AMD Socket-AM2: Same Performance, Faster Memory, Lower Power
by Anand Lal Shimpi on May 23, 2006 12:14 PM EST- Posted in
- CPUs
Power Consumption
Given that AMD reduced power consumption a bit alongside the move to Socket-AM2, we wanted to see how the new chips compared to the latest CPUs AMD had sent us prior to the launch. So we pitted our last Socket-939 sample, the Athlon 64 FX-60, against the two new Socket-AM2 samples we just received: the Athlon 64 FX-62 and the X2 5000+. Remember that the FX-62 actually carries a 125W TDP rating, so it shouldn't be any cooler than previous CPUs, but the X2 5000+ is a new 89W part.
There are inevitably going to be power differences between the Socket-AM2 and Socket-939 motherboards we used, but unfortunately there was no way to isolate them from the comparison as we are measuring total system power consumption.
Under full load, the X2 5000+ does appear to be a bit cooler than the Socket-939 FX-60. We've seen in the past that the 1MB vs. 512KB of cache doesn't really result in any significant difference in power consumption, so it looks like the overall decrease in power consumption is because of the improvements in production AMD has implemented at Fab 30. It is worth noting that the Pentium Extreme Edition 965 consumes just as much power as the FX-62, thanks to its 65nm manufacturing process. Even so, we still can't wait for Intel to drive its power consumption levels even lower later this year.
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jmke - Wednesday, May 24, 2006 - link
here ya gohttp://www.digit-life.com/articles2/mainboard/ddr2...">http://www.digit-life.com/articles2/mainboard/ddr2...
Xenoid - Tuesday, May 23, 2006 - link
Ok so AM2 is AMD's offering for 2/4 06.The article title mentions same performance, faster memory, lower power. Wouldn't faster memory (in this case, ddr2) net a higher performance than what we're seeing here? Why is AMD bothering with DDR2 if it's not a significant improvement? If the power usage is so low, does this mean we can overclock a lot easier? I never understood the huge deal behind power usage on a cpu.
coldpower27 - Wednesday, May 24, 2006 - link
DDR production is slowing down, and DDR2 is continuing to mature, AMD does need to change to this memory type now, regardless if they like it or not.DDR2 also allows higher capacities, so you can probably reach 4x2Gb now as 2Gb modles are actually available on DDR2.
Considering DDR2 biggest advanatge bandwidth, is what AMD doesn't really need more fo right now, performance improvements will be negligible.
Furen - Wednesday, May 24, 2006 - link
Also, having all that extra bandwidth available allows AMD to throw quad-core on the same socket without much problem (maybe 1H07... whatever everyone says I doubt AMD will let Intel have the quad-core advantage for a year, I'd say we'll see very low volume quad-cores as close to Intel's Kentsfield/Cloverton as humanly possible). I know we've heard that AM3 is coming next year (from, who else?, The Inquirer) but considering that the DDR3 spec is not finalized quite yet and just how slowly AMD jumped into the DDR2 bandwagon I'd say we won't see it until 2008 at the earliest.Axloth - Wednesday, May 24, 2006 - link
I think there is also marketing side. There are lots of people "unaware" of ddr1-ddr2 comparison. And they probably think that ddr2 "must" be better than ddr1 because of that that "2". Like: ddr2 is upgrade or next generation of ddr1 so its gotta be much faster. Also, they might go for intel because intel uses ddr2 and amd only ddr1... And they think intel's better thanks to ddr2, disregarding cpu qualities of both amd and intel.pzkfwg - Tuesday, May 23, 2006 - link
If DDR2-800 barely beats DDR-400, I was wondering if the AM2 socket could actually be slower than 939 DDR-400 when using DDR2-667 !?! Knowing that a very large amount of people would buy cheaper AM2 system with DDR2-667, that would be ridiculous!mino - Wednesday, May 24, 2006 - link
YES and NO.Remember most people buy generic CL3 or CL2.5 DDR400. IMHO generic DDR2-666 should be ona par with that.
soydios - Tuesday, May 23, 2006 - link
So, the X2 4200+ will not run the memory at full speed. How safe would it be to overclock from 200x11=2200MHz DDR2-733 (2200/6=366x2=733) to 219x11=2200MHz DDR2-803 (2409/6=401.5x2=803) using OCZ DDR2-800 RAM and an Asus Xpress3200 motherboard?Furen - Wednesday, May 24, 2006 - link
I'd say that you can very likely get away with that overclock with pretty much every 4200+ as long as the motherboard allows you to do it.mino - Wednesday, May 24, 2006 - link
Safe as safe. At least from the point it won't blow up :)As for stability it all depends on the motherboard.