Thought I'd mention Anandtechs excellent 12 page artical on AMD's up and coming Opteron / Athlon 64 processors. It includes new details revealed by AMD and excellent pictures of 1-4 way Opterons and 2-way 1U Opteron servers. Enjoy !
man what is that, are those all athlon 64 boards, they only have 2 ram slots (exept for one asus) , are they all dual channel? 2ram slots seems a bit cheap or is this just because these are demo boards or something
I do beleive Aces or Tom did a article on the RAM slots or maybe even AMD said so. If I remeber correctly the CPU can only address two slots worth of memory. I could be mistaken but I am like 97% sure of this.
-Jeremy
<font color=blue>Just some advice from your friendly neighborhood blue man </font color=blue>
I recall reading something like that...Hammer can only address 2 sticks of non-ECC RAM or somethin. If it was ECC each CPU could address 4 sticks, I believe. Chances are, these early boards are designed for only non-ecc.
Mark-
<font color=blue>When all else fails, throw your computer out the window!!!</font color=blue>
And there were lots of information on AMD, to prove me that they are not feeling like "going down". The personel there seems to really be serious about success.
I find it ironic they even were so bold to claim that the SPEC bench results are a bit conservative!
However I liked the honest attitude that if HThreading picks up, they will support it. As I said several times, I would not be surprised if they did so.
Now Anandtech also claims there is no FSB, so the question will keep growing in ponderous times: How do you overclock a Hammer?!
nVidia's Personal Cinema 2 doesn't seem as attractive like the AIW though, its look and style, nothing to tout about. If they tried to really do their own card with a Ti4600, or soon the Geforce FX, all in one, it'd be one hefty but powerful investment for people who want the ultimate in multimedia.
PS: Amazingly, AMD's stocks this week rose over 2$, this is simply outstanding. They were weakening a lot lately, down to ~5$, now they hit 8$ and don't seem to be on the road to stop. The economy is recovering.
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*You can do anything you set your mind to man. -Eminem<P ID="edit"><FONT SIZE=-1><EM>Edited by Eden on 11/27/02 09:52 PM.</EM></FONT></P>
Now Anandtech also claims there is no FSB, so the question will keep growing in ponderous times: How do you overclock a Hammer?!
As far as I can tell, this is how hammer will overclock:
There are two factors in overclocking. The first is the memory and the other is the multiplier. The multiplier is set like any other mobo. Just keep raising it until your computer doesnt boot or gets unstable.
The memory factor is a little tricky. The Hypertransport bus has a theoretical limit of 800mhz. Realistically the only thing holding you back is the memory speed. If you have pc2700 - your at what, about 332mhz (166 DDR). THen thats as fast as you can set the HT bus(in bios). There is talk of setting "articificial bus speeds" so you dont fry your memory. If that works out - then you set the bus speed in bios based on your memory speed rating. So basically, you go into bios and set your HT bus speed to about 330 and let her rip.
In short - it would appear the only limiting factor in overclocking hammer is your memory. If you get uber memory then the only limiting factor is the chip itself.
Caveats: obviously the memory ya get depends on what AMD supports in their on-die controller. And of course, your results will vary by how good the CPU is.
edit: removed some stuff..
Benchmarks are like sex, everybody loves doing it, everybody thinks they are good at it.
I was going as traditional Athlon vs P4, 400MHZ gap between each to be tied.
So if CH 1.4 is 800MHZ apart of the 2.2, then add 600MHZ for CH to be 2GHZ, technically the 2.2 will have to add 600MHZ again to be 800MHZ gap apart and hence it takes a 2.2GHZ CH to compete the 3GHZ.
I never thought of CPU proportionality, as that would have made Athlon K7s be able to beat 1GHZ P3s, at 700MHZ, as in that the scaling is proportional and not continuous (you add one here, you add one there).
EDIT: And I seriously don't think a 4GHZ AthlonXP would beat a 6.28GHZ P4 in time, if you get where I'm going.
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*You can do anything you set your mind to man. -Eminem<P ID="edit"><FONT SIZE=-1><EM>Edited by Eden on 11/28/02 10:13 PM.</EM></FONT></P>
I doubt AMD will leave an "open ended" style memory controller. Most likely you will only be able to use a certain speed, like 333, or 266.......but not either or. You're saying throw ddr400 in there, and you're overclockin'......Don't think so. There will be no FSB, so there should be no adjustment in the BIOS, or by jumper. It will run at defaults.
In the current article AMD also specified that although you can use higher memory frequencies, the CPU needs to be optimized for them in order to give the best performance squeeze. So now a CPU is modular and optimizable for a memory speed.
It could be a good thing in a way, as you don't have to look at the limits of FSB and its high frequency signal problems.
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*You can do anything you set your mind to man. -Eminem
You're saying throw ddr400 in there, and you're overclockin'......Don't think so.
When then you would be wrong Im not sure what the default memory controller will be. But whatever that speed is plus whatever the chip can handle is really the only thing holding hammer back. Trust me, I know.
There is no telling what kind of "artificial" restrcitions retail boards will place on the fsb.
Benchmarks are like sex, everybody loves doing it, everybody thinks they are good at it.
It doesn't scale proportionally over large jumps that include many CPU changes like adding a larger L2 cache or adding HT, etc. But it does scale close to proportionally... if you remember when AMD started its model number system it would jump by 66 MHz and have a model number 100 higher than the previous one. That worked fairly well for a while.
I don't believe that the ClawHammer will scale exactly proportional to the P4, but I think that it will lean much more toward proportional scaling than linear scaling. and therefore a 2.0 GHz CH will be pretty close to a 3 GHz P4.
Quote :
And I seriously don't think a 4GHZ AthlonXP would beat a 6.28GHZ P4 in time, if you get where I'm going.
Agreed. But that is more to do with all the changes that will take place on both the CH and the P4 and is not evidence that using proportions to estimate comparitive performance can't be accurate.
man what is that, are those all athlon 64 boards, they only have 2 ram slots (exept for one asus) , are they all dual channel? 2ram slots seems a bit cheap or is this just because these are demo boards or something
2 ram slots does seem like a small number to me too just because I am used to seeing 4. But I have never used more than 2 slots anyway. I think that having 1 GB of RAM (2x512MB) is plenty for almost any home situation. If it isn't, it won't be too long before you can use 2 GB (2x1GB)
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