Duel channel memory support with socket 754?

[LordTerrin]

I would like for someone to explain to me the techincal benefits of duel channel memory, and why it is better than single channel. I want to build myself a socket 754 a64 3000 with two 512mb sticks of OCZ 3500, but I don't see that any of the socket 754 motherboards support duel channel memory. Can someone help?

 

[Markfw]

Thats because socket 754 cpus have ONE memory controller. The FX-51 and FX-53, and Opteron series have DUAL memory controllers.

And I don't think cpu's fight each other or the motherboards anyway......

 

[Zebo]

no performance differerce if you buy a 754 clawhammer vs 939 newcastle about 3-5% slower in the newcastle 754 vs 939 newcastle.


Did that make any sense? Probaly not. Look here http://hardocp.com/article.html?art=NjI2

 

[LordTerrin]

Well, that clears things up. How exactly does duel channel memory work anyway?

I'm wondering also, with the socket 754, most of the motherboards I have been looking at that anandtech has reviewed include support for ddr speeds up to, but not surpassing 3200, yet I see memory on sale that is 3500 - 4200. Where are the boards that support these high speeds, and what exactly is the difference between pc3500 and pc3200?

 

[JackHawksmoor]

Faster RAM is just for if you overclock. No board officially supports anything over PC3200. Dual channel is just combining two seperate memory channels together to get (theoretically) double the performance). In the case of the Athlon 64 as an example, you've got three processors with pretty similar performance:

3400+ 2.2GHz, 1MB L2 Cache, single memory controller (socket 754)
3400+ 2.4GHz, 512KB L2 Cache, single memory controller (socket 754)
3500+ 2.2Ghz 512KB L2 Cache, dual memory controller (socket 939)

All three have pretty similar performance, and no one is absolutly superior to another. It's kind of a good example as to how dual channel combines with the amount of L2 cache and the clock speed to get similar levels of performance.

 

[Zebo]

I'm not sure on the technology as it's not important to me. Anand has covered the in's and outs of all the new fangled technophile stuff in various A64 CPU reviews...just makes my eyes glaze over..

What is important is overall perfromance, overclockablity and memory.


The best board right now are those based on the Nforce 3 250 chipset. They offer overclcoking the FSB/HTT to 300+mhz or 50% overlock of the bus and are very fast. The better chipset is the 250gb because of virus protection and gigbit ethernet.

Memory, best to just get the cheapest PC3200 as every single enthusiast board has a memory divider so you don't have to worry if your memory is running same speeds as the bus/HTT or overclock.

For example say you bought the $144 2800+ and the $90 epox EP-8KDA3J and some PC3200.

To overclcok you'd set for example HTT to 250, memsetting to 166 (which means 6:5 ratio)

now your chip is running at 2250 MHZ instead of 1800 and memory is 208 or about PC3300, well in spec/

 

[HeroOfPellinor]

Originally posted by: Zebo
I'm not sure on the technology as it's not important to me. Anand has covered the in's and outs of all the new fangled technophile stuff in various A64 CPU reviews...just makes my eyes glaze over..

What is important is overall perfromance, overclockablity and memory.


The best board right now are those based on the Nforce 3 250 chipset. They offer overclcoking the FSB/HTT to 300+mhz or 50% overlock of the bus and are very fast. The better chipset is the 250gb because of virus protection and gigbit ethernet.

Memory, best to just get the cheapest PC3200 as every single enthusiast board has a memory divider so you don't have to worry if your memory is running same speeds as the bus/HTT or overclock.

For example say you bought the $144 2800+ and the $90 epox EP-8KDA3J and some PC3200.

To overclcok you'd set for example HTT to 250, memsetting to 166 (which means 6:5 ratio)

now your chip is running at 2250 MHZ instead of 1800 and memory is 208 or about PC3300, well in spec/

I've always wondered. Does an asyncronous ratio hurt performance? I'm not sure ratios can technically be asyncronous, but you know what I mean...anything other than 1:1.

 

[Zebo]

Not really HOP because of the A64 architecture even at the 200 setting the memory is asyncronous.

better explination here see point 6

 

[SocrPlyr]

DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL

Look up the freakin definition of DUEL and you will find it has nothing to do with what you mean!!!!!!!!!

I am sick of seeing that stupid word...

Edit:
PS:
sorry i just hate that word

 

[LordTerrin]

Originally posted by: SocrPlyr
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL
DUAL

Look up the freakin definition of DUEL and you will find it has nothing to do with what you mean!!!!!!!!!

I am sick of seeing that stupid word...

Edit:
PS:
sorry i just hate that word

to be honest with you... I wrote that like... 15 minutes before I left work after 8 hours. I was tired ... I am a grammar and spelling freak myself, so I applaud you , I.. do have some other questions if that would be alright... What is the HTT? How do you overclock ram? what is the x:x (6:5) ratio that you speak of?

thx guys :-D

LT

 

[SocrPlyr]

bump for answers

 

[randomlinh]

what else needs to be answered? I thought all the replies hit the question on the head.... 754 ain't got dual channel