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x1900 series Voltage limit

post #1 of 19
Thread Starter 
I'm in the process of manually overclocking my video cards using ATI Tool and I was wondering if there's a limit to the amount of voltage you should use. I understand heat is an issue, so with the fan speeds set at 100% I'm fairly confident in my GPU and Case cooling.

Right now I've got things set pretty much on stock, but I'm curious as to what other users may have their settings at.

VGPU - 1.425
MVDCC - 2.105
MVDDQ - 2.105
VDDCI - 1.501
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post #2 of 19
I've got the x1950xtx.

I've tweaked my volts a bit and they read:

VGPU: 1.475
MVDDC: 2.140
MVDDQ: 2.099
VDDCI: 1.379
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post #3 of 19
Thread Starter 
Anyone with x1900s??
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post #4 of 19
VGPU - 1.550
MVDCC - 2.127
MVDDQ - 2.127
VDDCI - 1.510

but that's a HOT affair... LOL
    
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post #5 of 19
my 1900 volts are at stock, im not OCing until my temps are sorted

------------

OFF TOPIC

sorry to post here but i cant PM

have you looked at your Temp Solution Needed thread?? i replied on there with something you should see Mike.
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post #6 of 19
Thread Starter 
Quote:
Originally Posted by Chozart
VGPU - 1.550
MVDCC - 2.127
MVDDQ - 2.127
VDDCI - 1.510

but that's a HOT affair... LOL
haha I'm sure it is. How do those Zalmans work for you? I'm thinking about getting those for my cards. My only concern is if they stick out further on the cards than the stock fans.
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post #7 of 19
Quote:
Originally Posted by Chozart
VGPU - 1.550
MVDCC - 2.127
MVDDQ - 2.127
VDDCI - 1.510

but that's a HOT affair... LOL
I've noticed that, at least on my card, dropping the add. voltage lowers the voltage regulator temp a lot.

Do you always run your Vcore at 1.550?
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post #8 of 19
They stick out as far as the stock fans, but need clearance to get good airflow. With a 120mm fan rigged behind them they keep my X1900's under control.

I've seen another cooler that seems huge but can be mounted either way... trying to find info again.
http://www.overclock.net/ati-cooling...s-rejoice.html

It's a monster, but as I said, can be mounted two ways... so.. it might work
    
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post #9 of 19
Thread Starter 
Wow that is a monster. Worth looking into anyway. It's on the egg for $50.
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post #10 of 19
Quote:
Originally Posted by Mootsfox
I've noticed that, at least on my card, dropping the add. voltage lowers the voltage regulator temp a lot.

Do you always run your Vcore at 1.550?
Nay... only when I run benchies... I have no reason to overclock the cards for daily use..
    
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