WPCREDIT tweaks for the A64

[swaaye]

Yeah I'd say so. I compared 200Mhz at stock CPU to 200Mhz at 1.977 GHz on the 183 so I saw similar scores for both and new it was working.

So, PC3200 you get like 3.1GB/s. You just gotta scale your rating up with your clock. PC4000 is 250MHz, so yeah you look like you're scoring about right. The crazy efficency of the A64 memory controller lets you almost directly compare PCxxxx ratings to your test results.

[LilGator]

mem divider = ceil(CPU Multi * 200/183.3)
mem freq = CPU Freq / mem divider

What does 'ceil' mean ?

[CodeRed]

Originally posted by LilGator
mem divider = ceil(CPU Multi * 200/183.3)
mem freq = CPU Freq / mem divider

What does 'ceil' mean ?

ceil(x) means the next integer value >= x

its a standard C function ... it rounds up.

[LilGator]

Ah, makes sense Thx... so with a 9x multi the mem divider is 10x, perfect

[aschrate]

@CodeRed

thank you for this cool tool.

could you please give me a hint to the amd-documentation you read,
to find maybe the registers that are usefull to improve stability for
C0-stepping and 2xDS 512mb sticks. this combination gives a lot of
headace to me, because i can not run higher fsb then 230mhz
without freeze or other kind of crashing pc.

best regards

[CodeRed]

Originally posted by aschrate
@CodeRed

thank you for this cool tool.

could you please give me a hint to the amd-documentation you read,
to find maybe the registers that are usefull to improve stability for
C0-stepping and 2xDS 512mb sticks. this combination gives a lot of
headace to me, because i can not run higher fsb then 230mhz
without freeze or other kind of crashing pc.

best regards

This is a good guide to the register settings

http://www.amd.com/us-en/assets/cont...ocs/26094.PDFF

[aschrate]

thanks for the link,
something to read for the weekend

[Arnar]

Where do I get WPCREDIT?

[bias_hjorth]

Originally posted by Arnar
Where do I get WPCREDIT?

that was a joke right...
try look around 2 posts above you

[Iontach]

Hi Everyone,

I am having a problem with the RAM config on my new machine.

Cutting a long story short, I bought a Tyan Tiger K8W (AMD 8151 chipset) a single Opteron 250 and 1Gb of Corsair Registered CAS2 RAM (2x 512Mb DIMMS). The problem is that the RAM advertises that it can do 2-3-3-6 timings but it has 3-3-3-8 written into it's SPD. The BIOS on my mobo has no RAM timing adjustments at all so I cannot make the RAM run at the speed it is supposed to.

I posted about it on the Overclockers Australia forums and someone there suggested that I try using A64 Tweaker to solve my problem.

So I downloaded A64 Tweaker and fired it up but unfortunately whenever I try to adjust the RAM timings to what they should be my machine locks up as soon as I hit the "Set" button.

I can set CAS latency from 3 down to 2.5 and TRAS from 8 down to 7, but anything beyond that is no go.

So after all this I came over to these forums and read this whole thread and registered here so I could post this.

I don't really know much about this stuff at all and I have certainly never used anything like WPCREDIT before. But all the same I had a look through that AMD BIOS & Kernel Dev Guide PDF and I couldn't see anything in there that suggests that setting the RAM timings should be different for Opterons than other A64 chips. But then again maybe I just don't know what I am supposed to be looking for.

Should this work for me or is it a no go for Opterons or AMD 8151 chipsets? I really want to set CAS to 2 and TRAS to 6 since I paid a premium for this RAM expecting it to do those timings out of the box.

Are there other settings in A64 Tweaker that I could adjust that will allow me to set those timings and not lock-up my machine?

I know I may be grasping at straws here but I am desperate to get the performance I paid for out of my new rig.

You have my gratitude in advance for any light you can shed on this situation.

[CodeRed]

Iontach,

A64 tweaker will work will all the A64 family including opterons.

Looks like your mem just cant handle more aggresive timings. Try turning off ECC for a start and then up the mem voltage (if your board supports it).

[Iontach]

Heres an interesting thing. I looked in A64 Twekaer and the ECC Mode was set to "Disable". But when I reboot and check the BIOS it says that all ECC options were turned on. Which one is correct?

Anyway I turned all ECC options off in the BIOS. Rebooted, started up A64 Tweaker, set CAS to 2 and TRAS to 6 and hit Set and it locked up again. When I rebooted I got a CMOS checksum error and had to reset the BIOS. This is not the first time it has done this after rebooting from a lockup caused by A64 tweaker.

Anyway, with ECC off I can now set TRAS to 6 but I still cannot set CAS to 2.

You say it looks like my mem can't handle agressive timings, but I am not trying to overclock the memory at all, merely to achieve it's standard speed so these timings are not "agressive" at all when compared to the RAMS advertised spec. This memory is supposedly garunteed by Corsair to run at CAS 2.

Should I start thinking about asking for a refund?

---edit---

Sorry I forgot to mention that my BIOS has no RAM voltage options at all. Are there 3rd party utils for tweaking that too?

[CodeRed]

Originally posted by Iontach
Heres an interesting thing. I looked in A64 Twekaer and the ECC Mode was set to "Disable". But when I reboot and check the BIOS it says that all ECC options were turned on. Which one is correct?

Anyway I turned all ECC options off in the BIOS. Rebooted, started up A64 Tweaker, set CAS to 2 and TRAS to 6 and hit Set and it locked up again. When I rebooted I got a CMOS checksum error and had to reset the BIOS. This is not the first time it has done this after rebooting from a lockup caused by A64 tweaker.

Anyway, with ECC off I can now set TRAS to 6 but I still cannot set CAS to 2.

You say it looks like my mem can't handle agressive timings, but I am not trying to overclock the memory at all, merely to achieve it's standard speed so these timings are not "agressive" at all when compared to the RAMS advertised spec. This memory is supposedly garunteed by Corsair to run at CAS 2.

Should I start thinking about asking for a refund?

---edit---

Sorry I forgot to mention that my BIOS has no RAM voltage options at all. Are there 3rd party utils for tweaking that too?

Doesnt sound like you having much fun with that board

re ECC setting: A64 Tweaker is correct of course It reads the ECC enable bit directly from the DRAM controller registers

Another thing to remember is that if you apply settings that your system cant handle then expect a lock up.

what voltage is the RAM rated at?
tried different DIMM slots?

Also I just checked an old opteron data sheet and they only list 100, 133 and 166 MHz memory speeds with registered/ECC memory. Maybe this data sheet is too old (April 2003) or just maybe the opterons arent guaranteed by AMD to run 200 Mhz mem.

[Iontach]

When I bought this board I knew tweaking options would be minimal but I didn't intend to overclock anything so I thought it wasn't an issue.

Little did I know that tweaking is required in order to run Corsair XMS modules at their advertised speeds. Of course now that I am having troubles with the memory I have gone to the Corsair website and found all the fine print that says that the SPD will be JEDEC standard timings and the memory is only actually garunteed to run at the advertised speed on an ASUS SK8V motherboard.

I cannot find any indication as to what voltage the RAM is running at now nor what it should be run at. The BIOS does not tell me what voltage the RAM is running at, are their any 3rd party programs that can do this? I looked all over the corsair website and the product broschure PDF makes no mention of voltages at all.

FYI the memory I have is called Corsair TWINX1024R-3200C2 .

My motherboard manual says that I should always populate the RAM slots start from slot 1. I currently have DIMMS in slots 1 and 2 (there are four slots in total) which are the closest slots to the CPU. I can't see how moving the DIMMS to slots that are physically further away from the CPU could help to improve timing issues.

Originaly Opterons only used 333Mhz DDR RAM, but Opteron 246 and up will support 400Mhz DDR. My motherboard manual states that it supports 400Mhz registered DDR for Opteron 246 and up as well. (I have an Opteron 250).

[jess1313]

I am having problems with it starting on bootup. Its always worked before. Any sugestions, do I need to put it in the start menu or reinstall the prog. I installed the new one & let it wright over the other. Works perfect tho just want boot wih settings, & like I siad the other loaded on boot no prob.

OK I got it working, but this was strange. I uninstalled & put it in the start menu. When I booted it went crazy & loaded the wierdest bunch of settings. Turning ecc on & 2t on & all the dimm slots & set stuff to like 28 & crazy #s. It had 128 controller mode & other crazy stuff. Then it just striatened out & is working perfect & loading my settings on boot & everything. Dont ask me I have no idlea but its fine now.

Thanks CODE-RED

[zyx]

Nice Tweaker man

[CodeRed]

Originally posted by jess1313
I am having problems with it starting on bootup. Its always worked before. Any sugestions, do I need to put it in the start menu or reinstall the prog. I installed the new one & let it wright over the other. Works perfect tho just want boot wih settings, & like I siad the other loaded on boot no prob.

OK I got it working, but this was strange. I uninstalled & put it in the start menu. When I booted it went crazy & loaded the wierdest bunch of settings. Turning ecc on & 2t on & all the dimm slots & set stuff to like 28 & crazy #s. It had 128 controller mode & other crazy stuff. Then it just striatened out & is working perfect & loading my settings on boot & everything. Dont ask me I have no idlea but its fine now.

Thanks CODE-RED

I should probably re-iterate how to install V0.31 ... this will fix the startup type problems that some people are experiencing:

1. Remove A64 tweaker startup settings if it was installed before
2. Delete the following registry keys

HKLM\SYSTEM\CurrentControlSet\Services\io.sys
HKLM\SYSTEM\CurrentControlSet\Services\cpuz

3. Reboot
4. Install V0.31 and run it. The new driver and service will now be installed correctly ... with the correct file paths.

[IvanAndreevich]

There's this K8V SE Deluxe board Rev. 1.12 I'm playing around with and it's one of those boards that has a problem running DDR333 memory as 2:1 (ie DDR400). So if you set it to 2:1 in the bios it will still run as 5:3 to the HT speed. If I set MEMCLK frequency to "200 MHz", it freezes instantly.

Is this ASUS problem or K8T800 problem?

[CodeRed]

Originally posted by IvanAndreevich
There's this K8V SE Deluxe board Rev. 1.12 I'm playing around with and it's one of those boards that has a problem running DDR333 memory as 2:1 (ie DDR400). So if you set it to 2:1 in the bios it will still run as 5:3 to the HT speed. If I set MEMCLK frequency to "200 MHz", it freezes instantly.

Is this ASUS problem or K8T800 problem?

I dont know, since I havent used the K8T800 chipset or that particular ASUS board.

Id put my money on the ASUS board though as being the problem.

[jess1313]

Tryed this, same thing. Sometimes it would work & then it would go crazy. I dont no, I went back to the earlier version & all is well.
I run w2k if that has anything to do with. But like I said it works perfect now. Thanx

[IvanAndreevich]

CodeRed
Is there anything you could try to resolve that? I could beta-test on the K8V SE Dlx. It's just so damn annoying - having a DDR333 stick that can do DDR480 running @ 189 Mhz..

[GenTarkin]

I have a 3400+ CG @ 2.5ghz
I am running 1GB of PC3200 Samsung cheap ol memory...what settings can you use in this program to get good speed and latency out of this memory?
currently I am at...
Tcl=2.5
Trc=11
Trfc=14
Trcd=3
Trrd=2
Tras=10
Trp=3
Twr=3
Twtr=2
Trtw=4
Tref=200 3.9
ReadWriteQueueBypass=8
ControllerMode=64
ECCMode=disable
BypassMax=4
TwoTTiming=disable
MaxAsyncLatency=6
ReadPreamble=6
IdleCycleLimit=5.0
DynamicIdleCycleCounter=enable
MEMCLKFrequency=200
MEMCLK0=1
MEMCLK1=1
MEMCLK2=0
MEMCLK3=0
225mhz

any recommendations? Thanks

[CodeRed]

Originally posted by IvanAndreevich
CodeRed
Is there anything you could try to resolve that? I could beta-test on the K8V SE Dlx. It's just so damn annoying - having a DDR333 stick that can do DDR480 running @ 189 Mhz..

Id just like to confirm that this is a BIOS problem. The ASUS BIOS wont allow you to set DDR333 memory to 200 MHz. Is this correct?

Does your board also freeze when you set the mem clock frequency to 200 MHz ?

[CodeRed]

Originally posted by GenTarkin
I have a 3400+ CG @ 2.5ghz
I am running 1GB of PC3200 Samsung cheap ol memory...what settings can you use in this program to get good speed and latency out of this memory?
currently I am at...

Try this:
Tcl=2.5
Trc=11 ---> 7 or 8 (not so important)
Trfc=14
Trcd=3 ---> 2 (most important)
Trrd=2
Tras=10 --> 5 (important)
Trp=3
Twr=3
Twtr=2
Trtw=4
Tref=200 3.9
ReadWriteQueueBypass=8 ----> 16
ControllerMode=64
ECCMode=disable
BypassMax=4 ----> 7
TwoTTiming=disable
MaxAsyncLatency=6
ReadPreamble=6
IdleCycleLimit=5.0 ---> 16 clocks
DynamicIdleCycleCounter=enable
MEMCLKFrequency=200
MEMCLK0=1
MEMCLK1=1
MEMCLK2=0
MEMCLK3=0

Those settings will help but then again your memory may not run with these timings.

If you can get away with the above settings then take it the next step and set these:
Trp=2
Twr=2
Twtr=1
Trtw=1

[blass]

version V0.31 works on my system now!! no more error messages. and the settings stay everytime I reboot!!! CODERED!! CODERED!!