No, my bad, I should have only put up a six core as recommended. How about this one? http://www.ebay.com/itm/Dell-Precisi...YAAOSw3ydVmwCWOriginally Posted by Bryan
It's a bit more. Unless you think I can wait for a better price as there is not much of a selection on the x5675. Must be a popular cpu.
Not bad, but I'd be more inclined to go for the 5680 @ 3.33G and 48G HERE.The 5680 is 10% higher clock rate and for less than 20 bucks it would be a shame not to bite.
I know Z will disagree, but 1 of my machines has 48G and 2 only have 24G. There have only been a couple of times that I couldn't run 24 threads on a project. On those I had to drop all the way down to 20 threadsSo if the machine is a little pricey you might consider looking for one that has the higher speed processor and getting less memory. At a later date you could upgrade the memory .... for $188 bucks you can get 48G.
The memory configuration is kind of oddball. IIRC you get a choice of 24G or 48G but nothing in between. You can download the users manual and it shows the valid configurations. I don't think you can start w/ 24G and then add another 24G to bring it to 48.
With regards to price, I bought my 1st over a year ago and it was at about the same price. I don't think they fluctuate.
Anyone running dual X5680 or X5690s in a T5500/T7500 or Z600/Z800? What are your temps like and what mods did you do? I figure at 130 watts, those are little tougher to keep cool compared to the 95 watt x5675/x5670/x5650 cpus. On my dual x5675 system, I ditched the aluminum heatsink on the main board CPU and put this one in http://www.ebay.com/itm/171183521047 and strapped a 92mm case fan to it. Plus I mounted 2 92mm fans in the back to pull air out and pulled the front cover off and have a small floor fan forcing air through it. May sound like a lot, but room stays warm with 3 systems in there.
I've been meaning to do that since I got mine. I just picked up 3 @ $10 a pop with free shipping.
I can't see spending the extra $$$ on the 130 Watt X56xx cpus. They cost more on the front end, then use more electricity and create more heat. My x5670 outproduces my x5650 by about 5-10% on most CPU projects, using only a few more watts of power. I'd look for dual x5670 or x5675 in the "bang for buck" category.
Just remember, these are not enthusiast motherboards, so even if you have the case open with cold air blowing on the internals, the CPUs will typically not run all threads at their rated speed. But they are very stable and can run a high end GPU on the stock PSU.
I took some power usage measurements on my machines about a year ago... now where did I put those notes
Check this out, http://www.setiusa.us/showthread.php...l=1#post100568
t5500 with 2x 5650s, 36gb ram, and a 750 ti. I did pretty much what you did. Pulled the passive, added a 92mm fan and my temps are amazing now. Wish i did it immediately after purchasing, I will next time.
T5500 w/500GB drive $160 http://www.ebay.com/itm/171985608656
2nd CPU/memory riser $80 http://www.ebay.com/itm/331702355304
X5670 x2 $200 http://www.ebay.com/itm/311479761117
24Gb RAM $60 http://www.ebay.com/itm/161176438347
Upgraded heatsink and fan $20
$520
Those are all buy it now prices, but if you're patient, you can snag some bargains and build it cheaper.
This is called the specific energy, and this ratio should be compared between machines. Basically for the same period of time an energy reading should be taken divided by the number of tasks completed on the same frame period. The ratio should be kWh/tasks.
On the topic of power and heat. I think we all know that a haswell will get you far more credit per watt. But remember a watt is a watt in heat. Have a 100w haswell or westmere you're adding 100w of heat to the room.
If that room needs to be heated you've just reduced its need by 100w. I have no idea how cpuboss.com calculates the annual energy costs but a x5675 shows 83$/yr and the 5960x is 122$/yr. Obviously we would double the Xeon cause we're talking about two.
It'd cost you less than 2 dollars a month more to run the dual Xeon vs a 5690x. If we round up a lot and estimate the dual xeons cost about 24$ more annually it would take a few decades for the energy costs to add up to the capital costs.
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I definitely recommend adding two 80mm exhaust fans at the rear, as well as this module which provides a bit of intake air up at the 5.25" external bays:
http://www.ebay.com/itm/NEW-Dell-WH2...item280a8c1619
Edit: Thanks MindCrime, it's 80mm fans that fit at the lower rear of the case.
Last edited by FourOh; 11-09-15 at 05:24 PM.
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