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Mikeluz replied to EP 61BXA-M sucess story, but...

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

01-18-2007, 08:46 PM
Re: EP 61BXA-M sucess story, but... [Fix complete!!!Pictures inside!!!]

[b]Rainbow[/b] thanks for your feedback!
The specs of the CET CEB6030L (Logic Level) MOSFETyou gave me on your previous post:

"[b][i] Rds(on)=20mohm @ Vgs=4.5V, Id = 52A continuous, 156A pulsed,[/i][/b]"

were most helpful!

Also, the info that:

"[b][i] Yes, you can use logic level mosfets for all motherboard VRMs[/i][/b]"

was the definitve info I was looking for!

After I've...

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Mikeluz replied to EP 61BXA-M sucess story, but...

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

01-18-2007, 09:08 AM
Re: EP 61BXA-M sucess story, but...

Thank you Rainbow, for the input!

I'll post the results here after I replace both MOSFET's, after school exams

Best luck for you!
Mikeluz...

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Mikeluz replied to EP 61BXA-M sucess story, but...

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

01-15-2007, 09:58 AM
Re: EP 61BXA-M sucess story, but...

How do I determine if I can use logic level MOSFET's? (I can't find the VRM controller datasheet anywhere in the www). OR, in another words, can I use, by default, logic level MOSFET with VRM's? IF the answer is Yes, then I'll buy the couple of MOSFET needed, based on the Id & RDSon that you advice me to. If the answer is NO, what MOSFET's do you advice me to buy (any example)?

TIA,
Mikeluz...

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Mikeluz replied to EP 61BXA-M sucess story, but...

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

01-15-2007, 09:52 AM
Re: EP 61BXA-M sucess story, but...

What RDSon value should I look for?...

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Mikeluz replied to EP 61BXA-M sucess story, but...

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

01-15-2007, 09:50 AM
Re: EP 61BXA-M sucess story, but...

What Id value should I look for? 30A? 40A? It's a Slot 1, P3 600 (Katmai core) that I'll run on it....

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Mikeluz replied to EP 61BXA-M sucess story, but...

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

01-09-2007, 06:30 PM
Re: EP 61BXA-M sucess story, but...

Hi [B]Rainbow[/B] and [B]gonzo0815[/B]!

Well, I've measured temperatures of the BUK455-100Aduring Prime95 and the results are:

T _P2 350@434 (FSB=124MHz) _ = 95ºC (max)
T _P3 450@554 (FSB=124MHz) _ = 105ºC (and raising!!!)

so I've decided to limit the CPU to the P2350@ 434, but I continue to think that 95ºC @ room temperature of about 18ºC is way too much! On Summer ambient temperatures here at Portugal go as high as 38ºC so BUK455 will probably fry! (As a side note, on the computer I'm...

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Mikeluz replied to EP 61BXA-M sucess story, but...

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

01-09-2007, 06:07 PM
Re: EP 61BXA-M sucess story, but...

Hi [B]Rainbow[/B] and [B]gonzo0815[/B]!

Well, I've measured temperatures of the BU455during P95 and the results are:

T _P2 350@434 (FSB=124MHz) _ = 95ºC (max)
T _P3 450@554 (FSB=124MHz) _ = 105ºC (and raising)

so I've decided to limit the CPU to the P2350@ 434, but I continue t think that 95ºC @ room temperature of about 18ºC is way too much! On Summer ambient temeratures go up to 38ºC so BUK455 will probably not survive! Anyway on the computer I'm writing now, a P4 1800A, when Oc'ed to...

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Mikeluz replied to EP 61BXA-M sucess story, but...

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

01-09-2007, 07:02 AM
Re: EP 61BXA-M sucess story, but...

The above link to the BUK455 100A datasheet is not working now, so here's another:...

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Mikeluz replied to EP 61BXA-M sucess story, but...

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

01-09-2007, 06:15 AM
Re: EP 61BXA-M sucess story, but...

Thank you for the reply [B]gonzo0815[/B] The chip you are talking about, I supose it's also called a "driver chip"? And usually there's one near the MOSFET to drive them though I don't know how that driving it's done. (I'd like to know how that driving is done, as a curiosity.) The IC chip on the picture above, near the top MOSFET, is a [B] ALPHA AS1664S [/B] (also written is 9740 --but i think this 9740 is the manufacturer year/week, so it's not relevant), so I'll google it as you advice me!

About the...

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Last edited by Mikeluz; 01-09-2007, 06:19 AM.
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Mikeluz replied to EP 61BXA-M sucess story, but...

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

01-08-2007, 02:36 PM
Re: EP 61BXA-M sucess story, but...

Care to point me to some of those logic levels MOSFET's, that are compatible to these D50N03A, please? At this point, I can't continue further without any enlight. I don't know how a VRM works, neither how MOSFET works on the VRM, how it figures what is the voltage / current that it has to deliver to the CPU, etc. Is there any tutorial where I can learn how does a VRM work?

TY,
Mikeluz...

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Last edited by Mikeluz; 01-08-2007, 02:41 PM.
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Mikeluz replied to EP 61BXA-M sucess story, but...

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

01-08-2007, 07:58 AM
Re: EP 61BXA-M sucess story, but...

Thank you for the reply! Yes, there are two MOSFET's near each other, located near the CPU slot1. (attached is a aimage showing the relevant zone, at left of the Slot1)

But, I don't know *for sure* which are the specs of the original MOSFET's, that's is my problem!

If I don't know *for sure* those specs, then I can't search for a proper replacement(s). (According to Kc8adu, the D50N30A is 30v, 50A, but I want to know *for sure* if that info is accurate! I've searched the web and I've seen D50N03 (not...

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Last edited by Mikeluz; 01-08-2007, 08:06 AM.
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Mikeluz replied to EP 61BXA-M sucess story, but...

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

01-08-2007, 06:55 AM
Re: EP 61BXA-M sucess story, but...

My principal problem is not knowing about the charateristics I should look for on the MOSFET, how should I get a replacement? The BUK455100A that I was told that I could replace the D50N30A original MOSFET, looks like does not meet the original specs of the board, and I can't find any conclusive datasheet about the original MOSFET. I'm not sure of what could happen if I try one of those Vishay ones, because they have different Idrains @ the same VDS, VGS, so I guess that I could fry the CPU if I feed it with current above its requirements. So...

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Mikeluz replied to EP 61BXA-M sucess story, but...

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

01-08-2007, 06:42 AM
Re: EP 61BXA-M sucess story, but...

Hi! Thanks for the reply!

I'll do that recapping, as soon as I get replacements here at Portugal! Back here is difficult to find Low ESR caps, so I've got the order from outside Portugal.

I've searched further on the web about the original MOSFET and I came across these links (by the order I've opened them

[url]http://www.icpart.com/SALESDETAIL/D50N03A.html[/url]

clicked on the PDF icon lead us to:

[url]http://www.alldatasheet.com/view.jsp?Searchword=D50N03A[/url]...

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Mikeluz started a topic EP 61BXA-M sucess story, but...

in Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals

01-08-2007, 06:11 AM
EP 61BXA-M sucess story, but...

Hi!

I own a EPoX EP-61BXA-M, that used to have bad caps. Actually, the former owner, had a little trouble with this board, on the VRM, near the CPU slot1... a badcap vented and as a "bonus" a MOSFET near the badcap burned out, rendering the CPU -- a P2 350MHz -- dead.

The [U]badcap[/U] was a TAYEH 10v 1000uF, and the MOSFET was a D50N03A. I canibalized a 6.3v 1200uF to put on the place of the 10v 1000uf (didn't have any 10v 1000uF, only a 10v 2200uF, but I didn't tried this one until a later time, further on this post). As I said canibalized a 6.3v 1200uF...

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Last edited by Mikeluz; 01-08-2007, 06:15 AM.
Mikeluz replied to I need some pictures to identify Sanyo WG caps

in General Capacitor Questions & Issues

02-27-2006, 06:51 AM
Re: I need some pictures to identify Sanyo WG caps

I guess they are not fake... but just want to hear from someone else, a sevond oppinion, to be on the safe side.

By the way, do you know if this temperature behavior on this thread "Intersil HIP6602BC @ 95ºC?! Is this normal?! " [url]https://www.badcaps.net/forum/showthread.php?p=10807#post10807[/url]

Thanks,
MikeluzRe: I need some pictures to identify...omeone else, a...

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Mikeluz replied to Intersil HIP6602BC @ 95ºC?! Is this normal?!

in General Computer & Tech Discussion

02-26-2006, 09:11 PM
Re: Intersil HIP6602BC @ 95ºC?! Is this normal?!

Update:

idle temperatures:

HIP6602 #1 (nearer the caps): 48ºC
HIP6602 #2 (nearer the coils): 40ºC

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Mikeluz replied to I need some pictures to identify Sanyo WG caps

in General Capacitor Questions & Issues

02-26-2006, 08:58 PM
Re: I need some pictures to identify Sanyo WG caps

Hi!

I own a EPoX 4PEA+.

I removed the 3300uF, 6.3V, SANYOs WG and their bottom has two "flavours" like on the pictures that were posted:

1st "flavour" -- flat bottomed;
2nd "flavour" -- "T" bottomed

Also, did you mention fake Rubycon YXG? I've received from EPoX.NL some 1000uF 6.3V YXG Rubycons with dimensions 8x13mm different from Rubycon datasheet (10x16mm). Were your fake Rubycons 8x13mm also?
...

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Mikeluz replied to Intersil HIP6602BC @ 95ºC?! Is this normal?!

in General Computer & Tech Discussion

02-26-2006, 08:12 PM
Re: Intersil HIP6602BC @ 95ºC?! Is this normal?!

Hi! Thanks for the repply!

The datasheet states that the max Case temperature is 150ºC, and the max Junction temperature is around 125ºC. On the datasheet it's said that these drivers are suppose to be used on P III and Athlons...but they are used on this P4 motherboard! :o

Any idea what might be causing so much heat? I don't know if this situation (temperature) is normal, thought, I was not alert to this temperature thing since some time ago.

At idle, the capacitors...

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Last edited by Mikeluz; 02-26-2006, 08:15 PM.
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Mikeluz replied to Intersil HIP6602BC @ 95ºC?! Is this normal?!

in General Computer & Tech Discussion

02-26-2006, 07:15 PM
Re: Intersil HIP6602BC @ 95ºC?! Is this normal?!

The same chip (still) gets really hot during P95 @ 1800MHz (default clock) @ 1,400 V (-0,100 V under the default 1.500V), so it's neither the higher Vcore nor the high clock (OC) that cause this really hot temperature.

Kind regards,
Mikeluz

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Mikeluz started a topic Intersil HIP6602BC @ 95ºC?! Is this normal?!

in General Computer & Tech Discussion

02-26-2006, 06:54 PM
Intersil HIP6602BC @ 95ºC?! Is this normal?!

Hi!

I have a EPoX 4PEA+ P4 board.

It has 2 x Intersil HIP6602BC ("The HIP6602B is a high frequency, two power channel MOSFET driver specifically designed to drive four power N-Channel MOSFETs in a synchronous rectified buck converter topology.").

One of them gets really hot (about 95ºC under P95 with my P4 1800 @ 2400 MHz @ 1,600 V). Since it's connected to 3 x 2200uF capacitor GSC (yes I know that they are "bad", but their capacitance is right, and they are not bulging) these 3 capacitors get really hot two (about 70ºC).
...

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EP 61BXA-M sucess story, but...

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Intersil HIP6602BC @ 95ºC?! Is this normal?!