LOL Opteron 148 vs fx-51

[ZombieJesus]

Newegg is charging $404 for an Opteron 148 and $745 for the athlon fx-51. Is it just me or are they asking if you wanna give them $341 more for exactly the same chip LOL.

 

[Corsairpro]

They are not the same CPU. Opteron 148 requires Registered ECC Ram while FX-51 requires Registered RAM (ECC optional).

 

[AWhackWhiteBoy]

so would one be able to slap a 148 opteron on any old 940 board and just pay the extra for the ECC ram? since there is no north bridge i'd imagine that would work fine?

 

[BlvdKing]

That will work just fine. I am pondering this idea myself except that socket 940 boards are expensive and the memory costs more as well. It's hard to justify the extra money over an A64 3200+ (754) espe ially with socket 939 just around the corner.

 

[Soulkeeper]

yeah just hold off if the prices scare you
yur not alone

 

[cjdomer04]

So... what is the difference between the FX-51, Opteron 148, and 64 3400+? Is it really just the socket and memory type? All of the other basic specs seem to be the same. Also, the Opteron and 3400+ are the exact same cost. Can anyone explain the differences?

 

[AWhackWhiteBoy]

the opteron/fx uses dual channel memory, the 3400 doesn't. this obviously effects memory performance big time and in turn processor performance too.

 

[cjdomer04]

Does this mean that a 148 Opteron should destroy a 3400+? Is the only downfall then the more expensive RAM since the motherboards are not that different in price? Why dont I see anyone with the 148 as their chip, but I see plenty with the FX-53 for double the price?

 

[BlvdKing]

From what I have read the 3400+ is very competitive with the FX-53 and FX-51 (Opteron 148). This is because although the 3400+ is using single channel memory, it does not have to use registered or ECC, which slows memory performance down a small amount.

 

[Duvie]

Have you ppl really looked at cost of ECC versus non ECC??? I have and it isn't so great as to trump the cost of the 341 dollars...Even throw in the more expensive 940 mobo and it still deosn't make up for the 341 dollar price difference...

 

[EarthwormJim]

Does an Opteron 148 have the FX name? I think not, I hope that answers your question.

:disgust: :disgust:

More seriously I think the differences are just the name, FX's may be hand selected for overclock-ability(?), and FX's aren't multiplier locked (aren't opterons though too?).

 

[ZombieJesus]

Yes the 3400 can match a fx51 in performance. But for a gig of top notch registered ecc mem from ocz with timings of 2-2-2-6 it is only $299 US. Non registered memory around the same timings is about $260. So going 940 costs 40$ more, mind you the 40 dollars does buy u a little extra, retaredly good stability. As for the motherboards you will pay around 20$ more for a 940 board. So in total you pay around 60$ US more to go with the opteron 148. On one hand u get slightly better memory performance and server quality stability, on the other u pay $60. If $60 isn't too big a problem the opteron 148 is a great deal. Also note the opteron 146HE at 2.0 ghz produces around half the heat of a regular 146 but will cost you about 100$ more. This may be of value to overclockers as it will probably be easy to crank up.

 

[hytek369]

Originally posted by: ZombieJesus
Yes the 3400 can match a fx51 in performance. But for a gig of top notch registered ecc mem from ocz with timings of 2-2-2-6 it is only $299 US. Non registered memory around the same timings is about $260. So going 940 costs 40$ more, mind you the 40 dollars does buy u a little extra, retaredly good stability. As for the motherboards you will pay around 20$ more for a 940 board. So in total you pay around 60$ US more to go with the opteron 148. On one hand u get slightly better memory performance and server quality stability, on the other u pay $60. If $60 isn't too big a problem the opteron 148 is a great deal. Also note the opteron 146HE at 2.0 ghz produces around half the heat of a regular 146 but will cost you about 100$ more. This may be of value to overclockers as it will probably be easy to crank up.

good analysis

 

[Corporate Thug]

so performance wise Opteron 148 = FX51????

 

[ZombieJesus]

Yes that is the case they are the same chip all they did was rename it, after all they can be selling server chips to desktop enthusiests now can they... at least not before renaming it to something fancy. The socket 939 will finally be different then the opterons when they release it.

 

[fsstrike]

I am confused. So, the Athlong 64 3400+ CANNOT use Dual Channel Ram but the Fx Can?

 

[AWhackWhiteBoy]

Originally posted by: fsstrike
I am confused. So, the Athlong 64 3400+ CANNOT use Dual Channel Ram but the Fx Can?

there is no such thing as dual channel ram. FX uses two ram sticks running together, non-fx and non-opteron just use one stick each by itself.

 

[ZombieJesus]

Exactly the cpu accesses RAM by using memory controllers. In the case of new amd chips these memory controllers are built into the cpu chip itself. The athlon 64 3400 and processors like it use a single 64 bit memory controller onboard. The fx-51 uses two 64 bit memory controllers.

 

[fsstrike]

what is the clock speed of the 51?

 

[SilverBack]

FX51 is 2200 Mhz but is no longer being made
FX53 is 2400 Mhz

Opteron and FX cpu's have a dual memory CONTROLLER onboard the A64 has a single.

 

[ZombieJesus]

I take it you are suggesting the Opterons and the FX series use a 128 bit dual channel memory controller. I disagree; it makes far more sense from a manufacturing standpoint to have two 64 bit components and to just omit the installation onto the die of one of the controllers during the fabrication of regular athlon 64 chips.

 

[SilverBack]

I'm not suggesting anything, I'm stating.
Operton series and FX chips use EXACTLY the same memory controller. Who said anything about 128 bit or 64 bit?
THe FX chips are just clocked higher, the ID of the chip is different, FX's won't run dually as in the single Opterons.

 

[ZombieJesus]

The 148 wont run in an SMP enviroment either. What I thought you ment when you said "Opteron and FX cpu's have a dual memory CONTROLLER" with the word controller being singular was that fx cpu's use a single 128 bit memory controller and I attempted to explain that the fx probably uses two 64 bit memory controllers.

 

[Zebo]

LOL You guys are living in the 90's $650 for a CPU and MOBO??? Ya that's a 'deal' alright for maybe 10% faster than a Pentium 4 at 250% more money. Or 15% faster than a Athlon XP for 300% more money. I'll continue laughing as I leave this thread and think about the overlcoking possiblities of the latter setups. And use the diff buy something meaningful like a X800 or 6800 video card. Edit and a raptor boot drive.

 

[Falloutboy]

Originally posted by: Zebo
LOL You guys are living in the 90's $650 for a CPU and MOBO??? Ya that's a 'deal' alright for maybe 10% faster than a Pentium 4 at 250% more money. Or 15% faster than a Athlon XP for 300% more money. I'll continue laughing as I leave this thread and think about the overlcoking possiblities of the latter setups. And use the diff buy something meaningful like a X800 or 6800 video card. Edit and a raptor boot drive.

agreed I'm more than happy with my $75 dollar 2.7ghz processor.....