Topic: Lowering mem clock to idle speeds SPEEDS UP Mh/s - page 7. (Read 39026 times)
So each card probably has a sweet spot for mem clock
5870 here.
Going from 1200->275 mem makes no difference, and 275->900 makes it run 2-3 mhash higher, but the card is a lot louder and hotter at this setting as well.
Going from 1200->275 mem makes no difference, and 275->900 makes it run 2-3 mhash higher, but the card is a lot louder and hotter at this setting as well.
Quote
Got the unofficial clocks enabled.
I can get only as low as 525 @ MC.
But holy smokes I get now 256Mh/s on both of my sweeties.
Also my drivers crash occasionally, but 1000 @ CC seems to be the max for mysetup. no idea why, anything more crashes the drivers.
Thanks for the tip will be sticking @ low-MC from now on.
I can get only as low as 525 @ MC.
But holy smokes I get now 256Mh/s on both of my sweeties.
Also my drivers crash occasionally, but 1000 @ CC seems to be the max for mysetup. no idea why, anything more crashes the drivers.
Thanks for the tip will be sticking @ low-MC from now on.
no problem.... in order to get lower memory clocks please follow this:
1- Open MSI Afterburner
2- Set Memory Clock to the lowest possible or to desired amount
3- Click Apply
4- If Memory Clock is not to the desired amount, close MSI Afterburner
5- Repeat 1 to 4 until desired amount is reached
6- Set Fan Speed
Same can be done to get higher core clocks
My guess is this works for all ATI cards (4XXX and up) but it may only work for certain cards only
I've tried countless test, and I've concluded that for my 6870 at least, I get up to 5% Mh/s increase by forcing idle clock for mem (300 from 1050). All tests I have done are with OCed core clock (1000~1045 from 900)
I used MSI afterburner. At 250 mem clock I got a 10% DECREASE, at 900~1200 mem clock I get a 5% DECREASE from mem clock at 300
Give it a try
http://event.msi.com/vga/afterburner/download.htm
Go in your MSI afterburner folder in program files (X86 for me) and edit the msiafterburner.cfg
where you see [ATIADLHAL] make sure it looks like this:
[ATIADLHAL]
EnableUnofficialOverclocking = 1
UnofficialOverclockingEULA = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
UnofficialOverclockingMode = 2
AccessibilityCheckingPeriod = 0
in order to get lower memory clocks please follow this:
1- Open MSI Afterburner
2- Set Memory Clock to the lowest possible or to desired amount
3- Click Apply
4- If Memory Clock is not to the desired amount, close MSI Afterburner
5- Repeat 1 to 4 until desired amount is reached
6- Set Fan Speed
Same can be done to get higher core clocks
Donations are always welcome
167q1CHgVjzLCwQwQvJ3tRMUCrjfqvSznd
EDIT: It seems the most effecient memory clock is between 300 and 400. In my case, for 1020 core on a 6870 it is 344, you should experiment as well
I've tried countless test, and I've concluded that for my 6870 at least, I get up to 5% Mh/s increase by forcing idle clock for mem (300 from 1050). All tests I have done are with OCed core clock (1000~1045 from 900)
I used MSI afterburner. At 250 mem clock I got a 10% DECREASE, at 900~1200 mem clock I get a 5% DECREASE from mem clock at 300
Give it a try
http://event.msi.com/vga/afterburner/download.htm
Go in your MSI afterburner folder in program files (X86 for me) and edit the msiafterburner.cfg
where you see [ATIADLHAL] make sure it looks like this:
[ATIADLHAL]
EnableUnofficialOverclocking = 1
UnofficialOverclockingEULA = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
UnofficialOverclockingMode = 2
AccessibilityCheckingPeriod = 0
in order to get lower memory clocks please follow this:
1- Open MSI Afterburner
2- Set Memory Clock to the lowest possible or to desired amount
3- Click Apply
4- If Memory Clock is not to the desired amount, close MSI Afterburner
5- Repeat 1 to 4 until desired amount is reached
6- Set Fan Speed
Same can be done to get higher core clocks
Donations are always welcome
167q1CHgVjzLCwQwQvJ3tRMUCrjfqvSzndEDIT: It seems the most effecient memory clock is between 300 and 400. In my case, for 1020 core on a 6870 it is 344, you should experiment as well
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