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Stren's 2012 CPU Water Block Roundup - Page 41  

Poll Results: Which block will win?

Poll expired: Sep 16, 2012  
  • 1% (3)
    Alphacool NexXxos XP3
  • 0% (2)
    Bitspower Summit HF
  • 1% (5)
    Danger Den M6
  • 2% (6)
    DT 5Noz
  • 7% (20)
    DT Sniper
  • 10% (26)
    EK Supreme HF Rev 4 (Full Nickel)
  • 17% (46)
    EK Supremacy (Nicekl/Plexi)
  • 8% (22)
    Koolance CPU-370 Rev 1.1
  • 1% (5)
    MIPS IceForce HF
  • 11% (29)
    Swiftech Apogee HD
  • 0% (1)
    Phobya UC1-LT
  • 6% (16)
    Watercool Heatkiller 3.0
  • 1% (3)
    XSPC Rasa
  • 13% (35)
    XSPC Raystorm
  • 14% (37)
    XSPC Raystorm Full Copper
256 Total Votes  
post #401 of 603
Quote:
Originally Posted by rrrhal View Post

I did it in Open Office but I would think MS Office would be pretty similar:
Make a sheet with 4 columns
  • Name of the Block
  • Average Temp - 1.96 * Standard Deviation
  • 1.96 * Standard Deviation
  • 1.96 * Standard Deviation
For instance I had a row that looked like this:
Code:
DT Sniper    41.08   0.57    0.57
Then select the whole mess and make a stacked bar chart

I think you forgot to include the sample size when calculating the confidence intervals. Confidence intervals are calculated from the standard error. The formula is
Code:
X +- 1.96*s / sqrt(n)
where n is the sample size, X the sample mean, and s the sample standard deviation.
The row should be
Code:
DT Sniper 41.40  0.25 0.25
Note: I am ignoring the fact that 5 is a very small sample size (statistically speaking) and thus should probably use the t-distribution, so we should preferably use 2.77 instead of 1.96.
 
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post #402 of 603
Quote:
Originally Posted by opt33 View Post

I understand your skepticism, I am looking at it and have a hard time believing it,....but I will post some internal pics, you really have to see it to believe it.
I outlined the missing threads from arrow to dots then arrow. If threads were here at same depth all around, there will be restricted flow.
looking forward to seeing what yours looks like ugotd8. If your is different, then mine is unexplainable.
EDIT: the only way I could fathom it being a defect is if a large portion of the acetal wall is missing at threads. Hole cant be punched any more towards periphery. And if large portion is missing, and threads go all the way down, water is going to make it through a slit between bottom of threads and block.
well, wait on pics from ugotd8 and confirm or not.
Interesting, with all the reviews on this block up, not 1 pic that has an angle where you could see the hole.

Yep but once you screwed a comp fitting in it would do the same thing, it would only help flow if comp fitting had half a thread and they lined up, removing half the thread from the block makes no sense. Interesting none the less.
Edited by Krahe - 9/21/12 at 6:01pm
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post #403 of 603
Quote:
Originally Posted by Krahe View Post

Yep but once you screwed a comp fitting in it would do the same thing, it would only help flow if comp fitting had half a thread and they lined up, removing half the thread from the block makes no sense. Interesting none the less.

That is a very good point, didnt think that one through. And the inlet is impinged (fine for inlet) in just such a manner as the outlet would be if threads were 360. But to be a defect, the wall would have to be defectively narrow or a circular rim is missing, possible, but weird if so.

But yep, interesting is the best way to put it.

Hopefully someone will chime in on alphacool support forum...after hearing a few comments like yours, hopefully it is a defect. If design, I offered them some tubing to go with it. tongue.gif
http://forum.alphacool.com/viewtopic.php?f=44&t=2653
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post #404 of 603
Quote:
Originally Posted by mdatmo View Post

I think you forgot to include the sample size when calculating the confidence intervals. Confidence intervals are calculated from the standard error. The formula is
Code:
X +- 1.96*s / sqrt(n)
where n is the sample size, X the sample mean, and s the sample standard deviation.
The row should be
Code:
DT Sniper 41.40  0.25 0.25
Note: I am ignoring the fact that 5 is a very small sample size (statistically speaking) and thus should probably use the t-distribution, so we should preferably use 2.77 instead of 1.96.

Im sorry, but really? teaching.gif
post #405 of 603
Quote:
Originally Posted by opt33 View Post

That is a very good point, didnt think that one through. And the inlet is impinged (fine for inlet) in just such a manner as the outlet would be if threads were 360. But to be a defect, the wall would have to be defectively narrow or a circular rim is missing, possible, but weird if so.
But yep, interesting is the best way to put it.
Hopefully someone will chime in on alphacool support forum...after hearing a few comments like yours, hopefully it is a defect. If design, I offered them some tubing to go with it. tongue.gif
http://forum.alphacool.com/viewtopic.php?f=44&t=2653


Looks like part of the design. As long as the Oring has a good seal I think it is ok. That block was the top performer so they must be on to something with the tweaked design. Please don't throw it away. I'm sure somebody would enjoy it. I like it. smile.gif
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post #406 of 603
I have worked as a rigger so am no expert, I just bolt the stuff together that the engineers design, but half a thread would have zero use, i spend 10 days at a time bolting all sorts of structures together and have never seen anything with a half thread, the only reason i can think of is to give the illusion of more strength as people might think only 1-3mm of thread is not adequate, which it probably is in for this application but leaves no room for errors ie over tightening etc. Its like designing half a hose clamp, it serves no purpose at all.
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post #407 of 603
Quote:
Originally Posted by SonDa5 View Post

Looks like part of the design. As long as the Oring has a good seal I think it is ok. That block was the top performer so they must be on to something with the tweaked design. Please don't throw it away. I'm sure somebody would enjoy it. I like it. smile.gif

For 1/2 hole, there are no threads at all, just about 1 mm of acetal. I did decide to test if would seal, after I finished using the block makers name in vain. I slowly screwed in the fitting (by the way it would be easy to cross thread I had to go very slow when starting to keep from doing so), it was just nearing finger tight, then became loose again, ie easily stripped. In 10 years of water cooling, countless builds and testing, never stripped a fitting or seen one leak, I always do finger tight then 1/8 turn with wrench. This effortlessly stripped with my fingers, and never anywhere near snug like the "in" hole fitting that I had put in first, per my pic above.

As far as them being on to something...no. The top design flaw or defect (dont know yet) has nothing to do with the fact they have one of the largest bases with a good broad bow and among most surface area of any block via 68 rows of cross cut pins 2.5mm high. The base is why it performs so well + jet plate design, not the fact it has 1/2 threads missing. Easy to fix that issue without altering performance, however might be few bucks more in cost.

Clearly whoever designed it knows the base is key along with jet plate. Because they were made decently. The rest of the block, like others mentioned, is simply very cheaply made obviously for cost cutting, phillips screws that will strip over time vs hex, mounting system is cheap crap, sticker plopped on top sometimes crooked vs engraved, etc.

No way would I even send for free (and obviously not sell) a defective design or defective part to another person. Although if it is just my top that is defective I will rma so I can test.

There is a third possibility, that it is both design flaw + defect, ie if my outlet hole was punched 1 mm in wrong spot plus acetal rim 1mm thinner, maybe threads go 3/4 way in others, though personally I still would not use even that. If that is case, and stren has a better top, if I decide not to rma since I wont use in my rig 24/7 anyway, might send to him so he can use his top with my base, so we can get another base vs base of same block for more variance testing.

For now, still waiting to hear from alphacool defect or design flaw. Though ugotd8 will let us know Tuesday, if his deliver comes as expected.
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post #408 of 603
Really disappointed with the Summit EF performance. Specially considering I got one. -_- Under load at stock clocks reaches about 50 degrees C (about 22 degrees ambient? Give or take) Will consider getting a different block in the future.
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post #409 of 603
Quote:
Originally Posted by Lovidore View Post

Really disappointed with the Summit EF performance. Specially considering I got one. -_- Under load at stock clocks reaches about 50 degrees C (about 22 degrees ambient? Give or take) Will consider getting a different block in the future.

Bitspower is one of the nicer blocks, aesthetic wise, and judging from pics and reviews, decent quality construction, but base has less surface area than many others and ? broad enough bow. It seems like when choosing a block there is ....quality construction, aesthetics, and performance. Manufactures can choose either one or two variables, apparently illegal to use all 3. That would also explain EKs choice to use circles.

I really like that block and was thinking of getting to test until read specs on base. Shame bitspower top/mounting doesnt fit the alphacool base.
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post #410 of 603
just wanted to say thanks for doing this test. up to date info is always hard to find and thorough & up to date is even better! thumb.gif

selfishly speaking I wish the Raystorm copper performed better. Its hilarious that they charge more for it than the better performing std Raystorm. Well at least mine was hewn from pure solid metal. rolleyes.gif
 
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