Opteron 875 & 275 Difference

[=[PULSAR]=]

Well with my growing interest in D2OL and my quest to build a super computer for it and maybe grab me a piece of pie :) I cant exactly seem to find the difference between the two series of chips anywhere on the web. Both dual core with same speed and cache but 875 is $1300 more :confused: Maybe I'm missing something really obvious but if you guys could really explain the difference I'd be greatful :)

Thanks,

=[PULSAR]= :kitten:

[IvanAndreevich]

275 can only work in dual CPU configurations. 875 is good up to 8 CPUs. You probably want the 275

[=[PULSAR]=]

Anything else? If thats the case yea def goin with a 275 :)

[IvanAndreevich]

Nope nothing else except the price tag

[mr_gibs]

too bad they don't make dual core 1xx series, they are alot cheaper and still the same chip

[IvanAndreevich]

They do and they are called A64 X2.

[VVJ]

I have already got a specification on AMD Opteron 880 processor =)

[=[PULSAR]=]

880's :slobber:

[VVJ]

There are three models now: 180, 280 and 880

[terrace215]

There are three models now: 180, 280 and 880

Hey, on the Sun/AMD roadmap from February, the Dual core 2.4GHz Opterons (i.e. the 180, 280, 880 you refer to) were shown as launching in Q106.

Do you think this has been moved up?

One thing that was much closer on that roadmap was 2.8GHz Single core Opterons (154, 254, 854), listed for Q305.

http://epscontest.com/presentations/05q1_amd_sun.htm?slide=20

[=[PULSAR]=]

Hey, on the Sun/AMD roadmap from February, the Dual core 2.4GHz Opterons (i.e. the 180, 280, 880 you refer to) were shown as launching in Q106.

Do you think this has been moved up?

One thing that was much closer on that roadmap was 2.8GHz Single core Opterons (154, 254, 854), listed for Q305.

http://epscontest.com/presentations/05q1_amd_sun.htm?slide=20

Thats what I read too Q106, 54 series are already out? Havent seen them

[s7e9h3n]

Someone correct me if I'm wrong:
The 2xx series of Opterons have 2 Hypertransport links - allowing for two way link with another processor.
The 8xx series of Opterons have 3 Hypertransport links - allowing for up it to connect with up to 7 additional procs.
Too bad you didn't catch me last month when I had these for sale. 264ES = 270, 266ES =275.
http://img249.echo.cx/img249/7931/dualopties2uy.jpg
BTW, if you're interested in running 8-way singles, PM me. ;)

[=[PULSAR]=]

Ohhh I saw the 270's but not the 275's for sale, how much did that pair end up goin for? As soon as I get settled and get my army enlistment bonus I'm shooting you a PM to see what goodies you have, you always have great stuff for good prices...you lucky beta tester :)

[terrace215]

Someone correct me if I'm wrong:
The 2xx series of Opterons have 2 Hypertransport links - allowing for two way link with another processor.
The 8xx series of Opterons have 3 Hypertransport links - allowing for up it to connect with up to 7 additional procs.


All Opterons have 3 HT links, but you need coherent links to attach processors, as opposed to linking to a chipset.

2xx parts have 1 coherent HT link, which does limit the number of CPUs to 2.

8xx parts have 3 coherent HT links, but the limit of 8 is not a direct function of this, since in theory once you have more than 1 coherent link per CPU, you can make an endless chain of them. Performance would not be ideal with more than 8 however, and there are probably other internal reasons for the limit of 8.

See here: http://www.amd.com/us-en/Processors/ProductInformation/0,,30_118_8796_9240,00.html

[s7e9h3n]

All Opterons have 3 HT links, but you need coherent links to attach processors, as opposed to linking to a chipset.

2xx parts have 1 coherent HT link, which does limit the number of CPUs to 2.

8xx parts have 3 coherent HT links, but the limit of 8 is not a direct function of this, since in theory once you have more than 1 coherent link per CPU, you can make an endless chain of them. Performance would not be ideal with more than 8 however, and there are probably other internal reasons for the limit of 8.

See here: http://www.amd.com/us-en/Processors/ProductInformation/0,,30_118_8796_9240,00.html
Obviously, Opterons aren't my forte :p: I stand corrected :slap: :toast:

[i found nemo]

i see the 6 on the first line, is that 1.5 mb of l2 cache???

[s7e9h3n]

i see the 6 on the first line, is that 1.5 mb of l2 cache???
6 = 2mb L2 Cache ;)

[i found nemo]

ahhhh me sees