LiamG6 wrote:
sub'd
I have some requests for ultra,
#1, Is there any possibility of you going to micro pins? ie cut another set of channels perpendicular to the current ones for slightly better heat transfer. It's only a single block so I'd say the benefits of heat transfer outweigh the pressure drop created. Do you actually have the capability to do that with your equipment?
#2, Also interested in an alternate top that uses machining in the top to equally distribute the flow across the block with two central ports for inlet and outlet on opposite sides of block but not diagonally opposed as they are now. similar to this Swiftech Apogee XL top design.
http://i.imgur.com/ei6ljlJl.png Inlets located centrally, with a plenum chamber to spread flow across block so that all parts of block receive equal flow. Still not ideal but my OCD and aesthetics make me want a symmetrical block, but only if it can provide more equal flow than the current design.
Not sure if you still have those old simulations we ran on my chiller block design ultra, but that's basically what I'm talking about. with just simple small micro pins instead of diamond pin matrix, and only on single block, and no jet plate. (Maybe a jet plate is still required to restrict the flow slightly to give it time to spread across plenum chamber before flowing across pins.)
Also, what is the thickness of the cold plate ultra? have you tested a few different thickness'? say 6, 8, 10, 12mm cold plate? I'm curious to know the effects of it on sustained 100% CPU load with a thicker or thinner cold plate, I've always been a fan pf the thinner one but I just want to see the data on it.
Right so lets talk about slot V pins theory .. well just cos i feel like it. Slots have more surface area where as with pins you have less but a more turbulent block so less laminar effect ( laminar being bad)
The best thing about about pins is this allows for center firing block like the apogee. this results in the coldest water hitting the hottest part in a CPU block. It's also being forced down from above which is great.
In reality if i went to pins over slots the pins would need to be MUCH thicker because they would be to weak as they are now and break off, or of course they would need to be much shorter. Having less slots as you go to pins and/or having them shooter greats reduces the surface area and thus you're worse off. The other factor in going to pins is this GREATLY reduces the rigidity of the base which is a very important factor
it is possible to make pins instead of slots BUT the big problem is i can only silt copper 80mm wide so the current block is to long to turn 90 and fit.
Im not sure why you say the flow is un even? The flow is perfect across the block my block going to a center firing block would actually result in un even flow because the distance across the diagonal of a square is greater. This results i less flow in these areas.
I assume you mean there's a temperature gradient across my block because cold enters one side and hot leaves the other. This is true. The obvious solution was to go to slots with a central inlet. This is a significantly more complicated top design. The down side of going to a center in was that this then more than doubles the effective slots area. This then more than 1/2 the flow rate down each channel. 1/2ing the flow rate down the channels is very bad because the block is huge as it is. In the end in all my sims i could make a center firing block that would perform slightly better BUT only if people could achieve the theoretical flow rate from a 655 V if they could not due to rads piping blaha then the performance fell of greatly. In the end in a real world situation having the greater velocity down the slots was a better design.