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What is the coolest and lowest power CPU u can buy??

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February 5, 2007 8:13:32 AM

What is the coolest and lowest power CPU u can buy for a HTPC ?? and wot is the lowest power and coolest motherboard u can buy (mini ATX)
February 5, 2007 10:40:09 AM

The best performer of all energy efficient CPUs is the Intel Core2 Duo Low Voltage L7400 1.5GHz 4MB L2.
I will recommend you the flowing Micro ATX mainboard: Intel DG965OT.
With this stuff you'll have the most energy efficient system.
February 5, 2007 11:22:21 AM

Quote:
What is the coolest and lowest power CPU u can buy for a HTPC ?? and wot is the lowest power and coolest motherboard u can buy (mini ATX)

A burnt up CPU :lol: 
The highest performance / power consumption goes to Core2 CPUs, and for the same core; the lower the frequency, the smaller power consumption. Also cache affects it, but usually, very low power consumption gives performance penalty.
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February 5, 2007 12:19:59 PM

Core 2 duo is a power hog compared to what VIA is offering. Usually they sell MB and Processor as a single package. Look up their Epia series.
February 5, 2007 1:20:26 PM

Quote:
Core 2 duo is a power hog compared to what VIA is offering. Usually they sell MB and Processor as a single package. Look up their Epia series.


I'm in full agreement. I did a little bit of research at one point, when i was considering a compact HTPC.

If you're hoping for HD and potentially a bit of gaming as well then i would suggest a Core2Duo and a graphics card with HDMI connectors (if only for simplicity).

If however you want the quiet, low power and extremely compact then have a browse round mini-itx.com/store. They have some interesting articles and projects listed on their website mini-itx.com, it's worth looking at for ideas.
February 5, 2007 2:29:50 PM

Quote:
Core 2 duo is a power hog compared to what VIA is offering. Usually they sell MB and Processor as a single package. Look up their Epia series.


I'm in full agreement. I did a little bit of research at one point, when i was considering a compact HTPC.

If you're hoping for HD and potentially a bit of gaming as well then i would suggest a Core2Duo and a graphics card with HDMI connectors (if only for simplicity).

If however you want the quiet, low power and extremely compact then have a browse round mini-itx.com/store. They have some interesting articles and projects listed on their website mini-itx.com, it's worth looking at for ideas.


You can also consider the X2 3600+ @65nm. It's rated at 65W but I would say it will idle more like 55W.
February 5, 2007 6:12:55 PM

Quote:
Core 2 duo is a power hog compared to what VIA is offering. Usually they sell MB and Processor as a single package. Look up their Epia series.
A little too much of a trade-off in power with VIA though. Their cpu's are about as powerful as a PII. :wink:
February 5, 2007 6:28:54 PM

Quote:
You can also consider the X2 3600+ @65nm. It's rated at 65W but I would say it will idle more like 55W.


Then the 90nm version would also have to idle at 55W also, since in the Brisbane tests, there isn't much differences at idle though a noticeable difference under load.
February 5, 2007 7:13:03 PM

Quote:
Core 2 duo is a power hog compared to what VIA is offering. Usually they sell MB and Processor as a single package. Look up their Epia series.
This is not true!
Core2 Duo Low Voltage L7400 1.5GHz/4MB L2/FSB 667MHz/15W TDP/0.9W deep sleep TDP
What is offering VIA is just pathetic compared to C2D. L7400 is at least 3 times faster than the best C7 for any singlethreaded software and at least 6 times faster for any multithreaded software. The TDP of C7 1.5GHz/1.8GHz/2.0GHz is 12W/15W/20W. In the worst case, the L7400 has at least 3 times better performance/watt factor than the best C7.
There is no better performance/watt CPU than C2D LV7400.
February 5, 2007 8:20:01 PM

The Merom-core C2D processor with a Mini-ATX Socket M/478/479 mobo (not the OLD socket 478) would be the most performance for the power and heat.
February 5, 2007 8:47:57 PM

I would get a 2MB allendale (e4300) and underclock it to something like 1Ghz @ 0.9v. It should beat the VIA by a large margin in terms of performance.
February 5, 2007 8:52:59 PM

Quote:
I would get a 2MB allendale (e4300) and underclock it to something like 1Ghz @ 0.9v. It should beat the VIA by a large margin in terms of performance.
If your mobo will undervolt that much. :wink:
February 5, 2007 11:26:46 PM

Quote:
Core 2 duo is a power hog compared to what VIA is offering. Usually they sell MB and Processor as a single package. Look up their Epia series.
A little too much of a trade-off in power with VIA though. Their cpu's are about as powerful as a PII. :wink:

While i agree that the performance of the VIA platform isn´t quite what it could be, the OP asked for the lowest possible power consumption and heat generation and i guess VIA is as good as it gets for the ordinary consumer.
February 5, 2007 11:28:42 PM

Quote:
Core 2 duo is a power hog compared to what VIA is offering. Usually they sell MB and Processor as a single package. Look up their Epia series.
This is not true!
Core2 Duo Low Voltage L7400 1.5GHz/4MB L2/FSB 667MHz/15W TDP/0.9W deep sleep TDP
What is offering VIA is just pathetic compared to C2D. L7400 is at least 3 times faster than the best C7 for any singlethreaded software and at least 6 times faster for any multithreaded software. The TDP of C7 1.5GHz/1.8GHz/2.0GHz is 12W/15W/20W. In the worst case, the L7400 has at least 3 times better performance/watt factor than the best C7.
There is no better performance/watt CPU than C2D LV7400.

You are missing the point. Performance/watt wasn´t asked. In a HTPC you don´t need great performance/watt. You need just-enough-performance/lowest-watt-possible. That´s quite different. In addition the VIA platform is quite cheap too.
February 8, 2007 2:04:32 PM

I can't wait to see how low the power consumption of the LV and mobile chips will go once the industry is working with high-K and metallic gates in about a year's time. For now, I'm using an old laptop for my HTPC (Centrino 1.3 GHz). It works just fine, but it's a little slow with the games and storage is limited to external drives/media server. I can hold out for another year or so on the current setup, but I've been eying the mini-itx store and VIA processors. Learning about these Low-Voltage Meroms is fantastic, since they'll come with considerably more power for video editing/gaming. Maybe in a year's time they'll be down to 10W.

So we've seen some data on the VIA and Intel low-power CPUs, but what about AMD? Do they have a low-voltage version of the Turion out there? I thought AMD was getting into embedded processors, but maybe I have low-power and embedded confused in my mind. What about other manufacturers?
September 23, 2008 6:21:21 AM

**** OK here are the real number for C7 1 Ghz fanless ***

- it's jetway <some-model> mini-itx CX700M chipset, with hdmi and TV-out
- hitachi 2.5" 120GB drive
- Edimax 54g wireless
- picoPSU 120W

I'm running Ubuntu based "freevo" to browse my media and watch it through s-video. When playing H.264 encoded DVD rip, the CPU usage is 50% and the whole system consume about **** 18 Watt ****.


So, it basically depends on what you want to do with the rig. If you just want to play some media files, I'm pretty satisfied with VIA processor. In fact, I'm considering to replace my conroe-L 420 based 4xSATA file-server(consumes 80W) with a VIA based system.
September 23, 2008 10:50:01 AM

Looking at the long-term prospects, power costs money, so how long will it be before the lower power X2 3800+ reaches the break-even point? If we go with a typical $.10 per kWHr, the X2 3800+ consumes 37W less at idle and 48W less at full load. If that seems like a lot of power initially, it actually only works out to $32-$42 per year, running both systems 24/7. That means you're looking at a minimum of four years to reach equivalence in price+power. What about the 920 versus 805 power costs? The difference there is even less in terms of power use, so even at full load you're looking at $16 per year, or seven years to reach the break-even point.

a b à CPUs
September 23, 2008 12:25:36 PM

I had to, sorry...

a c 111 à CPUs
a b V Motherboard
September 23, 2008 3:31:16 PM

Really sweet, but pricey ...
Will take everything from a 8-watt single core Athlon to 125-watt Phenom (not real sure I'd want to go there - :na:  ) - a downclocked Athlon X2 4850e is probably the sweet spot ...

J&W Minix 780G-SP128MB MINI-ITX AM2+ 780G: $171
http://www.jetwaycomputer.com/AMD4.html
http://www.ncixus.com/products/32760/MINIX780G-SP128MB/...


JetWay JNC62K AM2+/AM2 NVIDIA GeForce 8200 Mini ITX: $169
http://www.jetwaycomputer.com/AMD3.html
http://www.newegg.com/Product/Product.aspx?Item=N82E168...



Yup. Back from the dead
June 1, 2009 7:05:57 PM

What are the experiences on the graphics side?
Reading through the various forums (mythtv.org and linuxtv.org) nvidia (VPAU) seems to be the best option for hd video stream replay ( blu ray).

Would like to find a low power board with nvidia graphics , hdmi/vdi out + digital audio out.
Support for PCI riser card for 2 PCI slots for DVB-S tuners, sata for hard disk and sata/ide for blu ray player.

Any suggestions?

A C7 in combination with an nvidia would be great, but I have not come across a vendor making something like this.






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