Overclocking 939 0.09 question

[Wingless]

hey.I am bying an Amd Athlon 3200 64 Socket 939 Cpu and i am going to OC it much but i am not sure about ram...
Got a question...
Does ram make a difference in OC CPU(Voltage,FSB) i dont know anything about it.... (newb)
What ram should i get to OC that CPU to the limit
And what Air Cooler is the best for that CPU(not stock..)
Thanx

[mustrum]

You can OC the CPU totally independant from the RAM. You can set a ratio for your ram so your HTT is not in sync with the memory bus. This is no problem other than on Athlon XPs. Sure a higher memory clock gives you more memory bandwith and performance but it's not as essential as it is on AXPs.
The best RAM for winny OCing is TCCD (i think) modules.
Gskill 4400 seem to work best i read.

[Bill The Cat]

Like Mustrum said, memory is completely independent of CPU clocking if you wish it to be.

For instance, I'm a big CPU overclocker, but could care less about my RAM. I've got some no-name brand there, and while my CPU is beat to death, my ram runs at more or less stock speed.

[Wingless]

Like Mustrum said, memory is completely independent of CPU clocking if you wish it to be.

For instance, I'm a big CPU overclocker, but could care less about my RAM. I've got some no-name brand there, and while my CPU is beat to death, my ram runs at more or less stock speed.
How did u Oc ur cpu?
1) Did u increase FSB(htt) if u inceased ur FSb u must have had a good mem(which is 3700 PC) unless u set up different mem ratio or something like that...
2)Vcore?To increase htt? (newb)
3)or what?

[mustrum]

How did u Oc ur cpu?
1) Did u increase FSB(htt) if u inceased ur FSb u must have had a good mem(which is 3700 PC) unless u set up different mem ratio or something like that...
2)Vcore?To increase htt? (newb)
3)or what?
I am doing it like him:
How you do it: Set a high HTT (you must lower the HTT multiplier to 3x before you do that or you will freeze) for high CPU clocks.
Set the memory to either 133 or 166mhz. It will result in a ratio.
HTT at 280x9 results in 2.6ghz CPU clocks. If you set the mem at 133 it results in 194mhz memory clock, 166 in 245mhz mem clock.

Edit: there's a 100mhz ratio setting too for the case you have really crappy RAM that can't even do 190+.

[Wingless]

I am doing it like him:
How you do it: Set a high HTT (you must lower the HTT multiplier to 3x before you do that or you will freeze) for high CPU clocks.
Set the memory to either 133 or 166mhz. It will result in a ratio.
HTT at 280x9 results in 2.6ghz CPU clocks. If you set the mem at 133 it results in 194mhz memory clock, 166 in 245mhz mem clock.

Edit: there's a 100mhz ratio setting too for the case you have really crappy RAM that can't even do 190+.
Will u explain this to me when I buy my new CPU...Btw i wanna get either 3200 or 3500...
Ok.Just for now can u show me step by step guide:
-why and how u set the multiplier and what it is
-why and how u set the memory rate to that and what it does to the mem performance.(I guess u decrease the DDR rate)
-what Htt should i try if it is 3200/3500 AMD?


I hope it is all good to ask u that much..i just need to know it.... :rolleyes2

[Riptide]

What you need is a guide. Here's something for starters:
http://www.insanetek.com/index.php?page=overclocka64

I suggest doing some searching yourself on google/yahoo.

[Blacklash]

I have heard of a few fellows saying they killed the on die memory controller by overvolting. Advice? Proceed with caution and use the lowest voltage possible when overclocking.

My advice particularly if you are on air, with a 3200 or 3500 would be 250x10 1:1 4xHT shoot for 1T timing, if you can't hold it do 2T. I'd try 2.5-3-3-8 on my ram or maybe 2.5-3-3-10/11 for more stability.

[Bill The Cat]

I have heard of a few fellows saying they killed the on die memory controller by overvolting. Advice? Proceed with caution and use the lowest voltage possible when overclocking.

My advice particularly if you are on air, with a 3200 or 3500 would be 250x10 1:1 4xHT shoot for 1T timing, if you can't hold it do 2T. I'd try 2.5-3-3-8 on my ram or maybe 2.5-3-3-10/11 for more stability.

Agreed. Overvolting scares me. I run the 10% rule when dealing with voltages, limiting myself to ten percent increase in Vcore. My Vcore at the moment is 1.525, and she runs Prime95 like a pro at 2.4 (Sig is incorrect).
Rage's Vcore of 1.7 is only for the bold in my opinion :-P.

To answer Wingless: My FSB is at 265. My memory is set to 166, resulting in a RAM frequency of 217 mhz. My HTT is at 3x, like mustrum said.
2.) Vcore has nothing to do with HTT. Vcore is for the CPU exclusively, to allow for higher FSB's. As I said above, my Vcore is at 1.525. I wouldn't want to go much higher than that, but your individual sense of adventure may vay.

[Riptide]

There is usually a separate control for HTT voltage. W/my FX53 it defaults to 1.2v.

[mustrum]

Agreed. Overvolting scares me. I run the 10% rule when dealing with voltages, limiting myself to ten percent increase in Vcore. My Vcore at the moment is 1.525, and she runs Prime95 like a pro at 2.4 (Sig is incorrect).
Rage's Vcore of 1.7 is only for the bold in my opinion :-P.

To answer Wingless: My FSB is at 265. My memory is set to 166, resulting in a RAM frequency of 217 mhz. My HTT is at 3x, like mustrum said.
2.) Vcore has nothing to do with HTT. Vcore is for the CPU exclusively, to allow for higher FSB's. As I said above, my Vcore is at 1.525. I wouldn't want to go much higher than that, but your individual sense of adventure may vay.
Huh? Your FSB ist at 265? I guess you mean HTT but if it's at 265 you're running at 2385mhz and not at 2600mhz? Do i miss something here?

[saturnotaku]

and she runs Prime95 like a pro at 2.4 (Sig is incorrect).

;)

[Bill The Cat]

Huh? Your FSB ist at 265? I guess you mean HTT but if it's at 265 you're running at 2385mhz and not at 2600mhz? Do i miss something here?

It is 2385. I just round it off to a clean number. I also don't think my Shuttle has an option for HTT voltage. I'll have to check - Didn't know it was adjustable.

Sig is now fixed :-P.

[mustrum]

It is 2385. I just round it off to a clean number. I also don't think my Shuttle has an option for HTT voltage. I'll have to check - Didn't know it was adjustable.

Sig is now fixed :-P.
Ahh. Too bad. I hoped you found divider. :D
I'm running at 2.6ghz but my RAM is only at 192mhz since it can't do the 245mhz memtest stable i get when i use the 166 divider.
I am having great performance though so i shouldn't nag around i guess. :D

[Wingless]

I am doing it like him:
How you do it: Set a high HTT (you must lower the HTT multiplier to 3x before you do that or you will freeze) for high CPU clocks.
Set the memory to either 133 or 166mhz. It will result in a ratio.
HTT at 280x9 results in 2.6ghz CPU clocks. If you set the mem at 133 it results in 194mhz memory clock, 166 in 245mhz mem clock.

Edit: there's a 100mhz ratio setting too for the case you have really crappy RAM that can't even do 190+.
Ok i almost get it...(i am a lil retarded)..
1) Why do u have to set ur memory to 133 or 166 and what is the Default setting in bios?I undersand that if u raise FSB the memory goes up as well but why 133 or 166?what does that mean?
2)I'd try 2.5-3-3-8 on my ram or maybe 2.5-3-3-10/11 for more stability.--- i dont get that memory stuff at all

Thank you so much I understand 70 % of it..just need 30 more... :)

[saturnotaku]

Ok i almost get it...(i am a lil retarded)..
1) Why do u have to set ur memory to 133 or 166 and what is the Default setting in bios?I undersand that if u raise FSB the memory goes up as well but why 133 or 166?what does that mean?

First, you'd look slightly less retarded if you spelled out the word "you" - it's two more keystrokes, I think you can manage.

The default BIOS setting on the Neo2 is auto, that means the memory will run in-sync with your FSB. 225 FSB = 225 MHz memory (or 450 MHz DDR). Having the memory and FSB in-sync is ideal, but your memory has to be able to handle the increased speed. If you have DDR400/PC3200, it's probably not going to be able to handle a FSB much past 225-230 - and that's if you have some really high quality sticks.

If you want to achieve a crazy high FSB (>=250 MHz) you have two choices. The expensive way - buy memory that's rated as DDR500 or higher to attempt to run 1:1. Or the not-so-expensive way - set the memory ratio to 166 MHz. Now this creates an FSB speed to memory speed ratio of 6:5. My system is running on a 270 FSB, but with my memory set to 166 MHz, my actual speed there is 225 MHz/450 DDR.

To compare, my memory bandwidth running on a 1:1 ratio (FSB and memory at 225 MHz) in Sandra 2004 was around 6100 mb/s. With my current settings, my score is around 6500 mb/s. I'm also quite confident my system can go higher, but I know my memory and cooling are holding me back.

[mustrum]

Ok i almost get it...(i am a lil retarded)..
1) Why do u have to set ur memory to 133 or 166 and what is the Default setting in bios?I undersand that if u raise FSB the memory goes up as well but why 133 or 166?what does that mean?
2)I'd try 2.5-3-3-8 on my ram or maybe 2.5-3-3-10/11 for more stability.--- i dont get that memory stuff at all

Thank you so much I understand 70 % of it..just need 30 more... :)
It's a divider. My HTT runs at 289x9. If i set the memory to 200 it will run at 289mhz. If i set it to 166 it runs at 245mhz. If is et it to 133 it runs at 192mhz.
It's very misleading and a bad solution. They should have called it memory divider or something like that.
The 133/166/200 setting are dividers and not the real memor frequencies. Those numbers are only correct if you have a HTT at stock 200mhz.

[Wingless]

It's a divider. My HTT runs at 289x9. If i set the memory to 200 it will run at 289mhz. If i set it to 166 it runs at 245mhz. If is et it to 133 it runs at 192mhz.
It's very misleading and a bad solution. They should have called it memory divider or something like that.
The 133/166/200 setting are dividers and not the real memor frequencies. Those numbers are only correct if you have a HTT at stock 200mhz.
ok i get that sruff..

--When you use memory dividers does that affect your performance?
--In your case Mustum Having your memory set to 200 you have 289 Mhz FSB does that mean your memory running at 289 mhz as well, instead of 400mhz(pc 3200)?
--When your system has PC DDr 500 ram and 200 fsb what does that mean? if they work in-sync?
Ok it is all good... now i can have a look at the Xtrym dividers charts..

[Akirhol]

Oi...

They are dividers... think of them as 200 = "100%", 166 = "83%", 133 = "66%" ... roughly. If you have your HTT set to 250, and you set your memory to "200", your memory will actually run at 250. Also, all these numbers are expressed in SDR, so "memory running at 289 mhz as well, instead of 400mhz(pc 3200)?" is pretty far off... 289 is 578MHz DDR.

The advantage of using a lower divider is that it lets you clock your CPU much higher than the memory w/o instability. You can have your CPU running at 250x10 for example, for 2500MHz, but run a 166 divider and have your memory running at ~207 [DDR414]. Good for if you have DDR400 rated RAM and can't get it to run at DDR500 stable.

If you have your chip set to 200MHz HTT, and you set your memory to 200MHz, your RAM will run at 200MHz [DDR400]. With DDR500, you can easily get your chip up to 250MHz HTT with 200 memory for a 1:1 ratio, running your memory at 250 [DDR500].

*Looks over post twice*
Seems about right... I've yet to get my A64 tho, so anyone feel free to correct me if I'm wrong. :P

EDIT: Also of note... as Saturn posted, running a higher HTT with a ratio that isn't 1:1 [in other words, running a lower memory divider] boosted the memory bandwidth of the system.

[mustrum]

ok i get that sruff..

--When you use memory dividers does that affect your performance?
--In your case Mustum Having your memory set to 200 you have 289 Mhz FSB does that mean your memory running at 289 mhz as well, instead of 400mhz(pc 3200)?
--When your system has PC DDr 500 ram and 200 fsb what does that mean? if they work in-sync?
Ok it is all good... now i can have a look at the Xtrym dividers charts..
That would be like that yes. MY memory can'tz handle 289 though.
Running my memory on the 133mhz divider wich boots at 192mhz then. That's a pretty low clock but i could set very tight timings wich the A64's love.
I am getting awesome gaming performance and great benchmarks as well so i would say memory clock isn't that important.
If i'd build a system from scratch i'd get some gskill TCCD chips to run it 1:1 though. I took over these cheap crucial 3200's from my old AXP rig though.