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I wouldn't say that. Don't underestimate the Opterons. ;)
An Athlon64 is basically an Opteron in a different socket, and they are running circles around the Intels right now (at least the P4s; Dothan shows promise, but Intel seems to have no plans of officially introducing it to the desktop market) in most tasks.
Xeons by far offer the best price/performance, though.
The thing you have to remember is Windows XP only supports 2 processors (As does NT and 2000)Quote:
Originally Posted by chipmonk010
So having dual core CPU's based off of the Northwood or Prescott chips will be a waist. I don't think 2003 server even supports 4 chips...
When Intel releases its dual core chips they will be based off of the P4M core. They require fewer watts to run and generate FAR less heat than the Northwoods and Prescotts...
Imagine how hot a dual core Prescott would be :( You would almost have to run it with water cooling.
The thing about the Opterons is they have Hyper Transport... the integrated memory controller on the chip makes up for the lack up HT. D2OL isn't optimized for HT... But it can take advantage of Hyper Transport tech.
On the dual Xeon rigs you need to run 4 agents to max out your CPU... on Opterons you will only need 2. This will cut the amount of system resources needed to run the Agents in HALF!!!!!! D2OL on the Xeons is a total hog! It's got to be using at least 260MB of RAM... and all the memory bandwidth being eaten up by 4 Agents has got to hurt!
It's a well known fact that AMD owns everyone when it comes to crunching. You need half the resources and 1/3 less cash.
So in a normal rig (Non server class) AMD is the cats meow...
In the dual CPU class... that's up in the air... I don't know what kind of performance the Opterons are capable of... And it's a fact that there just isn't the deals available for the Opterons like the Xeons... and there is still the fact that the Opterons would require 1/2 the system resources to run balls to the wall.
So it's interesting... IMO the resources needed to run the Opterons is a BIG plus! You eat up a good chuck of your Xeon cost savings by having to get extra RAM.
so windows only recagnizes dual xeons as 2 cpus even tho they have HT? they are just considered to have 2 virtual cpus because of how ht works? i ask because i thought windows saw dual xeons as four cpus so i assumed that dual cores w/ ht would be the same, unless u mean dual, dual core cpus lol (that would be awsome btw)Quote:
So having dual core CPU's based off of the Northwood or Prescott chips will be a waist. I don't think 2003 server even supports 4 chips...
pretty cool stuff, id like to see some dual opterons in action. sounds like they could probably blow xeons away. im sure someone around here will go xtreme n get a dual opteron rig one of these days :D
:toast:
Windows XP only supports two physical CPUs, but I don't think there's any limit to the number of logical CPUs you can use.
Correct... the dual core chips would be 2 physical and 2 logical... So maybe it would work... HmmmmmmQuote:
Originally Posted by fr0stedflakes
I mean dual Xeons are 2 physical and 2 logical and they work...
So all in all, OPTERON kicks XEON!!! :) The only thing I wonder now is if the Abit mobo for it will support good bios overclocking. If it does, I might actually get it over the summer, or somewhere this year. But, remember MAYBE.
What would be the advantages of using these Xeons over say a Amd 64 as a regular desktop machine?
windows xp pro:Quote:
Originally Posted by fr0stedflakes
2 physical, 2 logical.
:)
XP Pro will run four logical CPU's for two HT Xeons, you'll note that while XP Home is only listed for 1P operation, MS supports 2 logical (or more, in theory) CPU's so that your average Joe at Best Buy won't lose HT support on his Home-based P4 system ;) As far as I know, MS hasn't said if they will treat dual core CPU's as one or two physical CPU's, but there's no technical reason hindering them.
As for Opteron vs. Xeon - I'd suspect without HT dual Opterons would mop up, but how efficiently the Xeons process four instances and if that would make the total output higher, I wouldn't know without benches.
Price/performance there's no way Opterons could compete with these LV Xeons - they make fantastic budget computing farms, whatever the application. If cost and potentially higher D2OL performance w/ HT weren't factors I'd want the Opterons - run a 64bit OS, NUMA aware, with like 8GB of RAM :slobber:Quote:
Originally Posted by Jeff
Hmm, would this be article-worthy? :idea:Quote:
Originally Posted by fr0stedflakes
Guys... I've crunched AMD Durons, XPs, XP-ms, A64s and now these Xeons. Believe it or not A64s and XP-ms crunch D2OL at almost the same rate per MHz. :shrug: Different DC projects perform differently on each platform. Some LOVE Intel... Some LOVE AMD. D2OL is one that performs favorably with these Xeons(why else would I convert an AMD farm?). Even if a dual Opteron will produce ~320 candidates per day, why in God's name would you even think about buying 2 ~$700 processors unless you have extra disposible monies...
http://www.newegg.com/app/ViewProduc...103-428&depa=0
And as far as extra resources... 512Mb is the minimum for a Xeon cruncher with 4 instances of D2OL running and 1Gb is the minimum for a machine that you want to be your daily computer. That's not an extreme amount of memory by any standard. I see guys running 2Gb just for games. If you had 2Gb in one of these machines I don't even think it'd notice 4 instances of D2OL even running.
I guess my point is the Xeons ARE the best bang for buck in regards to money, production, and electrical usage. What more do you need when crunching I ask? :D
That is cool to know. If it works for you, great. More options are good to have.Quote:
Originally Posted by fr0stedflakes
I just realized there is another option, The TTGI. I use this 550 watt PSU in my MSI K8N Neo2/3500+ rig, and it has a pretty strong 12V rail - 30A. Just a real good overall PSU. Plus, I love the additional cooling; 14cm fan, yowza!
TTGIs are great, I wouldn't hesitate to use that in a dually. Just be careful, some of the older model TTGI/SuperFlowers were pretty weak on the +12v. I used to own a 450w unit with <20A on the +12v (18A or 19A, something like that). Was fine for an AthlonXP, but I doubt it would be up to dual overclocked Xeons. :)
Directron has good prices on TTGI/SuperFlower PSUs, and occasionally they'll run some pretty good deals on them.
I have one odd question, what orientation are your cpu fans in? Mine are coming straight out of the hsf ( vertical if you lay the case on its side) "sucking" off the heat. I read somewhere that the IWT's could be set in 3 different positions, I just went with what the PC_DL user guide said.
Has anyone tested the other configs?
Funny you should mention a 450w SuperFlower from Directron... I have one and it's rated at 18A on the +12v line. I just started testing it with a 2x3.0GHz Xeon setup this week and so far it's doing fine. The +12v rail is solid, the power supply isn't running hot, and my Xeons are running at the same speed they were when I used a beefier EPS supply. I'm going to keep letting it run as long as everything stays this way. :shrug:Quote:
Originally Posted by fr0stedflakes
I found the IWT liked to have air blowing on them instead... but a couple people at 2cpu.com say they get better results sucking the air off. I'd flip the fans around and see if that helps at all. For me it was 2c-3c difference.Quote:
Originally Posted by cjc_75
Thank you Jeff an excellent guide. I have two of these:-
sSpec Number
SL6VP
Processor Frequency
3.06 GHz CPUID String
0F29h
Package Type
604 pin PPGA Core Voltage
1.525
Bus Speed
533 MHz Thermal Guideline
85.0W
Core Stepping
D1 Thermal Spec
73°C
L2 Cache Size
512 KB Manufacturing Technology
0.13 micron
L2 Cache Speed
3.06 GHz Bus/Core Ratio
23
I am thinking about the Asus NCCH-DL motherboard and I have several questions:- Will the Tagan 480W be sufficient (28A 12v rail) ?
How overclockable are these processors without voltage mods?
Although t
These are the mppga type however I have the stock xeon coolers, should I add extra fans i.e. two per processor or Is it worth watercooling them?
I have just bought some Bh5 memory from ebay are tight timings good for this board.
Many thanks for any advice as I'm a newish to overclocking let alone xtreme overclocking :)
As long as the rails are solid, more power to ya! :up:Quote:
Originally Posted by Jeff
Would probably be acceptable if all you're running are the Xeons (i.e. no high-end video card, RAID arrays, etc.). But much more and you'd probably be about to the limit of what that power supply is designed for. Then again, you can run 25A through a +12v rated at 18A, just like you can run a processor rated for 1.6GHz at 3.2GHz. ;) It will usually create excess stress on the component, though, resulting in premature failure. But for a power supply, this could mean that it dies after 35k hours, and not 50k hours as per the manufacturer's MTBF. Not a big deal, as that's still a four year life span running 24/7. :toast:
... or it could fail next week. Are you feeling lucky? :p:
:lol: For a bit longer I do... I don't think I'll leave it this way for "35k hours". ;)Quote:
Originally Posted by fr0stedflakes
:toast:
Would this Psu work on these duallies?
http://www.ultraproducts.com/product...roducts_id=247
That would work/look great!!! :up:
I've been away from this part of the forums for few days and when I wander back I find such a great guide!!!
Excellent write.... :thumbsup: Makes me wanna sign up for couple of those matched Xeons you're talking about in other thread... :)
I'm building two new setups at the moment ( need to get Big_Deel off my back for a while :lol: ) but maybe I find some extra resources for Dual Xeon ;) I'll let you know, Jeff....
Build on, bro! There is more than Big Deel back there. Maybe a speck in the distance now, but, as they say, "Objects in rear view mirror my be bigger than they appear"
nudge, nudge!
bachus... Thems fighten woids! :D LET'S GET IT ON!!!!!Quote:
Originally Posted by serlv
ATTENTION JEFF! (and everyone else)
an easier and safer way of doing the vdim mod has been found!! if u look at jeffs pic of the vdim mod u will see 3 solder pads in a row. the one to the far right is where u measure the vdim voltage and the middle pad is directly connected to pin 6 of the vr!! so basically instead of having to solder to the tiny leg of the vr u can just sold a lead to the middle solder pad > to ur pot > to ground n be set! found this over at 2cpu.com and multiple people have tried it successfully! i will be doing it this way! :D
thread here
cheers hope this helps everyone out a bit!
:toast: