Quick and dirty A64 clocking guide **UPDATE** X2 OC information!

[sam0t]

I would also like to see similiar or updated version of this guide for AM2 DDR2. I have been searching around little, but havent been able to find clear guide for AM2 DDR2 OC. Since I founded this thread superior for my Socket 939 OC, I would like to see similiar for AM2

 

[Avalon]

Originally posted by: sam0t
I would also like to see similiar or updated version of this guide for AM2 DDR2. I have been searching around little, but havent been able to find clear guide for AM2 DDR2 OC. Since I founded this thread superior for my Socket 939 OC, I would like to see similiar for AM2

There shouldn't be any significant difference. Your mem speeds will just be higher thanks to DDR2.

 

[jws2346]

Hey thanks a bunch. I'm currently building an AMD64 3000+, skt 939 box (I upgraded my skt 939 to an AMD x2 4200+) and I need all the horsepower I can get. I'm planning on running it 24/7 folding. I'm starting a small "truck patch" of computers folding. All I have now is one P4 2.60 GHz running 24/7. I fold on my PD 805 and 4200 when they're awake. ( which is pretty much all the time) One freakin' fantastic post.

 

[Kochab]

I ran across this info while reading up on undervolting: LINK

Basically, your VCore should be greater than or equal to VDimm/2 - 0.325V to be safe otherwise you run the risk of burning out your on-die memory controller.

BTW, good original post. nice & succinct.

 

[Joedeuce]

Hello all,

I recently put together the system in my sig and am curious what it will do. Of all the guides I read this one seems to put it to the point. Anyways, I am having trouble translating the guide to my settings in my bios. Here is what I have in my bios...

CPU Freq.
PCIEX16_1 clock
PCIEX16_2 clock
DDR2 Voltage Control
CPU Vcore Voltage Control
CPU Multiplier

Mem. Clock Freq
Tcl
Trcd
Trp
Tras
1T/2T Mem Timing

CPU Vcore offset voltage
DDR2 Termination Voltage
CPU -> NB HT Voltage
NB -> SB HT Voltage
NB Core -> PCI-E Voltage
SB Core -> PCI-E Voltage
SB Standby Core Voltage

NB to SB HT Freq
CPU <-> NB HT Speed
NB -> SB HT Speed
SB -> NB HT Speed
CPU <-> NB HT Width
NB <-> SB HT Width

If anyone could point me as to which one of these I am adjusting, I would much appreciate it!

Here's a link to the boards manual if you want to see ranges/variables for each setting.

FTP Link for Manual

Thanks!

 

[avi85]

Why isn't this stickied anymore? It still has some life left to it...

 

[saimike]

second the sticky.

 

[nebula]

I was hoping someone could explain to me why this is not working. I can boot to Windows at 250FSB, 4x HTT, and a 4:3 mem divider. I can take my FSB all the way to 280 and it's 5 minutes Prime stable. My question is, when I set FSB to 280 in the BIOS, it won't boot, why?

Does having all the memory settings at Auto have something to do with it? I can set them, but boy this board has several, which ones are important.

system in sig

 

[myocardia]

Originally posted by: Electric Amish
I ran through this today and can't get into windows or memtest with anything higher than 235mhz FSB and the mem settings you recommend. I can memtest and prime95 just fine at that speed.

The system is:

DFI Lanparty nF4 Ultra-D
Athlon 64 3700+ San Diego
1 Gig Corsair XMS PC3200 2-3-3-3-6

I'm currently running 235 x 11, 2.5-4-3-7 1T Running at 200mhz

Any suggestions?

Thanks for all the effort!

You're already at 2.6 Ghz. You're now going to have to start adding vcore. To keep your RAM out of the equation, you should put it on the 150 divider, before raising HTT any higher. You'll also need a 3x HTT multiplier to go higher than 250 HTT, obviously.

 

[myocardia]

Originally posted by: nebula
I was hoping someone could explain to me why this is not working. I can boot to Windows at 250FSB, 4x HTT, and a 4:3 mem divider. I can take my FSB all the way to 280 and it's 5 minutes Prime stable. My question is, when I set FSB to 280 in the BIOS, it won't boot, why?

Does having all the memory settings at Auto have something to do with it? I can set them, but boy this board has several, which ones are important.

system in sig

You need to read the first page of this thread again.

 

[nebula]

Maybe I didn?t state it well, but here are my findings from this procedure. I used ClockGen to get this.

Froze at 260 so max HTT = 1300
With HTT multi at 4x, can get FSB up to 300, board max = 2700 chip max
MemTest gave errors at anything above 215

So, shouldn?t I be able to do 9X multi, 280FSB, 4x HTT multi and a 4:3 ram divider which would give:
2500MHz
1120 HTT
187 RAM

(memory dividers are messed up on this board, or so I?ve read)

The only thing I see that may be an issue is the HTT above 1000, I guess I can try 3x and see if it boots. Of course, my tests say slightly above should be fine.

Another similar thread on a different forum suggests ClockGen to speed up the process, maybe that's my downfall?

 

[ibex333]

Originally posted by: Zebo
3. Memory MAX

It depends what you want and type of mem you chose, LL or Bandwidth but must keep 1T (command rate) because A64 suffers big time with 2T.

-For high bandwidth set mem setting to 200 and 2.5-4-3-7 1 T and give it boards max volts, or for LL set mem setting to 200 and 2-2-2-7 1 T and give it boards max volts.

Ehhh.... What is Bandwidth RAM? What is LL?

Which one do I have? (in sig)

 

[avi85]

Originally posted by: ibex333

Originally posted by: Zebo
3. Memory MAX

It depends what you want and type of mem you chose, LL or Bandwidth but must keep 1T (command rate) because A64 suffers big time with 2T.

-For high bandwidth set mem setting to 200 and 2.5-4-3-7 1 T and give it boards max volts, or for LL set mem setting to 200 and 2-2-2-7 1 T and give it boards max volts.

Ehhh.... What is Bandwidth RAM? What is LL?

Which one do I have? (in sig)

Bandwidth refers to the speed that the memory is running at (i.e. 200MHz) and LL is "lower latencies" i.e. the ram timings (2-3-3-6-1t for example).
see here, it has not been updated in a while but it's still pretty informative.

 

[myocardia]

Originally posted by: ibex333
Ehhh.... What is Bandwidth RAM? What is LL?

Which one do I have? (in sig)

You have value RAM. It's neither high bandwidth, nor low latency. You should be running with 2.70v of vdimm, and using the 166 Mhz RAM divider, or 2.80v of vdimm, and the 180 Mhz divider, if your RAM will do it (it should). That's assuming that you're going to stay at 2.4 Ghz. If you're wanting to go higher, use the 150 Mhz divider, so you can find out how fast your chip will go.

 

[nebula]

Originally posted by: myocardia

Originally posted by: nebula
I was hoping someone could explain to me why this is not working. I can boot to Windows at 250FSB, 4x HTT, and a 4:3 mem divider. I can take my FSB all the way to 280 and it's 5 minutes Prime stable. My question is, when I set FSB to 280 in the BIOS, it won't boot, why?

Does having all the memory settings at Auto have something to do with it? I can set them, but boy this board has several, which ones are important.

system in sig

You need to read the first page of this thread again.

Well thanks for making me rethink things. I dropped my HTT multi to 3x and set my ram timings manually to be sure, and now I have a Prime overnight stable system running at 300MHz FSB (board max) for an OC of 2.7GHz. I still can try to tighten my ram timings a bit if I feel the need. I shouldn't have put off doing this for so long...

 

[hclarkjr]

ttt

 

[IlllI]

TTT

 

[Aquila76]

Resticky this, please. This helped me out when OCing my first A64 rig (3500+ Winnie). It took me quite a while to find this again after getting my Opty 170.

 

[bchivers]

It depends what you want and type of mem you chose, LL or Bandwidth but must keep 1T (command rate) because A64 suffers big time with 2T.

If I run 1T I can get 2450MHZ without crashing, If I use 2T I can get 2800MHZ+. Am I still better to go with 1T, I would have to go from a 166 divider to a 150?

 

[avi85]

Originally posted by: bchivers

It depends what you want and type of mem you chose, LL or Bandwidth but must keep 1T (command rate) because A64 suffers big time with 2T.

If I run 1T I can get 2450MHZ without crashing, If I use 2T I can get 2800MHZ+. Am I still better to go with 1T, I would have to go from a 166 divider to a 150?

definitely go with the 2t if it will give you a higher cpu oc, although I don't see why you can't lower the memory divider and oc to 2800+ and still keep the 1t

 

[bchivers]

Originally posted by: avi85

Originally posted by: bchivers

It depends what you want and type of mem you chose, LL or Bandwidth but must keep 1T (command rate) because A64 suffers big time with 2T.

If I run 1T I can get 2450MHZ without crashing, If I use 2T I can get 2800MHZ+. Am I still better to go with 1T, I would have to go from a 166 divider to a 150?

definitely go with the 2t if it will give you a higher cpu oc, although I don't see why you can't lower the memory divider and oc to 2800+ and still keep the 1t

I was wondreing that also. Maybe I don't have something setup right.
Can I put in thumbnails in this forum, I have a couple of shots of A64Info?

 

[avi85]

Originally posted by: bchivers

Originally posted by: avi85

Originally posted by: bchivers

It depends what you want and type of mem you chose, LL or Bandwidth but must keep 1T (command rate) because A64 suffers big time with 2T.

If I run 1T I can get 2450MHZ without crashing, If I use 2T I can get 2800MHZ+. Am I still better to go with 1T, I would have to go from a 166 divider to a 150?

definitely go with the 2t if it will give you a higher cpu oc, although I don't see why you can't lower the memory divider and oc to 2800+ and still keep the 1t

I was wondreing that also. Maybe I don't have something setup right.
Can I put in thumbnails in this forum, I have a couple of shots of A64Info?

host them at imageshack and link to them in your post

 

[bchivers]

avi85 thanks for the imageshack link.
Here are the thumbs from A64Info.
http://img253.imageshack.us/my.php?image=screenshot0015cb.png]

[/URL]
http://img166.imageshack.us/my.php?image=screenshot0029jm.png]

[/URL]
http://img157.imageshack.us/my.php?image=screenshot0030nb.png]

[/URL]

 

[avi85]

Originally posted by: bchivers
avi85 thanks for the imageshack link.
Here are the thumbs from A64Info.
http://img253.imageshack.us/my.php?image=screenshot0015cb.png]

[/URL]
http://img166.imageshack.us/my.php?image=screenshot0029jm.png]

[/URL]
http://img157.imageshack.us/my.php?image=screenshot0030nb.png]

[/URL]

post screenies when oc'd to 2450MHz too.

 

[bchivers]

These were taken at 2450 then I went to 2500 and opened 3DMark 2005 and it immediately froze up.

http://img218.imageshack.us/my.php?image=screenshot0052lc.png]http://img218.imageshack.us/img218/8281/screenshot0052lc.th.png[
[URL=[url="http://img262.imageshack.us/my.php?image=screenshot0042dq.png"]http://img262.imageshack.us/my.php?image=screenshot0042dq.png[/url]][IMG]http://img262.imageshack.us/img262/631/screenshot0042dq.th.png[/URL]
http://img149.imageshack.us/my.php?image=screenshot0060bt.png]

[/URL]