-11-07, 08:55:

Hello, could you please share which version of the graphic drivers you are using for the HD4650, because on my GA-60XOT system I'm having a lot of problems with the drivers.

I didn't remember, but it was visible at the end of the video I linked. Here is a screenshot of video card info:

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    driver-info.png
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    636 views
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    Public domain

Repair/electronic stuff videos: https://www.youtube.com/c/adalbertfix
ISA Wi-fi + USB in T3200SXC: https://www.youtube.com/watch?v=WX30t3lYezs
GUI programming for Windows 3.11 (the easy way): https://www.youtube.com/watch?v=d6L272OApVg

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