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Thread: One Loop Liquid Cooling. Is It Any GOOD ?

  1. #1
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    One Loop Liquid Cooling. Is It Any GOOD ?

    I was wondering if adding GPUs on a liquid cooled setup will hurt the temps too much.

    The Loop is cooling an overclocked 920 @ 4.5 GHz and Northbridge on a RIIE.
    I want to add a gtx295 to the loop using this block "Koolance VID-NX295 GeForce 295 GTX Full Card Liquid Cooling Block".

    The loop consists of:
    CPU Block: Heatkiller 3.0 All cupper version.
    Northbridge: Swiftech NBMAX.
    Pump: Swiftech mcp335.
    Radiator: Swiftech mcr320 w/ 3X120 Scythe 1600 RPM.
    Resevoir: EK multioption 250.

    res>pump>cpu>nb>rad>res

    Temps on the cpu= 36 (40 core Avg.) idle.

    any thoughts?
    Last edited by blaxtr3m3; 08-30-2009 at 03:24 AM.


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  2. #2
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    Temps will shoot up. I wouldn't do that.
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  3. #3
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    Nothing really to loose by trying. If temps are unacceptably high, try other alternatives.
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  4. #4
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    Works fine for me .
    Bloodrage x58 - w/c northbridge @ 1.28v
    I7 920 c0 @ 4.3 - 4.5ghz HT off @ 1.58v
    2 x gtx260 sp216 @ 750/1652/2390
    Magicool 360XT
    DD CPX-Pro

    Temps not a problem - linx doesnt load gfx so doesnt affect it too much. My highest temps I get by running 2 x linx 3072mb , 1 x prime 95 worker 1024mb each assigned to specific cores. Then furmark and superpi 32m on the final core. This is a far higher level of load than is feasible to achieve in normal use. Temps are cpu 87c , nb 37c, gfx 52c/54c. Left it overnight, those were max temps recorded over the whole session.

    Parallel flow on the gfx is essential. I'll post a pic up later when I get home.


    Last edited by PiLsY; 08-30-2009 at 10:13 AM. Reason: Pic added

  5. #5
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    Quote Originally Posted by PiLsY View Post
    Temps are cpu 87c , nb 37c, gfx 52c/54c. Left it overnight, those were max temps recorded over the whole session.
    what??? You have cpu temp 87c? That's hot.
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  6. #6
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    Quote Originally Posted by damtachoa View Post
    what??? You have cpu temp 87c? That's hot.
    Adding 1 GPU to the loop wont hurt it much. The 360 rad should dissipate alot of that heat before it hits your CPU block again.
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  7. #7
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    [QUOTE=PiLsY;3986429]Works fine for me .
    Bloodrage x58 - w/c northbridge @ 1.28v
    I7 920 c0 @ 4.3 - 4.5ghz HT off @ 1.58v
    QUOTE]

    That's alot of volts to be putting through the CPU, i didn't even run my E66 with volts like that
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  8. #8
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    Do you have room for another rad? If so, you can add the gtx295, and see if your temps are acceptable to you. If they aren't OK, add another rad.
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  9. #9
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    87c is only Linx - nothing else can get it anything like that. Prime gets to 81/78/75/73 when run in conjunction with furmark. Prime on its own does 72/69/66/64.

    I dont get cpu temp related crashes until it hits 94c.

    There's going to be an extra rad going in the front - I have a 240mm XT which will go in without much effort, or rev.1 360mm XT which will require much case cutting to fit. The 240mm wouldve been in already except OCUK cant tell 3/8" tube from 1/2" tube (and are STILL arguing with me over it - their whole XSPC tube range is a size smaller than advertised).

    I put gfx before cpu as the gfx gained the most from the coldest water. It was also the most efficient way to pipe it up so happy days. I didnt lose any cpu clock by having gfx and nb before it in the loop and only added 3 to 4c core temp. Parallel flow gfx is essential to make sure temps are even and flow isnt restricted by two gfx blocks in series. Won't be a problem for the OP ofcourse as he only has one block to contend with on that card.

    It'll work just fine and you should get better temps than me (one less gfx card VRM, better cpu block and better radiator). Id reccomend push pull on the radiator if possible. Makes a massive difference on a loaded loop.

  10. #10
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    Quote Originally Posted by genec57 View Post
    Nothing really to loose by trying. If temps are unacceptably high, try other alternatives.
    How come?

    Quote Originally Posted by zalbard View Post
    Temps will shoot up. I wouldn't do that.
    This is based on what?

    Quote Originally Posted by adam9977 View Post
    Do you have room for another rad? If so, you can add the gtx295, and see if your temps are acceptable to you. If they aren't OK, add another rad.
    I can't add another rad. but I can remove it and buy a 480 rad if I have to.

    Quote Originally Posted by PiLsY View Post
    87c is only Linx - nothing else can get it anything like that. Prime gets to 81/78/75/73 when run in conjunction with furmark. Prime on its own does 72/69/66/64.

    I dont get cpu temp related crashes until it hits 94c.

    There's going to be an extra rad going in the front - I have a 240mm XT which will go in without much effort, or rev.1 360mm XT which will require much case cutting to fit. The 240mm wouldve been in already except OCUK cant tell 3/8" tube from 1/2" tube (and are STILL arguing with me over it - their whole XSPC tube range is a size smaller than advertised).

    I put gfx before cpu as the gfx gained the most from the coldest water. It was also the most efficient way to pipe it up so happy days. I didnt lose any cpu clock by having gfx and nb before it in the loop and only added 3 to 4c core temp. Parallel flow gfx is essential to make sure temps are even and flow isnt restricted by two gfx blocks in series. Won't be a problem for the OP ofcourse as he only has one block to contend with on that card.

    It'll work just fine and you should get better temps than me (one less gfx card VRM, better cpu block and better radiator). Id reccomend push pull on the radiator if possible. Makes a massive difference on a loaded loop.
    What are your Idle temps ?
    also, normal cpu load temps for example gaming?


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  11. #11
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    Idle @ 4.5ghz / 1.58v is 42/40/38/35 with no power saving on at all in bios.

    @ 4.2ghz / 1.28v with C1e, eist etc etc all on idle is 32/31/31/28.

    Gaming wise @ 4.5ghz:
    3dmark vantage 1 run xtreme preset gpu max temp 46c cpu highest core 62c
    An hour of Left 4 dead @ 1920x1200 16xAF 16xAA gpu max 47c highest core 66c
    4 hours of Empire total war - gpu max 48c cpu highest core 70c.


    It really is only Linx that kills it .

  12. #12
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    Pilsy, please explain parallel flow on you gpu's for me so I understand how it works. If you could show my some kind of diagram of how the water flows threw each block that would be much appreciated.

  13. #13
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    Quote Originally Posted by PiLsY View Post
    Idle @ 4.5ghz / 1.58v is 42/40/38/35 with no power saving on at all in bios.

    @ 4.2ghz / 1.28v with C1e, eist etc etc all on idle is 32/31/31/28.

    Gaming wise @ 4.5ghz:
    3dmark vantage 1 run xtreme preset gpu max temp 46c cpu highest core 62c
    An hour of Left 4 dead @ 1920x1200 16xAF 16xAA gpu max 47c highest core 66c
    4 hours of Empire total war - gpu max 48c cpu highest core 70c.


    It really is only Linx that kills it .
    those r some gr8 temps m8


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  14. #14
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    Yeah in the real world I have no issues at all temp wise. Its just artificial stress testing that overloads it. The extra 240mm radiator is going to be temporarily added to the loop by the weekend hopefully. The tubing and stuff should be here wednesday. Havent got the time for a full rebuild to cut the case so itll just be side panel off and have it propped in the case front for now. Its a damn good fit though - 2mm clearance at the top!

  15. #15
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    correct me if im wrong but it looks like your cooling the gpu first then the northbrige then the cpu

    its better to go cpu\northbrige\gpu\radiator\pump\

    the other thing is i think you have the gpu cooling wrong take a look at this pic it might help

    http://mypcrig.com/imagefullscreen.p...197&pageid=243

    hope it helps but you will have allready done it by now i hope


    Quote Originally Posted by damtachoa View Post
    what??? You have cpu temp 87c? That's hot.

  16. #16
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    loop order doesn't matter. This has been disproved several times

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  17. #17
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    how can you say that he is getting all the heat fron 2xgpus and the northbrige
    befor it hits the cpu if cool water was hitting the cpu first the cpu will be a lot cooler

    Quote Originally Posted by ahmad View Post
    loop order doesn't matter. This has been disproved several times

  18. #18
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    Hi,

    People told you ''try it'', I fully agree with that because if temps are really too high for your personal use (consider that strees test are not representing a daily use of your rig!!), you can add a second radiator. It will depend on what you're doing with your rig, and during how many time ^^

    For 2 waterblocks, why using parallel loops? People gave me some very good arguments against parallel loops some time ago, if they are not totally splitted (no contact between both, separate pumps, reservoir etc...), like for example... mid and short term consequences if the waterblock in loop 1 and loop 2 don't have the same restriction to the flow.... If you go on a dual loop, probably safer and more performant to have 2 pumps, 2 rads. But why going on a dual loop with a single cpu, a single graphic card and a NB....


    For the pump, try to select models like 18W DDC or D5 vario, on a single loop with 3 waterblocks and a rad, both will fit, on a single loop with 2 rads and 3 wb you may consider a dual pump setup or a 18W DDC (MCP355, DDC 1+ Pro something depending on countries and oems..).

    IMO the GTX295 is not a very hot graphic card. My temps with GTX295 are lower than with my previous GTX285, and similar, maybe lower then compared with my HD5970. IMO the CPU will produce more heat than the graphic card into the loop excepti during gaming or GPU high loads. But during gaming... your CPU will not run @ 100% !! So..

    Finally what is the risk? You need to think about an ''emergency'' budget for buying another rad, some fans and some fittings, maybe a bit of tubing. Except if you have some issues to install a second radiator in your case our out of your case. You could also consider a 480 rad to replace the 360, but why loosing money, add a second rad if needed.

    I do recommend the EKWB FC GTX295 single PCB if you have a single PCB GTX295. The parallel configuration of this waterblock is really nice, easy to install, and not really restrictive, I have a 300L/h flow rate with 2x D5 pumps @ speed 4 (@ speed 5 I'm near 400L/h!! = 105 US gallon per hour, 1.75USG/mn...) with 2 of these FC blocks, a HK3.0 and a 480 + 360 rad.... I mean don't worry about parallel loop or flow rate (except if your NB waterblock is restrictive), and don't worry about temps because you can improve this with another rad into the loop.

    During stress test, CPU never exceed 78°C or something (4.2GHz Vcore 1,42 max), and GPU... OCed... OMG after some hours of OCCT and Furmark, maximum 55°C for GPU and same story for VRMs.... @ 25°C air intake temp, 38°C water temp, 38°C air output temp. Single loop....

    During gaming? CPU maximum @ 60°C (OCed) and GPU around 48°C ^^

    GTX295 single PCB (also the dual PCB) is very well engineered I mean temps are not high, also with the stock cooler its quiet good compared with other cards.
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  19. #19
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  20. #20
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    right .... didn't saw the date...
    WORKLOG >> Project : Scan_H2O_v1.C - Revision 3 - 01-09-2010

    Case : Silverstone TJ07S moddded (in progress) / Noctua NF-P14FLX
    MB/CPU/MEM : EVGA P55 FTW - Intel i7 860 - 4x 2GB Dominator GT PC16K C8 @ 1,65V
    Graphics : Quad SLI with 2x EVGA GTX295 Coop Ed
    Sound : RME HSDP9632 with balanced analog and digital output to my Hifi/HT system in another room (Console + Ozone4 x2 for signal processing)
    HDD/ODD : Intel X25M 80GB SSD - WD Velociraptor 300GB - WD Caviar Black 1TB - LG Bluray
    PSU : ENERMAX Revolution E85+ 1250W modded with Noctua NF-P14FLX fan
    KVM : Logitech G15 + G9 - Iiyama E2607WS
    OS : MS Windows 7 Pro 64bit / Home Premium 32bit

    Watercooling: 2x Laing D5 w/ EKWB Dual Top Acetal > Black Ice GT Stealth 240 + 2x Noctua NF-P12 > Watercool Heatkiller Rev 3.0 > 2x EKWB FC-GTX295 Mono Pcb Nickel/Plexi > HardwareLabs Black Ice SR-1 480mm + 4x Noctua NF-P12 > EKWB EK-Bay spin reservoir Acetal
    Watercooling misc:Tygon R3603 7/16'' ID 5/8'' OD / Danger Den Fat Boy G1/4 - 1/2 fittings with Koolance clamps, and Bistpower 45° & 90° adapters / Chilled Pc modding and mounting accessories
    Monitoring AquaComputer Aquaero: Aquaero Controller USB w/black front & plexi display / 2x Flow Sensor High Flow / 3x Inline G1/4 high flow temp sensor / 3x temp sensor aerial / Emergency power shutdown bridge

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