i7 PPD after the SMP adjustment?

VoraciousGorak

New member
I'm having trouble finding recent topics on this question in major forums... what sort of PPD does an 8-thread i7 get on SMP units these days on the low end and high end? Wondering if it's worth selling the majority of my Core 2 computers and older GPUs to buy a new i7 setup and stop my electric bills from going even more completely out of control. Maybe an i3 for the bedroom too
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On that note, what sort of PPD does a Sandy Bridge i3 do in the new SMP score levels, any idea?
 
My i7 2600k @ 4.5ghz gets around 25-35k ppd depending on the work unit

How many watts does that system pull from the wall? If you were to run that 24/7 365 how much do you think the annual cost in electric would be? Do you think atm that the i7 2600K gives the best watts to ppd ratio? Or are there any GPU based systems that provide better watts/ppd?

Just trying to get a feel as to what would be the best bang for buck (purely in folding terms) and best watts to ppd ratio.

TIA.
 
How many watts does that system pull from the wall? If you were to run that 24/7 365 how much do you think the annual cost in electric would be? Do you think atm that the i7 2600K gives the best watts to ppd ratio? Or are there any GPU based systems that provide better watts/ppd?

Just trying to get a feel as to what would be the best bang for buck (purely in folding terms) and best watts to ppd ratio.

TIA.

CPUs have been the best ppd/watt for a long time now. GPUs are great performers and can put out lots of points, but they also use a lot more electric.

The best ppd/watt systems are multi-cpu setups, namely an SR-2 with dual Xeon chips or a 4-way 12 core Magny-Cours setup from AMD (48 total cores). Of course, these systems have a much higher initial price than a single CPU or GPU, but once all is said and done nothing can beat these setups in terms of ppd/watt.

Here are some rough and conservative numbers to paint a picture: A 560 Ti uses 170 watts according to nVidia and will average let's say 15,000 ppd. That's 88ppd per watt. We'll disregard the rest of the system to make an even comparison to the CPU.

A 2600k @ 4.5ghz probably uses 120 watts or more. At 35,000ppd that's 292ppd per watt.

In contrast, my SR-2 can put out about 180,000 ppd with the right WU. I would guess at most the system uses 350-400 watts (2 80 Watt Xeon chips overclocked). That's 450ppd per watt.

Of course GPUs still have their place, they are probably the cheapest initial investment to start making a decent ppd right off the bat, and you can add 2 or 3 to a single rig. For me, it was worth the large upfront cost to have a setup that doesn't output much heat (living in Florida this was important).
 
@riotcity76 - thanks for that info. I've been comtemplating building a dedicated folding rig for a while, but don't really know were to start. Been looking at 460's on ebay, which seem to go for about £60-70 and output about 10k ppd. However I'm also very conscious about my electricity bill, and that while the 460 route might be good, they may not be the best choice for me. For me the worst thing that I could do would be to build a rig which chewed up the juice and produced a poor ppd total.

Here's hoping that I'll be making some contribution soon - no matter how small.
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Is it worth me starting another thread to continue with this? as I seem to have hijacked this one.
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Probably be best to start a new thread, that way people can post their PPD numbers here and it won't be so hard to find between posts.
 
It's good info regardless. I have a big farm set up right now, but when Ivy Bridge chips launch I plan on getting an i7-3770K or seeing if I can find people offloading their old 2600Ks for cheap-ish to replace my setup now. If those numbers are accurate, one overclocked 2600K could replace my two Core 2 Quads, my Core 2 Duo, and two video cards for an obvious power/heat savings.

For that matter, selling the old parts would also let me afford the new stuff...

Still, anyone Folding on an i3? How does the Hyperthreading help the dual core chip?
 
How many watts does that system pull from the wall? If you were to run that 24/7 365 how much do you think the annual cost in electric would be? Do you think atm that the i7 2600K gives the best watts to ppd ratio? Or are there any GPU based systems that provide better watts/ppd?

Just trying to get a feel as to what would be the best bang for buck (purely in folding terms) and best watts to ppd ratio.

TIA.

Assuming my system = 350w. Price per year 24/7 = £370/year And ~ 20 million points/year

= 54k/1 pound

So basically I pay ~ £1/day for 54k points

This calculation is based on 1kwh = 12p (how much I pay)
 
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