Yep, just what I've been saying...The 965 chipset was designed for c2d and quads....kinda dangerous for others :DQuote:
Originally Posted by boshuter
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Yep, just what I've been saying...The 965 chipset was designed for c2d and quads....kinda dangerous for others :DQuote:
Originally Posted by boshuter
So are we just waiting on a seemingly more accurate load number to begin thinking up new designs and load testing schemes? The idea that our evaps could be much better sounds like a great thing to improve on.
I'm trying to give my silver evaps higher walls and lots more surface area but I need to change my casting rig to investment casting instead of sand casting for it. With investment casting I can make awesome evaps. I just need to find some good high temperature casting investment, unfortunatly that's not easy to find around here. :(
But wouldn't the most important place to use silver be at the base to interface with the cpu because of it's superior heat transfer qualities?Quote:
Originally Posted by SoddemFX
well I never thought about it because I like maze evaps better then spiral/stepper evaps but also at a price of 12+ euro's for a troy ounce you don't want to machine too much.Quote:
Originally Posted by SoddemFX
edit: a 3 cm high cylinder of 35mm diameter would cost 120-140 euro on raw material only
But if I understand you correctly, aren't you ending up with a copper evap with a silver insert, and the base that contacts the cpu would still be copper?Quote:
Originally Posted by SoddemFX
Ideas are a good thing!Quote:
Originally Posted by SoddemFX
Is there a lower temp brazing method than what is commonly used that could braze silver to copper? Or any other method of obtaining a hermetic seal between the two?
How about taking a copper evap design and machining it at the base to accept a silver 'coin' for the cpu interface, with refrig evaporating directly on the top of the 'coin', and the bottom directly against the cpu? The trick is to get a cpu/silver/refrig interface with no copper in between. The second trick is to get a hermetic seal between the circumfrence of the silver coin and the copper body. This would keep the cost down (small amount of silver used) and maximize heat transfer to the refrig. The copper body would supply additional mass, with the silver maximizing heat transfer from the cpu.
So there's an idea of my own!
I could cast it for you if you wanted it but I think the performance would be worse then a stepper made out of a solid chunk of copper.
@ harvshark: look at my signature ;) it already works good but for a quad it needs to be a little better I think. a coin doesn't do much good probably unless it has lots of surface area. a good evap imo is lots of surface area near the cpu and the piece that touches the cpu should be made out of 1 solid piece, it's all about removing the heat as fast as possible :D
For brazing silver I use special filler that melts around 500*C and contains around 70% silver. This is specially designed for brazing precious metals. It's not as easy as copper but having good filler helps a lot.
Now we're getting somewhere! Special brazing rods, eh?Quote:
Originally Posted by Unknown_road
I see what you and Soddem were talking about when I looked at the pics in your sig. Kinda like my idea with added fins on top of the coin.
Sooooo...does silver machine about the same as copper? If so, just about any current design could be converted to a silver core with the copper outer shell being used now, by using careful brazing techniques with the special brazing rods. (I realize I am probably vastly oversimplifying things). And with a bit of careful housekeeping, perhaps the machined silver scrap could be remelted and reused?
Just a few more ideas.
yup, these brazing rods are used by jewelers.
silver is very soft, it machines worse then copper because it deforms a bit.
I dont think the material is as much the concern as the evaporator design. There was very little increase in switching from copper to silver in the case of the Storm series.
While silver may seem like a great idea, I think you're forgetting one thing.....silver is an EXTREMELY expensive material to use. That's probably the reason why we don't see more people experimenting with it. Unknown Road is a brave soul :p:Quote:
Originally Posted by harvshark
I am aware of the cost, that's why I mentioned the possibility of recovering and remelting the machining scrap for reuse. This is all just constructive dreaming, but if it worked out AND gave a sufficient increase in performance, I am sure some folks would pay double the going rate for a silver evap.Quote:
Originally Posted by s7e9h3n
you will need at least 10 to 15 ounces troy to make and evap, and as it was said, 10 ounces is U$S140 IIRC
NOL is right also, it didn't do magic on the storm also.
@Soddem
If you are talking of the center column with, the @itor evap has it smaller so every disc has more surface than the rest of the steppers.Quote:
@itor style "squat" steppers work well, the distance to the upper plates is less giving less resistance with the same column width
I think we have to find a simple as possible solution, a silver evap it will be just for a few guys.
the main reason I use silver is because I can cast it (copper oxidises) and because it is casted I don't need expensive machinery and since I don't waste a lot of silver it's not that expensive at all.
I've got a foot of 1" diamter copper round on the way, though I have no milling tools, I'll be using a hacksaw to make a stepper or two with 2" of height and heavy surface area. Who knows but this may perform very well, or my arms will fall off.
Results coming soon from the build, its looking really good, right now its just idle testing till I get home, the accumulator looks sorta like Ron's at the moment, half ice. Lets see how 12 feet of .036" works :)
I should have a Q6700 in about a week so ill see what its like compared to my heatload. THen i think its time to build another cascade ;)
Worked out a graph so far, but its about to change as I just shortened the captube a good bit. Seems with proper subcooling 12 feet of .036 on a runmc evap at 230 watts of load the evap actually doesnt flood or let any liquid through so the superheats too high. Need a bit more capacity.
Pics? Temps? Gas[es]? :D :toast:Quote:
Originally Posted by n00b 0f l337
I missed that thread :P
Well afters many tests i am sure that the best conbination for many watt is NEK2150GK + Elevens evap. I use them for so long in my production line(Freeze Packs) and always i am satisfied with the results.
Who wants to try elevens evap and compare it with others?
Quote:
Originally Posted by Unseen
gray has most evaps, maybe he might take over johanns thread if he has time. Unseen how much does elevens evaps weigh.
6" from Compressor,Quote:
Where are you measuring subcooling?
If you can't hold 230W with 12' of 0.036" i think you have some other problem...
Tom
I was thinking the same, Its doing alot better with 10 feet, around -40C with 225 watts so far (vs -22C), and I'm still considering jumping back to .031.
Bout 160-165 and 0 at load of 225 watts. I'm considering thats the problem as well and that .036" is too unrestrictive for these systems, it was worth a shot though.