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EK FC-88 GT/GTS (G92) Flow Rate Testing

post #1 of 18
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New rules do not allow 3rd Party Sponsored Testing or Reviews.
Edited by Martinm210 - 12/8/12 at 6:46pm
    
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post #2 of 18
so now that you got your temp stuff going on..

ek fc or dd ione?

i want to thank you man, your doing so much for our and other communities, i dont think you get enough praise. your flow estimator, does wonders.

thanks you

    
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post #3 of 18
Thread Starter 
Thanks!

But the EK is going back, so is the IONE to DD. I don't have an 8800GT, just a GTX and it has ramsinks epoxied in place. If anything I'll be buying another GTX, but they are expensive and SLI still isn't a perfect thing...

The EK has more fin/surface area over the GPU core, but the IONE is a solid block (No add on aluminum piece) and it's also a bead blasted finish which should help with heat transfer some.

I'm still a GPU only block guy myself although these full coverage blocks sure do look nice.
    
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post #4 of 18
yeah great work martin

we need to see some C/W's though otherwise these numbers a pretty useless. Still interesting though.

Couldn't you make a test GPU rig cheaply enough
post #5 of 18
Thread Starter 
If you've looked around at C/W's you'll see there is not a standard method for C/W testing.

Take a look at the C/W curve for the D-Tek Fuzion:

Fuzion


Apogee GT and GTX


Now determine a flow rate (back to that useless pressure drop data..), ok assume 1.5GPM.

C/W GTX @ 1.5GPM = .08c/w
C/W Fuzion @ 1.5GPM = .03c/w

Assume a 100watt E6600 heat load

GTX C = 8 degrees
Fuzion C = 3 degrees

Delta C should be 5C degrees right (Stock Fuzion would be 5C better than a GTX)?

Now take Niksub1's thermal testing results...


Does the stock fuzion beat the GTX by 5 degrees?....unfortunately not at all..

Now back to the Fuzion C/W, my E6600 should theoretically consume about 109watts with the overclock and vcore, I'm running so that 3 degrees should apply. But even with Coolaboraty Liquid pro when my water temperature is 26C, my T-case is 47C, and my coretemp is 51C. What happened? Assuming the c/w is t-case, 3 degrees is still far from the actual 21C delta I'm getting.

If you can make sense of what c/w as being published today really does for you or what the definition really is, I'd be very interested, I've looked it over many times and see that it's a lost cause. Thermal testing on the same test bed does provide comparative information, but it's not c/w and I don't have this video card so I can't.

The current c/w curves as I can see have absolutely no comparative value. It's plagued with questions like is it Tcase or coretemp?what thermal compound?what processor?bowed? And more than anything "What is it?"

I'm at a loss and have thought about a scientific repeatable method for a long time now. As fast as processors and GPUs continue to change at today's pace, the only thing I see valuable for thermal testing is a comparative thermal test on real products.Even comparative thermal test results like Nik's above are only really valuable for a C2D processor, you could have a very different result on todays quads, and another ranking on tomorrows processor....

The posted c/w curves are useless for anything but understanding how sensetive they are to flow rate. Pressure drop curves however can actually be used to calculate flow rate, I find that more usefull or at least something I can deal with mathematically.

I don't have an 8800GT, but I understand overclocking potential is influenced very little if at all by different water blocks. If that's correct, the remaining value is minimizing the impact to flow rate for a combined CPU/GPU loop.

I would consider pressure drop data very useful in that case..
    
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post #6 of 18
Quote:
Originally Posted by Martinm210 View Post
I don't have an 8800GT, but I understand overclocking potential is influenced very little if at all by different water blocks. If that's correct, the remaining value is minimizing the impact to flow rate for a combined CPU/GPU loop.

I would consider pressure drop data very useful in that case..
I agree, heat is really not the limiting factor when OC'ing my cards, it's lack of stock voltage, if I were going to WC them, I'd take the better flowing block...
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post #7 of 18
More goodies...Thanks for the testing......Yeah CW is as much a art as a science anyway and there really is no standard for it, I think we talked about that before...I worry more about my flow rate so it wont go laminar on me as much as published CW ratings, that and user experiences with it...
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post #8 of 18
Thread Starter 
Quote:
Originally Posted by Deezle98 View Post
I agree, heat is really not the limiting factor when OC'ing my cards, it's lack of stock voltage, if I were going to WC them, I'd take the better flowing block...
Thanks for confirming that, I've heard for a couple of GT owners that same thing.

Quote:
Originally Posted by ira-k View Post
More goodies...Thanks for the testing......Yeah CW is as much a art as a science anyway and there really is no standard for it, I think we talked about that before...I worry more about my flow rate so it wont go laminar on me as much as published CW ratings, that and user experiences with it...
Yeah, I've thought about building some sort of test block like Bill Adams did, and I might still do that, but anything fabricated is still just going to be a simulator. Yeah, we looked at it and I've talked with several folks.

Probably the only really use type of c/w data would be one specific to every processor out there, and that's just not realistic.

I don't know, it might be fun building some sort of simulator, but I'd build a CPU simulator first, it would be impossible to do for all the video card variations.
    
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post #9 of 18
Hmmm interesting. I've been considering some blocks for my G94's GTS's, I don't think 9800 GX2's will be worth the investment so I may need to watercool/voltmod my G92's for my 'needs' .

Can I bug you a bit about what program(s) you did for the graphs/benches? I'm going to be showing a range of wiring harness comparisons for lsx motor swaps into different platforms and could really use something like that.
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post #10 of 18
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Quote:
Originally Posted by Locked88 View Post
Hmmm interesting. I've been considering some blocks for my G94's GTS's, I don't think 9800 GX2's will be worth the investment so I may need to watercool/voltmod my G92's for my 'needs' .

Can I bug you a bit about what program(s) you did for the graphs/benches? I'm going to be showing a range of wiring harness comparisons for lsx motor swaps into different platforms and could really use something like that.
Sure, it's just microsoft excel. I bought the full 2007 Enterprise Office (full meal deal) on ebay a few weeks ago. It's a little expensive, but worth it. The new 2007 version has some nice new features for making charts look nice.
    
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