Tualatin boards and PC133 SDRAM

Caiwyn

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May 19, 2000
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So I picked up an Abit ST-6 RAID motherboard because I've had pretty good experiences with Abit boards recently, and because it's one of the first Tualatin boards - I wanted that extra upgradeability. Well, I've got 512 MB of Registered PC133 ECC Cas2 SDRAM that I bought from Crucial, which I popped into the board... but when I go into the BIOS and set the DRAM clock at 133 mHz instead of the default 100 mHz, the machine doesn't boot! Instead, the PC speaker just starts beeping and nothing else happens.

Another thing... no matter how the board is configured, there's a red LED on the motherboard that comes on and stays on as long as the power supply is plugged in. The LED is labeled as D16 in a diagram in the mobo's documentation, but nowhere does the documentation actually say what it is. It's right next to the chassis intrusion detection pin, but nothing's connected to that and I doubt it has anything to do with that. I'm fairly certain it's not a heat warning because the board's current temperature shows up in the BIOS when it's turned on, and it's nowhere near overheating.

Anybody have any idea what the heck is going on here? Are all the Tualatin boards like this - do I have to use an old 815EP board to get my RAM up to 133 mHz? Help!
 

AndyHui

Administrator Emeritus<br>Elite Member<br>AT FAQ M
Oct 9, 1999
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For one thing, no i815E/P board likes ECC SDRAM.....the chipset doesn't support it.

I think that LED simply indicates that there is power to the board. Most boards have one of those these days.
 

SCSIRAID

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May 18, 2001
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I believe the LED is indicating that &quot;Standby&quot; or &quot;continuous&quot; power is applied. The LED should be on anytime the system is plugged in whether it is actually running or not.
 

Caiwyn

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May 19, 2000
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Well, geez... why'd they make the LED red then? It looks like a great big warning light.

As for the 815EP chipset not supporting ECC RAM... Are you serious? Isn't that a bad thing?
 

AndyHui

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If I wasn't serious I wouldn't have said anything about it. The i815E/P chipset was always meant to be a low end/mid range option. According to Intel, it doesn't need &quot;high end&quot; options like ECC SDRAM support...so they left it off.

As to whether or not it is a bad thing, I don't think it's bad, since at the time of chipset design, ECC RAM was so much more expensive than regular SDRAM.
 

SCSIRAID

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May 18, 2001
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Thats a good point... The one on my Asus is green. Red usually indicates bad things....
 

Caiwyn

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May 19, 2000
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Crazy. Thanks for the info, Andy, I had no idea... I guess there aren't any P3 chipsets that support ECC, eh?
 

AndyHui

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Oct 9, 1999
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BX, i820, i840 support ECC....of course, the i820 and i840 are RDRAM rather than SDRAM.

The VIA Apollo Pro 133A and Apollo Pro 266 chipsets support ECC.
 

Caiwyn

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May 19, 2000
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Well, rats. And the i820 chipset doesn't support ATA/100 either, which is more important. Exactly how important is ECC support in content creation programs, do you think? I'm doing heavy content creation stuff here.