difference BIP3vs BIX3 with low CFM fans.

**korkutkaya** · 07-28-2006, 12:44 AM

I read many threads says BIX are only for 100+CFM fans.
Bad news I have already got a BIX3

However I need silence when I dont OC my PC.
So the question is if the performance difference is huge comparing BIP3(Or any dual flow rads) and BIX3 with low CFM fans?

10 Degree Celsius differance or more?Even further 20C maybe?

Thank you.

**Levish** · 07-28-2006, 05:01 AM

i'd be surprised if the difference is more than 5c if even that

**creidiki** · 07-28-2006, 05:06 AM

depends on how slow you run the fans. the slower the fans, the bigger the difference.

not that the bip is the best rad to compare it with, being the worst of main "group" of rads.

and 5c is not exactly a small amount, all those nubs in the aircooling section use 150CFM stuff to gain like 2-3 over a 60cfm jobbie...

**~~septim~~** · 07-28-2006, 07:39 AM

probably a few degrees only like they say...
try a sanyo denki 108cfm fan, at 7-8volts its quiet enough for me
being its at the back of my case and the games sound effects louder...

**Marci** · 07-28-2006, 07:44 AM

At 1200rpm, diff in coolant temp (in the Pro's favour) is apparently 0.2k
At 900rpm, 1.3k
At 400rpm, 1.8k

In terms of flow restriction, at 4lpm, both rads exhert a 17% drop in flow rates (acc to Radiical's results published in HardwareLuxx Mag - a german national publication, May 2006). Same results show PA120.3 to whip everyone else's butt when it comes to performance at lowest noise.

Performance order (best to worst) based on final coolant temp at 600rpm (LOW airflow):

Thermochill PA120.3
Watercool HTSF
Watercool HTSF3-x
Cooltek Maxistream / Swiftech MCR
Black Ice GT
Black Ice Extreme
Alphacool NexXxos Pro
Black Ice GT X-Flow
Black Ice Extreme X-Flow
Alphacool NexXxos Extreme

At 900rpm:

ThermoChill
Cooltek
BI GT
WC HTSF
BIGT-XFlow
WC HTSF3-x
NexXxos Pro
BIX
NexXxos Extreme
BIX-XFlow

At 1200rpm:

ThermoChill
Cooltek
BIGT
BIGT-XFlow
BIX
NexXxos Pro
NexXxos Extreme
HTF3-x
HTSF
BIX-XFlow

Restrictivity to flow (drop in flow rates - smaller the % the better), tested at 4lpm with DDC+

ThermoChill - 6%
HTFX3-x - 14%
BIGT - 17%
BIGT XFlow - 17%
BIX - 17%
BIX XFlow - 17%
HTSF - 17%
Cooltek - 18%
NexXxos Xtreme - 23%
NexXxos Pro - 27%

Radiical53 would have to drop in to explain these results in any more detail... I can't read german!

**creidiki** · 07-28-2006, 07:52 AM

how much die temp diff does 0.2k make?

**Marci** · 07-28-2006, 08:03 AM

Not a lot at a guess...!

**korkutkaya** · 07-28-2006, 10:55 PM

Thank you for the replies.

I was OC geek but not any more.I decided to move WC since my room temp and pc got too hot.I needed quite cooling solution.

So afew degree C is not a big problem for me.

So anyway BIX3 will do the job even low CFM fans on it as I understand.

Also I have strong pump(3000l/h) and I hope it'll help too.

Thanx again

**Radical_53** · 07-29-2006, 12:30 AM

@korkut: The BIX will still do a good job at low cfm fans, yet it looses way more performance when you turn down your fans compared to other rads.
If 5C don't hurt you, well...

@marci: Lowest rpm we used was 600rpm, as the fans didn't give a proper reading with the controller we used at way lower rpms. Also, that was Yates running at 4V, should normally satisfy any enthusiast who's still looking into performance. Noise geeks would turn the fans off anyhow.
Biggest surprise, to me, was that a PA with the shroud was able to maintain a performance level at 600rpm that all other rads needed 1200rpm to get to.
If it comes to low noise, nothing is even close to the PA at this time.

**eXa** · 07-29-2006, 07:58 AM

ot. what thread size does the pro use? going to switch out the perfect crap fittings i got now...

**creidiki** · 07-29-2006, 08:42 AM

I think its G1/4...

**eXa** · 07-29-2006, 08:55 AM

thats what i thougt....

**korkutkaya** · 07-31-2006, 01:11 AM

Thank you again for the replies.

I have recognized there r 2 BIX3.1 is x flow the other single flow.Thats right?

If so I ordered xflow version.Is it worse then single flow BIX3?

Korkut

**Marci** · 07-31-2006, 02:05 AM

No... one is single PASS (the XFlow - listed above as BIX XFlow), the other is dual PASS.

The DualPass version (BIX in the above lists) offers best performance.

**korkutkaya** · 07-31-2006, 02:29 AM

Thank you Marci

**Praxis1452** · 07-31-2006, 06:58 AM

don't get Xflow... =P

**voigts** · 07-31-2006, 07:12 AM

The question in my mind is how all this translates into price/performance. For us US folks, we basically have a choice of the Thermochill, Black Ice GTS, the older Black Ice Pro, the BIX, and the Swiftech MCR. The thermochill rads run $115 US, but the Black Ice Pro 3 can currently be had for $42, while the GT runs $60. So the Thermochill is almost 3 times as much as the older BIP. So real world in average DDC/Apogee/Maze 4 type setup, how much of a temp difference if any can be expected?

**creidiki** · 07-31-2006, 07:22 AM

Depends on how slow you run your fans. Up to 4k @ low speed, between PA and MCR/GT. BIP/BIX are even worse.

Considering that temp diff between a decent CPU block and a Storm MP-05 LE are usually in the 1-2k range, I call that pretty good value for money

**voigts** · 07-31-2006, 07:42 AM

I should have mentioned that I am referring at low speed/cfm specifically.

**creidiki** · 07-31-2006, 07:45 AM

PA w. Yates @ 600rpm equals or beats other rads @ 1200rpm.

**J-Mag** · 07-31-2006, 08:57 AM

Originally Posted by creidiki

PA w. Yates @ 600rpm equals or beats other rads @ 1200rpm.

How can you generalize with RPM only? Pressure from fan blade and housing design also plays a role.

**creidiki** · 07-31-2006, 09:01 AM

we're talking yates on both rads here...

**Radical_53** · 07-31-2006, 09:27 AM

Also, show me a fan with a better rpm to performance ratio

25mm thickness. Haven't found one yet

**J-Mag** · 07-31-2006, 09:42 AM

Originally Posted by Radical_53

Also, show me a fan with a better rpm to performance ratio

25mm thickness. Haven't found one yet

Yeha I agree, but 38mm thick models have greater flexibility in time of need when running under a fan controller.

**creidiki** · 07-31-2006, 10:07 AM

I cant argue with that, but even the best 38mm fans - those SanAces you sell - @5v arent even close to what I consider "silent" as far as fans go.

Personally I'm in love with my 140x25, 62CFM yates

Anyway, the fact remains that PAs performance lead is fairly considerable @ low airflow - though the real airflow might be pretty close considering how low the backpressure on PAs is with theire sub-10fpi count.

Even if youre usually running more CFM than a Yate gives, the fact that they have about 1/2 the waterflow restriction compared to other rads makes them worth it, imo.

But then again, I've always believed in investing in the best and sticking with it for the long-term. And im also prepared to sacrifice component budget for cooling... YMMV

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