i know that this question has been asked before so i know there are some ace watercoolers out there. i have a spare rad (for a 120mmfan) that i thought might make a difference if i added it to the loop.

at the moment i am using a heater core from a toyota which two 120mm fans fit on perfectly.this is the setup
Pump - Heatercore - Cpu - Gpu - Gpu - Pump

the pump is an ehiem 1048.would adding the single fan rad (black ice) between the Cpu and the first Gpu block make any difference at all?.
i have added a box (accessed through a hole cut in the floor of the case) which is bolted under the case so room is not an issue.any advice wuold be apprecated

1 last thing - does it matter if the barbs are at the top or at the bottom (upside down)

Are the fans on your heater core both on the same side or in airflow series?

Usually I'd just say, if you've got it you might as well use it, but if you have a dually you should be pretty well off. Furthermore, your flow rates are probably already at a trickle with a single 1048 so adding another rad may not be a good idea.

What are your components?

Quote: Originally Posted by lAnonymousl Are the fans on your heater core both on the same side or in airflow series? Usually I'd just say, if you've got it you might as well use it, but if you have a dually you should be pretty well off. Furthermore, your flow rates are probably already at a trickle with a single 1048 so adding another rad may not be a good idea. What are your components?

both fans are on the front of the rad (push) and all my blocks are "silverprop" with 1/2 inch barbs and clearflex 60 hose

Silverprop Fusion SL copper water block for VGA cards 1/2fitting x 2
Silverprop Evolution VE CPU WaterBlock (AMD K8), 1/2"fitting
EE90 heatercore

http://www.silverprop.com/watercooling.aspx#waterblocks

Your sig is outside of the size limits. It can be 150 pixels tall by 600 pixels wide.

Quote: Originally Posted by Cpt.Planet Your sig is outside of the size limits. It can be 150 pixels tall by 600 pixels wide.

sorry i thought i had it sized right

If you want you could just add it to see if it makes a differenece and if it does keep it on if not take it off.

ive been told that it realy doesnt matter where the radiator is bacause once the system is running for a bit the temperature equalizes.

and like Anon said if you put it in when your systems pressure is already being threatend it will only cause higher temps....if you either upgraded your pump or got another one then it would work just fine....but then if you get a second pump that is the same as yours, then you have to think about the extra heat that will be thrown into the loop by the second one....so upgrading to a single more powerfull pump would be the best answer....i think.

Right, the idea is to find the best tradeoff. Unfortunatly there isn't any technical data on the Silverprop water blocks so I can't even make an educated guess. A better pump would certainly help you, but that costs money and you'll be hard pressed to find a quieter pump than the Eheim 1048.

As Fahye suggested you'll just have to give it a go next time you F&B to see how it goes. May not be worth the effort, however, when you take into account the mounting, tubing routing, extra noise, etc...

thanks everyone.i think i will stick with the heatercore for now.its giving me a max load temp of 29c at stock while folding.i only asked because we are coming into summer and i didnt know if my temps would go up significantly to warrant a second rad.if my temps do go too high i will add the second rad and see how it runs,then post results

Quote: Originally Posted by lAnonymousl Right, the idea is to find the best tradeoff. Unfortunatly there isn't any technical data on the Silverprop water blocks so I can't even make an educated guess. A better pump would certainly help you, but that costs money and you'll be hard pressed to find a quieter pump than the Eheim 1048. As Fahye suggested you'll just have to give it a go next time you F&B to see how it goes. May not be worth the effort, however, when you take into account the mounting, tubing routing, extra noise, etc...

would it make a difference if i had the rad upside down with the barbs at the bottom instead of the top.just makes it easier for installation

Quote: Originally Posted by keepaf1 would it make a difference if i had the rad upside down with the barbs at the bottom instead of the top.just makes it easier for installation

No, there are lots of people mounting with the barbs down.

Quote: Originally Posted by marktastic No, there are lots of people mounting with the barbs down.

cooool.thanks dude

have finally got my rig up and running with the heatercore installed.am getting a load temp of 27c when folding@home.just a couple of question's (typical noobie).

would adding two more 120mm fans on the otherside (pull) of the heatercore make a difference?.i have two 120mm fans on the outside (push)

i dont know if i have enough flow as i have two 6600gt's with waterblocks but i couldnt find a 1/2 inch U to join them.so i am using two brass elbows joined with 1/2 inch hose.is there a way to measure the flow/pressure in the loop?.if anyone has idea's about how to join the two gpu blocks to get a better flow i would be very interested to hear them
at the moment the top card temp is 85c while the second card temp is 39c.something doesnt sound right.

it could be that i need a bigger (but just as quiet) pump than the ehiem 1048 that i have now ?
any help is much needed.

Adding a couple more fans will make a difference, probably not as much as you would think though. Adding a shroud is the best way to improve radiator performance without adding noise.

If one card is measuring that much more than the other, it's not the pump. Check your mount first, I'd guess the hot one is not flat and level with the core. If one isn't getting flow, neither would the other in a closed loop. However you mount and connect the blocks, make sure the tubing/fittings are not pulling the block out of true with the core. A lot of times making a big, ugly gentle loop with tubing attached to straight fittings is your best bet for flow. It's always best to avoid sharp turns such as elbows.

Finding a "just as quiet" pump would be difficult, about the only choice that comes to mind is the Eheim 12 volt pump. It offers better head than the 1048 at stock speeds, and can be set to a MUCH higher head rating using a jumper on the control panel, it wouldn't be very quiet anymore at that setting though.

Actual flow and pressure meters are expensive and would be detrimental in a cooling loop. Flow meters for computer use simply let you know water IS flowing, not at what rate.

Quote: Originally Posted by AntiM Adding a couple more fans will make a difference, probably not as much as you would think though. Adding a shroud is the best way to improve radiator performance without adding noise. If one card is measuring that much more than the other, it's not the pump. Check your mount first, I'd guess the hot one is not flat and level with the core. If one isn't getting flow, neither would the other in a closed loop. However you mount and connect the blocks, make sure the tubing/fittings are not pulling the block out of true with the core. A lot of times making a big, ugly gentle loop with tubing attached to straight fittings is your best bet for flow. It's always best to avoid sharp turns such as elbows. Finding a "just as quiet" pump would be difficult, about the only choice that comes to mind is the Eheim 12 volt pump. It offers better head than the 1048 at stock speeds, and can be set to a MUCH higher head rating using a jumper on the control panel, it wouldn't be very quiet anymore at that setting though. Actual flow and pressure meters are expensive and would be detrimental in a cooling loop. Flow meters for computer use simply let you know water IS flowing, not at what rate.

thanks "AntiM".
will check the mounts and add a shroud.i think my fans are too low in revs.they are very quiet (1200rpm at 21dbs puting out 48cfm).

Well, that's a huge improvement over 85 c. How are you reading temps? Onboard or probe? Onboard can be inconsistant from card to card, probe can differ because of placement.

But I would still suspect mounting as the culprit. VGA chips are notoriously NOT flat. Lapping the gpu is an option, but I hesitate to recommend it because of the risks involved. I generally use Ceramique on vga chips rather than AS5, it's thicker and fills large gaps better. Also using a sturdy back plate like DangerDen uses can improve contact.

Quote: Originally Posted by AntiM Well, that's a huge improvement over 85 c. How are you reading temps? Onboard or probe? Onboard can be inconsistant from card to card, probe can differ because of placement. But I would still suspect mounting as the culprit. VGA chips are notoriously NOT flat. Lapping the gpu is an option, but I hesitate to recommend it because of the risks involved. I generally use Ceramique on vga chips rather than AS5, it's thicker and fills large gaps better. Also using a sturdy back plate like DangerDen uses can improve contact.

i am using onboard (nvidia control panel) for the temps.i have a couple of probes that i will try to see if there is a difference.
i am using AS5 compound.
dont know anything about backplates.the block is held on by two screws.must find out more about this.
i will have another look at the mounting
thanks dude

Quote: Originally Posted by AntiM Well, that's a huge improvement over 85 c. How are you reading temps? Onboard or probe? Onboard can be inconsistant from card to card, probe can differ because of placement. But I would still suspect mounting as the culprit. VGA chips are notoriously NOT flat. Lapping the gpu is an option, but I hesitate to recommend it because of the risks involved. I generally use Ceramique on vga chips rather than AS5, it's thicker and fills large gaps better. Also using a sturdy back plate like DangerDen uses can improve contact.

could you give me more info on backing plates ?

Back plate:
http://www.techniz.co.uk/images/revi...4acetal/d7.JPG
Installed:
http://www.techniz.co.uk/images/revi...acetal/d11.JPG

Don't believe it's offered for cards lower than a 6800. I remember my old Maze3 WB on a 9800Pro (also 2-hole mounts) would actually bend the card if I overtightenedthe screws.