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Graphics overclock issue

 
 
Justin Thompson
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      05-18-2009, 10:15 AM
Hi all,

Hope you can help.

I have an ASUS P6T Deluxe V2 Mobo and graphics is an ATI 4870.

CPU is overclocked from a 2.66 GHtz to 3.33 GHtz and its all very
stable and runs as sweet as a nut..... with one little foible.

When I boot from cold - the machine runs fine - but if I play a
graphic intensive game I generally get some "stippling" (i.e. where th
epicture is corrupted with bright pixels). its not too bad, but there.
Now I understand that this happens if the graphics card is
stressed/overclocked a bit too much.

But the funny thing is... if I then reboot the machine with a warm
restart - the problem goes away and I can play all the games and get
zero "stippling".

So, what is happening to mean I have the problem only from a cold
boot? and is there anything I can do to avoid it.
(P.S. I would rather not mess with the voltages more than I have
already - and I dont mess with voltages between a cold and warm start
- so I guess its something else(.

Any help appreciated.

PPS... dont go mad on the technical please keep it simple enough that
I can understand..... ta ;-)

 
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Augustus
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      05-18-2009, 08:21 PM

"Justin Thompson" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Hi all,
>
> Hope you can help.
>
> I have an ASUS P6T Deluxe V2 Mobo and graphics is an ATI 4870.
>
> CPU is overclocked from a 2.66 GHtz to 3.33 GHtz and its all very
> stable and runs as sweet as a nut..... with one little foible.
>
> When I boot from cold - the machine runs fine - but if I play a
> graphic intensive game I generally get some "stippling" (i.e. where th
> epicture is corrupted with bright pixels). its not too bad, but there.
> Now I understand that this happens if the graphics card is
> stressed/overclocked a bit too much.
>
> But the funny thing is... if I then reboot the machine with a warm
> restart - the problem goes away and I can play all the games and get
> zero "stippling".
>
> So, what is happening to mean I have the problem only from a cold
> boot? and is there anything I can do to avoid it.
> (P.S. I would rather not mess with the voltages more than I have
> already - and I dont mess with voltages between a cold and warm start
> - so I guess its something else(.
>
> Any help appreciated.
>
> PPS... dont go mad on the technical please keep it simple enough that
> I can understand..... ta ;-)
>


Unless you have specifically overclocked the GPU and graphics card memory,
the graphics are not overclocked on your system. The issues you are getting
are likley related to a graphics card that has a flaky memory module, or the
PCIe bus speed is not locked, or your system overclock. Does it back off at
3.00Ghz?


 
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Guest
Posts: n/a
 
      05-18-2009, 09:16 PM
"Justin Thompson" <(E-Mail Removed)> wrote in message news:(E-Mail Removed)...
> Hi all,
>
> Hope you can help.
>
> I have an ASUS P6T Deluxe V2 Mobo and graphics is an ATI 4870.
>
> CPU is overclocked from a 2.66 GHtz to 3.33 GHtz and its all very
> stable and runs as sweet as a nut..... with one little foible.
>
> When I boot from cold - the machine runs fine - but if I play a
> graphic intensive game I generally get some "stippling" (i.e. where th
> epicture is corrupted with bright pixels). its not too bad, but there.
> Now I understand that this happens if the graphics card is
> stressed/overclocked a bit too much.
>
> But the funny thing is... if I then reboot the machine with a warm
> restart - the problem goes away and I can play all the games and get
> zero "stippling".
>
> So, what is happening to mean I have the problem only from a cold
> boot? and is there anything I can do to avoid it.
> (P.S. I would rather not mess with the voltages more than I have
> already - and I dont mess with voltages between a cold and warm start
> - so I guess its something else(.
>
> Any help appreciated.
>
> PPS... dont go mad on the technical please keep it simple enough that
> I can understand..... ta ;-)


I can almost guarantee that at least one overclock setting
is reverting back to default speed on a warm reboot. That
would account for the difference.

Are you overclocking the video card in addition to the cpu?
You should be able to trace the problem pretty easily: set
everything back to default speed, then overclock one thing
at a time and see when the corruption starts.
>



 
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