ATI 7850 fan stutter after MB & CPU upgrade???

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ESX_BOY

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Jul 1, 2014
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Hi Everyone,
I upgraded the motherboard and CPU in my Brother's Desktop on the weekend, and now the fan on the graphics card is stuttering so it overheats and the PC shuts down!
The original MB and CPU was a MSI MB and an AMD CPU. Now it has an Asus Z97 Pro WiFi and an Intel i5-4670K. The graphics card is an ATI Radeon HD 7850 GPU.
Once I swapped it out, and plugged everything in, we powered it up to format the HDD again due to the chipset changing. We re-installed Win 7 64bit, ungraded all the drivers and firmwares for everything! Latest ATI drivers, etc... and the fan was still stuttering since the first time of powering up the PC.
I downloaded a program to manually alter the GPU fan speed, and set it to 100% but there wasn't any change, apart from it sounding like it was trying to speed harder. I couldn't see any obstructions either.
Is this just shear coincidence that the fan has broke somehow during this upgrade, or am I missing something? Please help! :-S

Thanks in advance...
 
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ESX_BOY

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Jul 1, 2014
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Yeah I did try AMD's CCC too, but that didn't make a difference. I'll ring my little Bro tonight after work and get him to double check if the fan spins freely.

I was going to get him to more it to another PCI slot. Could that be a possible reason? I had a little google search regarding a replacement fan and it doesn't look like you can get a like-for-like part to replace it.

(Updated with quote) :)
 
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nukemaster

nukemaster

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Nov 23, 2004
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The card maker may be able to sell a cooler for it.

I know I had a defective 5770 fan on a card from XFX and I was able to get the full fan/cooler from them.

Failing that aftermarket coolers may be an option.

As for the slot, you can try it, but the card gets power from both the slot and an external connector. The fan is not a power hog or anything either.
 
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ESX_BOY

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Jul 1, 2014
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Its just crazy though that it went at the same time as the Mobo+CPU upgrade. Like you say, bad luck I suppose.

I might just try and convince him to buy a new graphics card. That way I can put his 7850 in my old PC that has an ATI 4870 in it, as it has water cooling for the CPU and GPU. All I need is a water block for 65 quid! :-D

Would be nice to find out what the problem with the 7850 though, it the fan is defo at fault.
 
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nukemaster

nukemaster

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Nov 23, 2004
19,626
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74,965
If you are comfortable removing the cooler(and have the required thermal pads if you damage any), You can just connect the fan to 12 volts and see what it does(you have 4 pins negative|positive(12 volts)|Speed/rpm sense|PWM). With no PWM signal PWM fans revert to full speed operation.

Any messing with the card like this will void the warranty if the card has any left.
 
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