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Pre-modding questions

post #1 of 4
Thread Starter 
So I went to Best Buy and got 2 Rocketfish cases ($50 each) since I found out that they were on clearance. Now I can mod one with the ability to revert back to the original parts as needed.

So here are my PC components to fit in the case:
Q6600 CPU + D-Tek Fuzion Waterblock
DFI Bloodiron Motherboard
Geforce 8800GTS 512 Graphics (currently stock, possibly MCW60 soon)
Radiator made from Bonneville heatercore
MCP655 Pump
OCZ GameXStream PSU (700W)
Seagate 500GB 32MB buffer HDD
Philips DVD+/-RW
4GB Patriot 4-4-4-12 DDR800 ram

So as you can see my components can get very hot, especially since the CPU, memory, and graphics are overclocked to maximum stable speeds (CPU is not maxed yet, only running at 3.2GHz now). So here are my considerations for the mod:
Cut out a window for an acrylic panel on the side
Cut out fan holes at the top for the fans to mount my radiator to the top

But before I start, I want to ask a few questions about airflow:

1.) My quadcore is watercooled, so obviously it doesn't care about airflow inside the case, my graphics card will probably be watercooled later (I already bought the MCW60 block and ramsinks) but I'm concerned about putting it in the same loop as a quadcore that will be running at around 3.6 GHz later since the loop only has 1 radiator that seats 2 120mm fans. Is it alright to put them in the same loop? Should I buy an additional heatercore or maybe just a small 1-fan radiator? Should I build a new loop altogether? Keep in mind that I might voltmod my GFX to 1.3V (base is 1.15) and try to overclock the core to 900MHz

2.) I'll place the heatercore at the top of the case, but I'm not sure what would be better, blowing air in or out? I thought blowing it in would be best for cooling off the radiator since the air above the case is likely to be cooler than the one behind (where the PSU is dumping heat to), however I saw many threads about people blowing air out through the radiator at the top? Doesn't that send warm air from the case into the radiator? If I put my GFX and CPU into the same loop, I'd probably care more about the radiator than the other components on the motherboard, right?

3.) Speaking of other components, if any of you know the Bloodiron motherboard you probably know it's designed for overclocking yet has pretty weak heatsinks compared to other boards of the same quality. Since I'm upping my FSB, I should probably be concerned about providing enough airflow for my memory and the motherboard? I've touched my memory during operation, and despite its ramsinks it still gets rather warm, it's also overclocked to 1000MHz from 800 right now. Can I take air in through the top and exhaust it through the fan behind the case? I know that hot air rises so it might make it a bit problematic. Can I create a positive pressure case where all fans blow air in?

4.) I want a potentiometer on my case and planning to control 6 fans or so, I heard the cheap ones are rheostats that convert excess voltage into heat which gets dumped inside the case. I'm not sure how else one would dissipate of the voltage but apparently more exponsive potentiometers work differently. So do you guys have any advice on which potentiometer to buy? I can build a rheostat type myself, but if there is a better way of reducing voltage to the fan, I will buy the mroe expensive potentiometer. I also want one that can handle all 6 fans and hopefully deal with high-power fans (currently I'm using 80 cfm yate loons but might upgrade later)
post #2 of 4
1. With an OCd quad and a GTS that might get volt modded, with all that heat I doubt a 120.2 heatercore can handle it. But then again I don't know too much about heatercores. I don't think you have to re-do your loop but maybe replace the heatercore with a triple rad.

2. Its usually best to have your rad fans blowing in, that way you get the coolest air to the rad.

3. Yea you probably want to have the rear fan as an exhaust. If you have too much positive pressure you're going to have a real problem with dust.

4. I'm sorry man but are you seriously worried about heat from a fan controller? Really? No matter what fan controller you put in you rig I seriously doubt you would see any minute changes in temps. I'd say just get something like a Sunbeam fan controller. Since it handles 20 watts per channel you could put some more high power fans on it without any problems.
My Rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 @ 3.4 :( Asus Maximus II Formula evga 800GTS 640MB G Skill 2x2Gb DDR2-1066 
Hard DriveOSMonitorPower
WD SataII 250Gb XP Home Samsung 225BW 22in Corsair HX620 
Case
Lian Li G70B 
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My Rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 @ 3.4 :( Asus Maximus II Formula evga 800GTS 640MB G Skill 2x2Gb DDR2-1066 
Hard DriveOSMonitorPower
WD SataII 250Gb XP Home Samsung 225BW 22in Corsair HX620 
Case
Lian Li G70B 
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Reply
post #3 of 4
Thread Starter 
Thanks for the feedback. I'm considering putting an additional radiator in (for 1 120mm fan) since it's hard to fit in a second dual-120mm radiator inside the case. I attached a mockup of what I'm planning to do, feedback would be appreciated. The problem is that the case would still be a positive pressure case since the exchaust is only done through the PSU and back fan, yet aside from placing a fan at the 5.25 bays I see no solution to this, and that probbaly would not help my airflow much. Thanks.
post #4 of 4
I don't think you have a pressure problem. As long as there is a little ventilation and a fan or two acting as an exhaust you'll be fine. If you had all intake fans then you would have a problem. I'm working on a LL G70 currently and with a 120.3 rad on top I'm going to have 4 intake and 2 (including PSU) exhaust fans and I'm not worried too much about positive pressure.

If your not going to replace your heatercore with a triple rad then adding a rad should help a bit. There might be a way to get a second 120.2 rad/heatercore in there. If you remove your hard drive racks and move your HDDs to the 5 1/4in bays you might be able to mount a double rad where the HDD racks are now. It might be possible with a bit of modding but having two double rads/heatercores is a hell of a lot better.
My Rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 @ 3.4 :( Asus Maximus II Formula evga 800GTS 640MB G Skill 2x2Gb DDR2-1066 
Hard DriveOSMonitorPower
WD SataII 250Gb XP Home Samsung 225BW 22in Corsair HX620 
Case
Lian Li G70B 
  hide details  
Reply
My Rig
(13 items)
 
  
CPUMotherboardGraphicsRAM
Q6600 @ 3.4 :( Asus Maximus II Formula evga 800GTS 640MB G Skill 2x2Gb DDR2-1066 
Hard DriveOSMonitorPower
WD SataII 250Gb XP Home Samsung 225BW 22in Corsair HX620 
Case
Lian Li G70B 
  hide details  
Reply
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