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-   -   AMD64 vs Opteron (http://www.aoaforums.com/forum/amd-motherboards-and-cpus/34309-amd64-vs-opteron.html)

madcatmk3 4th December, 2005 06:44 PM

AMD64 vs Opteron
 
what the differnce of an AMD64 vs an AMD operton, this is just for curiosity.

madcatmk3 4th December, 2005 08:40 PM

I'm sure someone knows the difference don't make me beg. :(

Razorfish 4th December, 2005 08:48 PM

Depends which A64 your talking about; the new 939 opterons are San Diego and Venus Cores which feature 1MB of L2 cache and as far as i can tell the achitecture of the chips is the same as the San diego based A64, i would assume that the only differance is that the Opteron is better quality as its designed to be used in servers where reliablity is paramount. From what ive seen the opteron is a better overclocker than the San Diego and Venice Core A64s... some are hitting 3Ghz. Hope this helps.

cadaveca 4th December, 2005 08:49 PM

TDP is different.

Razorfish 4th December, 2005 08:57 PM

There you go, Daves the man on AMD CPUs direct your questions his way... :D

cloasters 4th December, 2005 09:00 PM

Looking at ~$400 AMD 64x2 as well as ~$400 Opteron CPU's, the 64x2 runs 200 Mhz faster than its Opteron sibling. However, the Opteron sports 2 1 Mb L2 caches-- instead of the 64x2's 2 512 Kb L2 caches.
Some folks say that larger L2 caches don't mean much. Personally, the dual core Opteron's 2 1Mb L2's sound better than the Athlon 64x2's dual 512 Kb's do.

cadaveca 4th December, 2005 09:10 PM

Depends on the given application whether 512kb or 1024kb L2 is better. I've noticed no difference in running either, performance wise, so it's probably down to less than 5%.

The 1024kb cores tend to go farther in mhz than the 512kb...even direct from AMD, the 512kb is 2.4ghz max, while the 1024kb is 2.8. maybe a leakage issue with the crossbar hidden in there...and why the 3.0ghz A64 isn't a likelyhood.

Here's a link for ya...

http://fab51.com/cpu/guide/cpu_guide-64-e.htm

Aedan 4th December, 2005 10:03 PM

From memory, Opterons are designed to be able to drive eight memory banks, whereas Athlon 64 chips are designed to be able to drive four memory banks. In current terms, that means that an Opteron can directly handle 16GiB of RAM, whereas the Athlon 64 is limited to 8GiB RAM, assuming that the Athlon 64 can succesfully drive 2GiB DIMMs.

gedon 4th December, 2005 11:04 PM

Athlon64 have Cool&Quiet, Opterons have Power Now
atm Power Now does not work on S939, but does CNQ work at 300MHz+ htt?

cloasters 5th December, 2005 03:59 AM

Oh, I'll need that 16 Gb capability when I build a dual-core Opteron machine next year. For Web crawling and running Word, you must have the power!

tiamat63 5th December, 2005 06:18 PM

Also, Opterons that are not 939 require ECC registered memory.
Mainly their purpose was for CAD, graphic design, servers..workstations etc.

Also, I know A64's handle four memory banks, but I thought there were some troubles with the memory controller acting up...or falling back to a 2t command line?---or is that just rumor?

cadaveca 5th December, 2005 06:20 PM

It's a board issue, apparantly. The DFI RDX200 runs four sticks 512mb @ 1t(only seen this with tccd so far tho)

madcatmk3 5th December, 2005 09:42 PM

thanks acctuly I might be building a PC for someone and I think I might go with an opteron.

kotch 7th December, 2005 02:59 AM

better act fast on the opterons. AMD is no longer shipping them to retailers. They will now only ship to server manufactures. There will be no fresh supply of them starting in 2006, so get them while you can!

I'm loving my 144. Awesome overclocker for $150 (running at a 40% OC on stock everything).

cadaveca 7th December, 2005 03:02 AM

bought a 148 today.

madcatmk3 7th December, 2005 10:15 PM

I'm going to attempt to convince my parents. I doubt they'll let me.

Rondog 7th December, 2005 11:33 PM

I think i'll be getting a 146 in a few weeks. :)

marsh.miguel 10th December, 2005 10:29 PM

i am trying to decide between an x2 3800+ or the opteron 146. what are the advantages of the two, and which one is better?? Im looking o overclock, and I do alot of gaming. Thanks!

-Mike

Mark Schieldrop 24th December, 2005 06:53 AM

Ordered a 148, it's in the mail. . . Hoping for 2.8 ghz.

Finetobe 12th January, 2006 09:37 PM

1 Attachment(s)
Just got my 148 2900 mhz at 1.55 vcore.
is oki.
3008 mhz at 1.65v but not stabel.


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