Difference between 754 + 939 AMD?

[southrk]

Hoping one of you can answer this. Is there any difference between the 754 pin AMD 64 3000+ and the 939 pin AMD 64 3000+ other than about $30? Is it worth the extra $?

[theopetro]

going with the 939 pin will offer you better upgradeability in the future and there are some other benefits but im not too sure about them the 939 uses a 90nm core while the 754 uses a....different one? lol told ya im not too positive someone else will most likely elaborate on this

[kram 2.0]

There are a few differences outside of the price difference, among them being the ability to dual channel and AMD's future plans for the processor socket. Socket 939 boasts dual channeling capability and is the "future socket" which the microprocessor giant wants to continue for mainstream processors. Socket 754 is a valid budget option but lacks the above.

kram

[Tebone1]

Like the above have posted...............The 939 pin cpu is gonna be around for a while, They Run alot cooler than the 754 pin cpu and you can upgrade later on
The 754 is also good but what they have out now is it,but still a good upgrade if on a budget.

[Moose on the Loose]

socket 939 offers better chipsets on motherboards as well.

[ric449]

Originally Posted by Tebone1 They Run alot cooler than the 754 pin cpu

I don't know where you got that one from. If the same core is used, they run at the same temperature. And if you are talking about the 90nm CPU's, they don't run that much cooler. Look here:

http://www.sharkyextreme.com/hardwar...261_3453401__1

As you can see, using the 3500+ processor, comparing 90nm to 130nm, you get 8C cooler when idle, but only 4.5C cooler when at load.

But, I still recommend 939 for the upgradability reasons.

[Tebone1]

Originally Posted by ric449 I don't know where you got that one from. If the same core is used, they run at the same temperature. And if you are talking about the 90nm CPU's, they don't run that much cooler. Look here: http://www.sharkyextreme.com/hardwar...261_3453401__1 As you can see, using the 3500+ processor, comparing 90nm to 130nm, you get 8C cooler when idle, but only 4.5C cooler when at load. But, I still recommend 939 for the upgradability reasons.

Nice link ......I was just comparing my 939 to my friends 754, We both have the exact same case,fans,vidcard,and drives,and memory,the only diff is the Mb and cpu and he runs ideal@40c and load 47c and I run @ 28c ideal and 35c load

[ric449]

Do both your rooms have the exact same ambient temperature? Also, different BIOSes can give different readings, maybe yours or his is giving an inaccurate reading? Maybe he damaged the thermal pad? Maybe his case is pointing towards a wall? Maybe his case is cluttered with wires while you have better cable management? As you can see, way too many variables in play here.

[Tebone1]

Originally Posted by ric449 Do both your rooms have the exact same ambient temperature? Also, different BIOSes can give different readings, maybe yours or his is giving an inaccurate reading? Maybe he damaged the thermal pad? Maybe his case is pointing towards a wall? Maybe his case is cluttered with wires while you have better cable management? As you can see, way too many variables in play here.

True very true, I doudt we do have the same things in that way.......But the 939 uses less volts than the 754 = less heat.

[ric449]

Less volts doesn't always equal less heat. Would you be surprised if I told you Intel's Northwood processor uses 1.475V - 1.550V while the Prescott uses 1.25V - 1.40V? Prescott is well known to be a hot processor, yet it runs on lower voltages.

[Tebone1]

Originally Posted by ric449 Less volts doesn't always equal less heat. Would you be surprised if I told you Intel's Northwood processor uses 1.475V - 1.550V while the Prescott uses 1.25V - 1.40V? Prescott is well known to be a hot processor, yet it runs on lower voltages.

Really? I've never had an intel chip(and I'm not knocking them) so I would not know much about them

[ric449]

Well, let me fill you in. Actually, a very brief explanation, lets just say it is known around the world at the moment as the "space heater".

[TwoRails]

Originally Posted by Tebone1 Nice link ......I was just comparing my 939 to my friends 754, We both have the exact same case,fans,vidcard,and drives,and memory,the only diff is the Mb and cpu and he runs ideal@40c and load 47c and I run @ 28c ideal and 35c load

Yes, a nice link.

On the temp thing, just the differences in the manufacture of identical components can make a difference in temps. For example, I've had two identical builds on my bench, same everything (case, fans, CPU, mobo, memory, HD, OS, Probe version, etc...) but they varied by almost a 15°C difference.

[Tebone1]

Originally Posted by TwoRails Yes, a nice link. On the temp thing, just the differences in the manufacture of identical components can make a difference in temps. For example, I've had two identical builds on my bench, same everything (case, fans, CPU, mobo, memory, HD, OS, Probe version, etc...) but they varied by almost a 15°C difference.

Wow...Really? I've never done a side by side like that before and have built 4 pc's the past few day's with the same everything.I may have to check that out.

[TwoRails]

If I hadn't seen it with my own eyes, I'd have a hard time with that... but yes, really. One box ran 40 - 45°C and the other at 55 - 60°C (idle / load). Both were 1800+s on Asus A7V333 mobos.

[digitalfreedom64]

Skt 754 = non dual chanel, 130nanometer process
skt 939 = dual channel, 130 or 90 nm process.
90nm runs slightly cooler the 130 but to me it's not a big enough dif to pay the extra cash. As ric449 said, less volts doesn't always mean less heat(as in the case of Prescott pentiums), the problem there is the power leakage caused by the transitors being so small and the extended pipeline. I may be wrong in saying this part but i think the P4 northwoods run like 10 degrees hotter than northwoods. Well that's just an example.
As far as dual channel with Athlon 64s, it really makes no big difference because of the huge bandwidth of the processors.

[ric449]

939 aslso has a faster HT link, and I think it is the only socket in AMD's lineup apart from 940 that supports cool and quiet.

[digitalfreedom64]

Originally Posted by ric449 939 aslso has a faster HT link, and I think it is the only socket in AMD's lineup apart from 940 that supports cool and quiet.

Oh yes, I did forget to mention that didn't I, skt 754 has 1600mhz HT and 939 has a 2000mhz HT. I believe you are correct about the cool and quiet. As far as upgradability would be best to go with 939 but as i mentioned before I wouldn't put too much stock in the dual channel, won't make enough dif to matter. Then there's the fact that 754 is a budget line socket and the semprons will be taking it over.