WPCREDIT tweaks for the A64

Can someone take a look at section 3.3.13 of the BIOS and Kernel Developer's Guide? This register has some Read-Only bits which specify the valid settings (there are 16 available) for LDT Link Frequency. Are any of the "reserved" settings available? If so, what LDT multipliers do they correspond to? Are there any "hidden" settings in addition to 1x, 2x, 3x, 4x, and 5x? Even if additional settings are available, it may be the case that chipset support is needed in order to get it to work. Both sides need to communicate at the same rate.

EDIT: I found the following in the HyperTransport 2.0 specification doc.

Table 54. Link Frequency Bit Field Encoding
Link Frequency Encoding Transmitter Clock Frequency (MHz)
0000 200 (default)
0001 300
0010 400
0011 500
0100 600
0101 800
0110 1000
0111 1200
1000 1400
1001 1600*
1010 to 1110 Reserved
1111 Vendor-Specific
Note: Electrical requirements of the link above 1400MHz have not been fully specified at this time.

I guess there are no in-between multipliers other than 1.5x and 2.5x. The "Vendor-Specific" setting is 100 MHz (from the BIOS and Kernel Developer's Guide).

Thomase

there is version 0.5XT of A64 tweaker which allows you to view all the link parameters, but uinfortunately setting them has no effect unless the link or CPU is reset. Since the LDT speed doesnt seem to affect benchmarks a great deal I didnt persue this line of tweaking.

I enabled STPGNT (Bus 0 Device 24 Function 3 Register 80 set to 01). But it didn't help my idle Temps and made MSI CoreCenter lockup the whole comp, maybe its useful on other configurations.

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Originally Posted by CodeRed

Try deleteing the following registry key, and reboot:
HKLM\SYSTEM\CurrentControlSet\Services\cpuz

Then run the tweaker from your install directory. Make sure you have admin priveleages and write permissions to the install dir.

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Awsome.. that fixed it for me too.. :)

Great program thanks alot..

Is it possible to enable 2T Timing when it's at 1T by default? I'm trying to get my RAM up to 200Mhz from 166.

While I'm posting I might as well ask what settings are most likely to get the RAM stable. For sure Tcl, Trcd, Tras. What else is essential? Or maybe, what settings would the worst PC3200 in existence use? :)

you mean command rate of 2T? yeah see on the right hand side where it says "2T timing" put it to enable.

now I heard somewhere that older C0 chips are not capable of 2T timing...or are 1T by default but dont like being changed to 2T or something like that.

2T Timing switches back to disable when I hit apply.

What settings would be conservative for the right panel? I don't know what to make of most of those.... the left panel just requires a higher number :)

C0 chips do not physically support 2T timing. swaaye check with CPUZ which Rev it is.

hey everybody~~~~Please take a look at this page.
http://www.xtremesystems.org/forums/...ad.php?t=48448
mem clock ratio unchangedable on epox 9nda3j whatever i use wpcredit or a64tweaker~~~~

dont know if this has been addresses but if i try to set my trfc to anything below 15, which is default, it locks up immediately...

i have ocz vx btw

CodeRed don't strain the brain! There is no any way to change the link frequency without support of a huge number Southbridges. I know how to change the link frequency by asserting LDTSTOP_L, but it works only with AMD-8111 I/O hub.
IvanAndreevich Ã�ðèâåò èç Ã�åëÃ:banana:ðóñè! Ñ Ã�îâûì Ãîäîì! :D

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Originally Posted by VVJ

CodeRed don't strain the brain! There is no any way to change the link frequency without support of a huge number Southbridges. I know how to change the link frequency by asserting LDTSTOP_L, but it works only with AMD-8111 I/O hub.
IvanAndreevich Ã�ðèâåò èç Ã�åëÃ:banana:ðóñè! Ñ Ã�îâûì Ãîäîì! :D

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please tell me what country your in?.....good day to you :thumbsup:

Hi eagle101! I'm from Belarus (Eastern Europe). Happy New Year! :)

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Originally Posted by Falcon

My current timings or (defalut) w/e are 2.5-11-14-4-2-14-4-3-1-4. And also are there anything on the Configuration Parameters that i can do to help?

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what kind of mems do you have ? :)

I have an Neo2 and tccds sync @ 2,5-3-3-8 and 1T what should I change to get petter performance? Can't find a "guide" for the best values...

Quote:

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Originally Posted by VVJ

CodeRed don't strain the brain! There is no any way to change the link frequency without support of a huge number Southbridges. I know how to change the link frequency by asserting LDTSTOP_L, but it works only with AMD-8111 I/O hub.
IvanAndreevich Ã�ðèâåò èç Ã�åëÃ:banana:ðóñè! Ñ Ã�îâûì Ãîäîì! :D

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I already came to that conclusion too, so I abandoned the link settings in A64 Tweaker.

Can anyone help me figure out how to best tweak my memory settings?

I have a laptop AMD64 3700+ with 2 SODIMMs of 512 MB DDR400 Corsair memory. I currently have A64Tweaker set to 3-7-10-3-2-5-2-2-2-4 as far as timings go. What should I set the MEMCLK Frequency, Refresh Rate, etc to?

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Originally Posted by TSFroggy

Can anyone help me figure out how to best tweak my memory settings?

I have a laptop AMD64 3700+ with 2 SODIMMs of 512 MB DDR400 Corsair memory. I currently have A64Tweaker set to 3-7-10-3-2-5-2-2-2-4 as far as timings go. What should I set the MEMCLK Frequency, Refresh Rate, etc to?

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MEMCLK frequency should be set to 200 if you want 1:1 operation.
Dont worry about the Refresh Rate, leave the BIOS setting until you've figured out the rest.

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Originally Posted by CodeRed

Tref is the DRAM refresh rate. Refresh doesnt happen that often so it doesnt affect performance to badly. The less frequency refresh rates are best for performance, but it wont make any noticeable difference

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i have a k8ns-ultra 939 and alot of the options are already available in bios... with the Tref - there are all sorts of values - and I dn't know too much about how to interpret it..

if i press Enter on it, the item at the top (which usually is lowest value) says 1x1592 or some numberlike that, while 2nd from the buttom it's 4x4672, and then at the VERY bottom, it's 128...

i'm wondering which one to use will give me best performance, and will changing this affect overclockability AT ALL?

Edit: I have already figured out the rest. Oh, 1 other thing, my Trc is set to 8 at the moment because you guys say it's the best performance? Well I can set this to 7 actualy, and it seems fine to me... hmmm

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Originally Posted by groovetek

i have a k8ns-ultra 939 and alot of the options are already available in bios... with the Tref - there are all sorts of values - and I dn't know too much about how to interpret it..

if i press Enter on it, the item at the top (which usually is lowest value) says 1x1592 or some numberlike that, while 2nd from the buttom it's 4x4672, and then at the VERY bottom, it's 128...

i'm wondering which one to use will give me best performance, and will changing this affect overclockability AT ALL?

Edit: I have already figured out the rest. Oh, 1 other thing, my Trc is set to 8 at the moment because you guys say it's the best performance? Well I can set this to 7 actualy, and it seems fine to me... hmmm

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I didnt find that the refresh rate affects the OC much at all, but it may depend on the memory type.

The lowest refresh rate is best for performance, 15.6usec @ 200 MHz in A64 Tweaker. Not sure how the GB BIOS values relate exactly to the A64 tweaker values (from the AMD data sheets).

Quick question - I am at 218 memory speed - OCZ PC3200 Plat Rev2 2x512
Timings etc using a64 Tweaker are

2-8-12-2-2-5-2-2-1-2
16x, 7x, 6ns, 5.5ns, 16clk
2.7 VDimm

Crashes at 219 - wont load windows or if you up it when in windows it crashes.

What is best parameter to slacken?

try relaxing the +6ns, +5.5ns.

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Originally Posted by goreblast

Quick question - I am at 218 memory speed - OCZ PC3200 Plat Rev2 2x512
Timings etc using a64 Tweaker are

2-8-12-2-2-5-2-2-1-2
16x, 7x, 6ns, 5.5ns, 16clk
2.7 VDimm

Crashes at 219 - wont load windows or if you up it when in windows it crashes.

What is best parameter to slacken?

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Firstly make sure its the mem thats holding you back, then try a touch more voltage

if that dont work then try upping each setting indiviually until something lets you go a bit higher
eg
2-8-2-2-5-2-2-2-2 as the next step up

CodeRed, i have a CG stepping 3200+, is there any way I can run 1T since I can't boot with it. I only see enable 2T timing but I don't see a 1T option.

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Originally Posted by Ulti

CodeRed, i have a CG stepping 3200+, is there any way I can run 1T since I can't boot with it. I only see enable 2T timing but I don't see a 1T option.

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Set the 2T option to disable :)