I would recommend having a read through this article at VR-Zone,

http://www.vr-zone.com/guides/wpcredit/

Not only can you download both Wcpredit & Wcprset (which you will need later to permanently apply your changes) but also they go into more detail and have a few more screenshots than I could manage. Download both files and extract them to Two directories of your choice, open Wcpredit and you will be presented with something very similar to this.

There are Three tool bar buttons labeled 8/16/32, select the 32bit button and you will end up with the same view I have a 4 x 8 display. Click on the section highlighted above, it corresponds to 70 on the left index and 0-8 on the upper index, and this displays the Registers at address offset 78-7Bh.

You will see several things change, mainly the data boxes at the base of the window labeled Offset Data and also the Hex/'Bin display. These windows show a more detailed view of the individual registers within that address. The Bin : 001001011101010001100110 etc shows the value of each individual bit as a 32bit representation. The bits are numbered 0-32 starting from the Right

We are interested in bits 10-9, 5-4, 3, 2-1 and 0. Some bits operate independently Others (ie 10-9) require a combination of settings. To change the setting you simply click the bit you want, don't worry about hitting the wrong one because the last display on the right shows the number of each bit as you select them.

The bits we are interested in are,

Bits 10 & 9 which control the Activate to precharge delay 00 = 7 clocks. 01 = 6 clocks. 10 = 5 clocks.

Bits 5 & 4 which control Cas latency 00 = 2.5 and 01 = 2 There is no option shown that represents Cas 1.5

Bit 3 which controls the Write Ras to Cas delay 0 = 3 clocks. 1 = 2 clocks.

Bits 2 & 1 which controls the Read Ras to Cas delay 00 = 5 clocks. 01 = 4 clocks. 10 = 3 clocks. 11 = 2 clocks.

Bit 0 which controls the Ras precharge 0 = 3 clocks. 1 = 2 clocks.

Lets do 10 & 9, click on bit 10 and confirm that "Bit 10" is displayed in the RH window. Change bit 10 to 1, the cursor will then move to the next in sequence bit 9, change this to 0.

We now have bits 10 & 9 reading 10 ie activate to precharge delay 5 clocks, we now need to save the change by hitting the "SET" command button in the bottom right hand corner. This was displaying "edit" but as soon as you make a change to any of the Bits the command name changes to Set. You will now see a message box saying "Data was changed, does it setup new register" respond Yes and hopefully you can still read this page! If you can then you have successfully changed the precharge delay to 5 clocks.

If however your system locked as soon as you hit the "Yes" button your memory at the current voltage/Fsb settings cannot run with that setting. No worries though at the next reboot try it again but set it for 6 clocks ie 01. It's worthwhile making One change then run a few things, Sandra for example so you can check things are stable and see what improvements you are getting for each change.

Do the same for the other Bit settings, make the changes to a whole group ie 10&9 and then set the changes, move on then to 5&4 again set the changes. You can after successfully applying the changes, go to the file menu and select "Register Save" it saves your current settings to a pcr file, which you can reload after a reboot. This saves going through the previous 4 changes if it happened to be the last setting, which caused a lockup. What can sometimes happen though when loading the pcr settings en-masse so to speak is that you may get a lockup even though each individual setting is OK applying them all at once is a bit too much for the chipset to cope with.

I will be back with a run through on using Wcpset which will allow you to apply your chosen settings at startup.

Cheers, Simon.

OK back again, so we have messed around with our memory timings and found a set that we are comfortable with, the next step is to make the changes permanent almost. This is where we use the Wpcrset, you need to install the program using the Instdd.exe, and you will be prompted to re-boot (losing your current settings)

When you boot back to windows open Wpcredit, make a note of the information in the lower left display and then open Wpcrset so you can see both together.

When you first open Wpcrset the Register Setting list will be blank, the example above are my current settings and may differ from your setups.

You need to note down the Offset i.e. 78 and the Data given beneath it i.e. 1F. Do this for all Four Offsets so you have the "before" settings which will more than likely be the same as the first Two screenshots at the top of the page. The next step is to re-apply your settings using Wpcredit as you did before, you will notice some of the Data changing as you apply each setting. When you are finished make a note of the Offsets that have changed and their Data value, this is the info we enter into the next window when we click the Add button.

We can ignore the Three left-hand fields it's the Register (same as Offset from the pic above) and Data fields we need. I only had Two Offsets change, 78 & 79 so in the Register/Offset field I enter 78 and in the Data field 1F, hit OK and then click Add to enter the next Register, which for me was 79 with a Data value of 04. Click OK to add that Register, check the Start option button is selected (by default Wpcrset opens with Stop selected) then OK again to apply the changes, Wpcrset will ask for a re-boot, when you get back to windows everything is running. At post the chipset will start with its normal settings, the changes are applied at windows startup.

If you want to remove or stop any of your amended Registers re-open Wpcrset and either select the Register and click remove or you can change the option button to Stop, reboot the machine and you will back to default. If you do have a problem getting back into windows Safe mode will bypass all of Wpcrset settings.

Hopefully a new Bios will sort all this out for us but until then, have fun.

Cheers, Simon.