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Inquire about (MOSFET) on my card graphics sapphire vapor x hd 7770 ghz edition oc 1gb gddr5

Ahmed Elbahary

Ahmed Elbahary

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Oct 25, 2015
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have sapphire hd 7770 ghz edition oc vapor x 1gb gddr5 dual fan
But while what I install the 6pin, the computer runs for less than a quarter of a second, then completely extinguished

I connected the 6 pin in graphics card, without I install the graphics card in the computer,
It also happens the same problem




Note. !!!

When I install the graphics card without 6pin, the device works without stop, but as you know, can not function graphics card without a 6pin
Here here this problem occurs when the ground Energy receives graphics card

for this i think by 98% problem on (MOSFET) on my card graphics sapphire vapor x hd 7770 ghz edition oc 1gb gddr5


The question is..


There are three words on the (MOSFET) in card graphics, is B17 and 49 and 63ng

can i get (MOSFET) of any motherboard like gigabyte or other or get it of another card graphics but not like this and change this for sapphire vapor x hd 7770 ghz edition oc 1gb gddr5 ??
 
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Ahmed Elbahary said:
for this i think by 98% problem on (MOSFET) on my card graphics sapphire vapor x hd 7770 ghz edition oc 1gb gddr5
Click to expand...
Why do you think it is a MOSFET? And how would you recognize it? I don't recall ever seeing a MOSFET labeled as MOSFET. Some might have MF in the part number, but as seen here most look like any number of common transistor devices.

Plus, that card has a cover over it. Did you disassemble the card? Do you see burnt components?

I would be more inclined to suspect your PSU. What PSU do you have?
 
i have PSU dell workstation 550W

What should I do to solve this problem please??
 
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I would swap in a spare PSU first and see what happens.
 
Also, multiple components may already be damaged on the card. I don't think I've seen a successful repair of this type on any of the forums. I'm sure somewhere some cards get repaired, but it takes the right tools and skill. Better to just grab a cheap GTX 950 if possible or even 750Ti.
 
Each topic is
Now that my case does not allow for the purchase of a new graphics card
And graphics card I bought this from two days
It seems that this problem occurred because I tried run this graphics card to psu weak already it worked for 5 minutes without any problems, then turned off the computer and when I come to run and I faced this problem
He told me a lot of people you should get psu forces, in fact you told myself Wow problem in the psu I'm an idiot because I did not know
Indeed, I pay a lot of money to get stronger like PSU dell workstation 550W, and also got the same problem
I am very despair.


Do you have any professional person here tell me how do I solve this problem or show me the site has got a solution to this problem or the like
I think it will be the happiest day of my life


By the way, sorry for my English ..
 
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can you pls make picture of lable of the dell psu and your old psu and upload it here (pls make sure text on the lables is readable)
 
Note..
The old psu was without 6pin but i installed 6 external pin him
and the new psu one in which there are 8 pin and two 6pin
ols psu.png
new psu.png
newpsu1.png
 
have you tried to power card with both 6 pin conncetors and thoes problem excist with both of them (8 pin conncetor is for mb).
does all cables conncect to psu with one big connector or there are separeate conncetors for different cables. do you have user manual for the psu and did you followed it strictly when you connected cables to psu
 
We did not need to 8 pin now,, Because I discovered that I do not have 8 pin i sorry
We are talking about the 6 pin
When I install the graphics card without the 6pin
The computer is running normally
But as you know, can not for the graphics card that works without the 6 pin
When I tried to do I just installed the Ground of the 6pin it works without having to stop the machine when I do I install it so
He spoke the same problem
Is this the problem of short ground on card graphics or what
 
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When you use the measuring device (Excel DT9205A)
And I measured the 6 pin which is in the graphics card
When I do the measurement of any one of the 6 pin with any one of 6 pin the measuring device gives me a voice
 
pls dont add/remove cables to the card while pc is running unless you want to buy new card or psu (or both).
if no one has tried to "fix/repair" the card there shouldn't have anything shortened on it.
turn off pc and install one of the 6 pin connectors. check if it works. if not truno off pc and try with 2nd 6 pin cable. and try again.
when you lose image when card is connected to power. during boot or when you enter windows. also what is the rest of your pc (cpu, ram, mb etc.). add your system specs here http://www.techpowerup.com/forums/account/specs
 
ne6togadno.. u best man i see to solve problem.. :)

but


I have only two of the 6 pin
When I connect it to the computer does not boot, reboot it for less than sec then switches off completely
When you use the measuring device (Excel DT9205A)
And I measured the 6 pin which is in the graphics card
When I do the measurement of any one of the 6 pin with any one of 6 pin the measuring device gives me a voice
and
I experimented with a lot of the psu and got the same problem

what should I do.??
 
remove cooler of the card and check if something has dropped between it and pcb (make sure you have thermal paste to replace the old one when you put cooler back). check if insulation of the cables for the fans inst damaged. does the card has warranty left and can you as for replacement/refund.
do you have other cables in case that are touching the card.
 
It has no guarantee :(
Because I've got it inhibited

I have tried to remove the Cooler and also got the same problem
And also clean the entire card
And also got the same problem
Is there a capacitor which is almost must change or remove, and then experience before change

It will be the happiest day of my life when coast this problem
 
i doubt anyone outside of sapphire will be able to tell you what can cause this problem and is there any why to fix it. may be you should ask in sapphire support forum cause it sapphire are the only one that know electrical diagram of pcb.
i hope you havent paid too much money for it cause most likely cant be fixed.
 
Look
i tried this card graphics on more than computer
and also i got this problem
when i extract psu and just install card graphics. without motherboard and any thing other
Also do not working , working only less than a quarter of a second and then stops completely
 
card cant work w/o mb. vga cards need cpu to tell them what to show on screen so powering the card w/o mb wont show you anything beside may be card loading vbios.
 
Ahmed Elbahary said:
see this is my problem.. i make it video

can you help me now. how to fix it
Click to expand...
We better come to some common definitions: a video card that "works" for quarter of a second is a non-working card.
A cause of an internal short be anything from a blown capacitor to a damaged PCB of this card, not just a working mosfet.

Since you have already determined that your card is shorting, I would recommend NOT to put it into PC and NOT to plug it into a power supply.
Your computer was quickly shutting down due to overcurrent protection kicking in.
It did, however, kept working without the connector, because no power was coming to it and if you had not forgotten to attach a buzzer to the motherboard, you'd hear beeps indicating that "Videocard is Not Detected".

Mosfet can be a cause of malfunction, but if you did not see any burning or overheating - then it is less likely to be the cause.

Start with capacitors on each power phase, and only then move on to mosfets.
Diagnosing such problem is always pain in the ass, so I found it much easier to determine which phase is faulty by desoldering mosfets with a hot-air rework station, and then checking each line again.
It may sound strange at first, but it is much faster than checking this stuff by hand.

In case you are looking for replacements - look for a chinese supplier, or spend $10 on an identical dead card and transplant mosfets from it (which is what I would do to avoid waiting).
Where I'm from I could only find a few models of NIKOS single-channel mosfets (P0603BD and similar), but no dual-channel FETs, like in most newer cards. Looking for a donor is your best option.
 
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