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Cooling Help with first watercooling system for i7 930 and GTX470 in a Corsair 800D

Discussion in 'Hardware' started by thadman, 15 Aug 2010.

  1. thadman

    thadman What's a Dremel?

    15 Aug 2010
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    I currently have a Gigabyte X58A-UD3R with an Intel i7 930 and a Corsair H50 cooler. These components are installed in a Corsair 800D case. I recently overclocked my processor to 4.2GHz, here are my system settings.

    CPU Vcore = 1.2875V (level 2 load line calibration)
    CPU clock drive = 800mV
    DRAM voltage = 1.680V
    QPI voltage = 1.375V
    base clock = 200MHz
    CPU frequency = 4200MHz (21x multiplier, turbo disabled, HT disabled)
    uncore frequency = 3200MHz (16x multiplier)
    RAM frequency = 1600MHz (8x multiplier)
    RAM timing = 8-8-8-24-2

    The BIOS is reporting that the DRAM voltage is 1.648V (although it is set to 1.680V), the CPU Vcore is 1.284V (although it is set to 1.2875), and the +12V rail is 12.365V.

    Although I feel comfortable with this overclock, I am not comfortable with the heat. I ran IntelBurnTestV2.50 for 2 hours and the CPU peaked at 83*C and averaged 78-80*C. This heat will significantly degrade the life of my CPU and needs to be dealt with. As a result, I'd like to explore watercooling.

    I currently have an EVGA GTX470. This thing gets HOT! It idles between 55-65*C and peaked at 93*C while running EVGA OC Scanner. However, it is currently being RMA'd. I'm going to try and upgrade it to the GTX470 Hydro Copper so I don't have to install an aftermarket GPU water block and void my warranty. I will be adding another GTX470 in the future.

    I have a Corsair 800D case and I absolutely love it. It is a dream to work with and I'd really prefer not to modify it.

    Would it be possible to use a single loop for OC'd i7 930, X58 chipset, and SLI'd GTX470s? I'm shooting for a 5*C temperature delta (Water Avg - Air In). I really think it would benefit from separate loops, but I'm not sure where I could place an additional radiator(s) without modifying the 800D. I'd also prefer not to use the Swiftech radbox. An external radiator would take away from the sleek look of the 800D.

    I've read about every review / guide on skinneelabs and the stickies on XtremeSystems forums about 5x, but I'm still not sure what would be the best WC components.


    Here is what I'm currently considering:

    CPU water block: Swiftech Apogee XT extreme

    I have heard that this water block is incompatible with some Gigabyte motherboards, specifically the EX58-UD3R. My motherboard (X58A-UD3R) is not mentioned on the incompatibility list, but I feel its layout might be quite close to the EX58-UD3R. Does anybody know if this water block will fit on my motherboard?

    NB water block: Swiftech MCW30

    Is this a good choice for a northbridge water block? I'd like to use all Swiftech water blocks if I can (uniformity in the design). The chipset gets extremely hot due to the poor air circulation properties in the 800D. When I had the i7 OC'd to 3.6GHz, the CPU reached ~55-60*C and the chipset reached ~60-65*C. This is too hot. I'd prefer if it were below 50*C at all times (specifically ~40-45*C).

    Pump: Swiftech MCP355

    Is this a good choice? I heard the Apogee XT extreme is a comparatively restrictive CPU block and believe the MCP355 may be better for these situations compared to the MCP655. Is this a fair assumption? Should I use multiple pumps? I heard these have reliability problems compared to the MCP655. Could anybody offer further insight on this?

    Pump Top / Reservoir: XSPC Acrylic Reservoir DDC Top

    Is this the best top? Where should I install this in my case? I'm absolutely anal when it comes to maintaining a clean case (the reason I purchased the Corsair 800D was for the cable management). Is this significantly better than bay reservoirs? Is there anyway to install bay reservoirs without removing the drive covers?

    Radiator: XSPC RX360 (with 3x push Gentle Typhoon AP-15s) or Black Ice GTX 360 (with 3x push or 6x push / pull Scythe Ultra Kaze 3000s)

    I live in a small apartment without central air. My room is ~100 square feet. I'm going to be purchasing a window mounted AC unit in the near future. I'm not sure how loud the AC unit is, but it will set the noise floor for my room. I also have two large fans operating in my room. I don't seem to mind them on high, but I'm also not sure how loud they are or how they compare to PC fans.

    Are the Scythe Gentle Typhoon AP-15s the best fans for a low-medium flow radiator?

    Are the Scythe Ultra Kaze 3000s the best fans for a high flow radiator?

    I will of course be using a fan controller, but I'm not sure which one to get. Could anybody recommend a fan controller? How bad are the Scythe Ultra Kaze 3000s with a fan controller? Are they tolerable?

    My Corsair 800D can fit a triple 120mm radiator at the top of the case. I can't decide between the XSPC RX360 and HWlabs GTX 360. I believe it will ultimately depend on the heat dissipation requirements of my system.

    I used the CPU OC power calculator to determine power dissipation.


    At 4.4GHz (stock core voltage = 1.175V, OC'd core voltage = 1.3V), I'm getting 250 watts. However, I'm not sure how accurate that is.

    The bit-tech review of the i7 930 shows it loves power (more than that calculator is suggesting)

    i7 930 @ stock / idle = 124 watts

    i7 930 @ OC (4.3GHz) / idle = 176 watts

    i7 930 @ stock / load = 216 watts

    i7 930 @ OC (4.3GHz) / load = 396 watts


    Are these numbers referring to system power or CPU power? What numbers should I go by?

    I'm not sure how to determine the power dissipation of my GTX470. The [H]ardOCP review of the GTX470 shows the system pulling ~430 watts from the wall.


    The PSU used in the review was the Thermaltake Toughpower 1200W PSU, which is 87% efficient. We might assume that system (GPU + other components) was receiving ~375 watts from the wall. I'm not sure how many of those 375 watts are being dissipated in the GTX470 compared to the other system components. Could anybody offer further insight on this?

    Any thoughts on how to estimate the power dissipation of two GTX470s in SLI?

    I have absolutely no idea how to estimate the power dissipation of the chipset.

    I believe I must also take into consideration the heat dump associated with the pump I decide to use.

    Of particular consideration is how we apply these estimates. We might simply sum the power dissipation of all the system components in the loop at 100% load and use that to determine the required radiator and fans. However, I'm not sure if this is representative of the real world. I believe all system components at 100% load is seldom observed.

    I'm using this system for moderate gaming (Crysis), intensive multiphysics simulations (ANSYS, Cosmol, etc), Matlab, C programming, and miscellaneous engineering software. I'm currently using a Dell U2410 (1920x1200) as my primary monitor, so we might assume the system is going to be GPU limited (GPU @ 100%, CPU @ ?%) running games. Most simulation programs use the CPU for calculations, so we might assume the system is going to be CPU limited (CPU @ 100%, GPU @ ?%) in those application. However, once I familiarize myself with CUDA programming, I'll be using the GPUs for multiphysics simulations. I assume the system would be GPU limited in that application, but I am not sure of how significant the load on the CPU would be.

    I will be adding two more monitors (considering the Dell U2311Hs) in the near future. I'm currently running two monitors. I'm not sure how that will effect the GPU load with traditionally CPU limited programs. I don't assume it will be a problem, but I'd like to cover everything.

    With all of this in mind, how can we estimate system power dissipation in real world applications? I enjoy pushing my system as far as I can (within reason) using benchmark software (Prime95, IntelBurnTestV2.50, etc) to see what I can achieve, but its not THAT important.

    A RX360 with 3x Yate Loon D12SH12 fans @ 1815RPM will dissipate ~280 watts before exceeding a 5*C temperature delta (this is what I'm designing for). It will dissipate ~580 watts before exceeding a 10*C temperature delta. I assume the performance of the Scythe GT AP-15s on this radiator is similar to the Yate Loon D12SH12s. Is this a fair assumption?


    A GTX 360 with 3x Scythe Ultra Kaze 3000 fans @ 2804RPM will dissipate ~580 watts before exceeding a 5*C temperature delta. It will dissipate ~800 watts before exceeding a 7*C temperature delta (empirical data does not exist beyond 800 watts) I'm not sure how much this will increase by adding 3 more fans and operating them push / pull. Any thoughts?


    I don't think there is room for push / pull 38mm fans AND shrouds in the top of my 800D.

    Do you think the RX360 would be sufficient for an OC'd i7 930, X58 chipset, and SLI GTX470s in a single loop?

    I could probably install an additional 140mm radiator on the internal rear of the case (where Corsair recommends the H50 to be installed). Here is a photo (not my system, but it illustrates the idea).


    However, I'm not sure if it will interfere with the airflow to the 360mm radiator at the top of the case. There is about 4.8 inches from the top of the 800D to where the H50 is currently installed and roughly the same (maybe a little bit more) to my DDR3 modules.

    I dont't think I could install an additional 140mm radiator if I used the GTX360 with push / pull 38mm fans.

    There are 3 140mm radiators available on frozenCPU that might work.

    -Black Ice GTX 140

    -Black Ice SR1 140 (low air flow optimized)

    I haven't seen any scientific reviews (like the ones on liquidlab) of either of those radiators, but I assume their performance should be similar to their bigger brothers.

    -Koolance 140mm High Flow Radiator (30FPI)

    This is probably very similar to its bigger brother as well (requires 1800+RPM fans)

    If I went with a 360mm radiator and a 140mm radiator, should I put them in series or in separate loops? How would you distribute the system components amongst the radiators and how would you setup the loop order?

    I read the review of the quick disconnects on liquidlabs. The Koolance VL3Ns look nice. However, I'd like to hear members experience using quick disconnects. Are they worth it? Have you ever had the liquid left in the disconnect spill and damage part of your system?

    I'm sure I'm forgetting a lot of stuff. Please suggest something if you feel it should be considered.

  2. GoodBytes

    GoodBytes How many wifi's does it have?

    20 Jan 2007
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    Last edited: 15 Aug 2010
  3. Ph4ZeD

    Ph4ZeD What's a Dremel?

    22 Jul 2009
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    Information for the OP: running your CPU at 80c does not "significantly degrade" it's lifespan, especially as 95% of the time you won't be pushing the CPU at 100%. Excessive voltages will however degrade the lifespan.
  4. dazedandconfused

    dazedandconfused generic babble ->

    26 Jun 2009
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    Well as you can see from my sig a run a 920 and an rx360 in an 800d, my fans are gentle typhones 1450rpm (i think thats the rpm). Theyre on a fan controller a NesteQ fan max. Ive got a better pump than you suggest in your post and an extra rad, BUT i am cooling 2 5870s in the same loop.

    My 920 runs at 3.8ghz, my current room temp is 28.4c according to my temp sensor (no idea if thats accurate or not, but it is fairly hot in here) and my cpu is hovering about 60c whilst folding smp + the graphics cards (see why my rooms hot?).

    I thought most waterblock chipset blocks were for show and didnt do much for temps over the 'standard' bit of copper, but expect someone can expand on that better than I.

    In regards to the fan at the back. If you use the rx360 you might struggle to fit it in. I have my rx mounted so the barbs are at the back of the case and there is very little clearance so I would advise against that idea unless you mount the 360 the other way round (which I can't do, because I have a bay res).

    Thats my input on this apart from to say that goodbytes and Ph4zed are right about the cpu voltage and RAM voltage.
  5. brave758

    brave758 Minimodder

    16 Apr 2009
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    Hey mate here's my setup just for the CPU

    Block = apogee XT
    pump = mcp 655
    rad = P.A 120.3 with high flow low speed fans
    gone for 1/2" barbs and and 7/16 ID tubing
  6. brave758

    brave758 Minimodder

    16 Apr 2009
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  7. Sh0cKeR

    Sh0cKeR a=2(s-ut)/t²

    21 Aug 2009
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    I recent built a core i7 920 and an HD 5970 into the 800D with watercooling. In my build, I put a XSPC RX360 radiator in the roof, a Black Ice SR-1 120mm radiator on the back fan, and a Black Ice SR-1 140mm radiator in the bottom near the PSU. Combined with the Laing D5 and 1/2"ID tubing, I'm getting very low temperatures with the fans only spinning at 900rpm. For instance, my GPU idles at just 25c and hits 32c in Furmark.

    For your loop, you should run the same series radiator setup, as SLI GTX 470s will dump alot of heat into the water. I would then pick up two EK FC 470 blocks, an EK Supreme HF block, and a Laing D5 in combination with 1/2" tubing.

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