Skyline said:
I have been getting problems with my machine. When i use the startup profile that i have set with ATI tool (625/750) all seems ok and runs games fine etc but then i try to play a mpeg video file (From youtube, break.com etc) the screen just locks up with a single colour (Has been blue, white and black) then after a short while the monitor will power off. I can still hear the video in the background. But then i cant get it back to desktop and have to reboot. But when it reboots the bios just hangs just after the cpu is detected and the only way to get it back is to reset the bios and reset up the options and everything works again. But i have just removed the profile and rebooted and the machine works fine and plays videos with no problems...
Is this down to the 2D/3D aspect of the overclocking?
Why would it effect anything in the bios?
Any help would be appreciated...
Here's some info I put together on my overclocking tests:
I've tried most options available to clock my X1800XT 512MB:
1. ATI Tool 0.25 Beta 14
2. RivaTuner
3. Overclocker X1K
4. Catalyst control centre
5. Other (BIOS flash)
ATI Tool:
-Used the latest Beta 14 version
-Clocks ok, artifact detector seems to work for me, but errors very early.
-Sometimes cause system hang when switching from 2D to 3D clocks and back.
-Causes system hang on switch to 3D clocks when starting BF2 with Cat 6.5s, works fine with 6.3s
-ALLOWS VOLTAGE CONTROL
RivaTuner
-Great hardware monitor
-Clocks my card fine when I turn off enable overdive in the MORE section on the overclocking tab
-Seems to give me errors at lower clocks, may have to do with memory timings
-No voltage options
-2D/3D seperation can be achieved by using profiles for individual applications. There is also an option for Overdrive clocking, but this simply caused my clocks not to change in 3D mode when I tried it with the Omega 6.3s. Will try with the 6.5s and report back.
Overclocker X1K
-Tried briefly, simply alters clock speeds.
-IIRC it allows core voltage adjustment, but memory didn't work on mine.
Catalyst Control Centre
-Trying it now with 6.5s
-Only allows upto 690 Core 800 Memory
-Smooth 2D/3D switch, hasn't caused me any lock ups yet
-No voltage options
Others:
BIOS flash -> tried flashing my card to X1800XT PE, only works with 512mb cards, but is very simple to do and is done via windows.
Was getting slight memory errors so flashed back.
Boosts clocks to 700/800 iirc, and ups core voltage slightly, should be fine on air as the real Sapphire X1800XT PEs use the same cooler and are identical apart from clocks.
Tips:
It seems memory voltage can often to be REDUCED to get better clocks on the memory, I found that reducing MVDDC from its 2.097 stock to as little as 1.825V continued to give me gains on memory clocks. I'm not the only person to have found this though the sweet spot is different for others, and the memory on my card sucks, it can't do 800Mhz without artifacts so far.
