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X850 pro black screen

post #1 of 17
Thread Starter 
Hey,
I have been sifting through information for days and days without finding an answer to my questions or maybe just not looking in the right places. Overclock.net seems like the best place to ask so here it goes....

General information:

Performed the x850 pro to x850 xtpe mod then flashed back to my original x850 pro bios to regain fan control. Works fine. When trying to find the max core in atitray or ati tools maxcore has no artificts everand temp stays below 65 as shown by atitray, but when it hits 520 windows freezes, the mouse still works, then 5 seconds later the screen goes blank (black screen) nothing responds, the fan on the GPU slows down to normal speeds, i have to hit the reset button to restart the computer. Screen refresh rate is set to 60 Hz, with a maximum possible of 75 Hz. Happens either way.

Questions:

1. Does it matter when trying to overclock that I have a x850 pro Bios even though the 16p are unlocked?

2. If it would help to flash the xtpe bios, is there one that will still allow me to have fan control? I tried one claiming to have fan control but it didn't.

3. Is it possible that my first artifact IS the freeze up and thats it for my card? I understand that you should get minor dots or something at least as a warning.

4. As a side question, when my card has a pro bios, Catalyst does not show overdrive tab (atipoll is running), when my card has xt or xtpe bios the overdrive tab is there. What do I need to do to get the overdrive tab with the pro bios with 16p active?

Thank you in advance to anyone who will help me understand.
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post #2 of 17
The bios shouldn't affect the overclock that you can reach. If you need the fan control then stay with that bios.
The freeze during ATiTool is because the card doesn't have enough power. A higher spec psu should allow you to o/c further. I had my old card upto 540Mhz on the core, so not much further than you.
Not sure about the Overdrive facility, but if you're using ATiTool to overclock then there's no point in having the overdrive facility. They both do the same thing, overclock the card.
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post #3 of 17
Thread Starter 
Thank you for the advice.

You beleive it is my power supply then? I thought 485 would be plenty, even if 70% efficient. I will try disconnecting unnecessary components and see if it makes a difference.
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post #4 of 17
Quote:
Originally Posted by CrazyMan
Thank you for the advice.

You beleive it is my power supply then? I thought 485 would be plenty, even if 70% efficient. I will try disconnecting unnecessary components and see if it makes a difference.
Yeah, it's definitely a power issue. Your psu is plenty powerful enough for stock, but it draws a fair bit more power when overclocked. My old Thermaltake 560W psu would shut down at about the same speed as yours is now.
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post #5 of 17
I can run my x850pro to 575 core, but when I run mem above 520 it will crash on me. You might uncheck the vpu recover in catalyst.
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post #6 of 17
Thread Starter 
Ok,
No change on the system crash with other components disconnected.
I have vpu recover turned on, there really isn't anything else I can do there.
If it is my PSU what kind would you recommend? Does this mean that someone who has an xtpe needs a larger power supply than I have, or does an OC x850 pro draw more power than the xtpe at the same clock speeds? Sorry if this is a really basic noob question, but I can't help what I am....
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post #7 of 17
Quote:
Originally Posted by CrazyMan
Ok,
No change on the system crash with other components disconnected.
I have vpu recover turned on, there really isn't anything else I can do there.
If it is my PSU what kind would you recommend? Does this mean that someone who has an xtpe needs a larger power supply than I have, or does an OC x850 pro draw more power than the xtpe at the same clock speeds? Sorry if this is a really basic noob question, but I can't help what I am....
Just brought the specs up and you have a dual rail 15A and 18A.
Is there anything else plugged into the PSUs rail? If so, try moving the components to the other rail and see if that helps.
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Clevo P170HM
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post #8 of 17
Thread Starter 
Okay, thanks for all the help Ste by the way.
I am assuming the one rail is the one that supplies the mobo with the 12 and 4 pin mobo connectors, it also has an extra 4 accessory connector supposedly for the graphics card. I hooked that one to the gpu and there was no change, so I hooked it up to my HD and unhooked all other devices. I am assuming the other arm with like 15 connectors comming out of it is the other rail. I then just hooked up that entire rail to the gpu and ........... no different, it still stalls out at 521 with temperature not reaching 60 and no detected artifacts. This means that my GPU has access to at least 126 W (assuming 15Ax12Vx.7) to be correct That is enough power for a 1900xtx, the x850xtpe requires 92W (http://www.atomicmpc.com.au/forums.asp?s=2&c=7&t=9354). Are we still sure that it is the power supply? I just think its fishy that it stalls at exactly 521 each time with no artifacts or any warning and the gpu temperature never exceeding 65, reguardless of how many devices or if the gpu is on its own 12V rail.
Additional Information: If I leave the machine for 10 seconds or more after a freezeup before restarting, sometimes windows boots up with the display showing in 8 bit, but not all the time. Does this shed any light for anyone?

Is it possible that my card can be perfectly stable at 520 and then unable to function at 521 to the point that it freezes the system? Why does the system freeze by the way?
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post #9 of 17
Nope, can't be sure of anything without testing. All I know is that the GFX isn't getting enough power and hence the shutting down/freezing.
The psu is the likely cause of this (for obvious reasons) and a new psu solved the problem, for me, in a similar scenario.
The x1900 range has adjustable voltage controls and does exactly the same thing. On one setting it's fine, move it up a bit and it freezes. Up the core voltage slightly and it's fine again.

Either the card needs a volt mod to get higher, or it's not getting enough power from the psu. As your o/c is quite low in comparison to others, my bet is on the psu.
Clevo P170HM
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Clevo P170HM
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post #10 of 17
Thread Starter 
Thanx,
You Rock!
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