What's the likelihood of your NB Chipset affecting your GPU Temp?

[Emphacy]

Okay here's the story.
My first post on this forum was due to my Radeon HD 4870 reaching a rather insane temperature of 148 degrees Celsius.

Kinda strange since thermal trip is at around 125 degrees, tested the temps on GPU-Z and EVEREST Ultimate, definitely the Memory overheating.
The memory sits around 15 degrees higher than the core. It's not overclocked, I can't overclock it with the temps I get off playing 10mins of COD WAW.

Question is then, what's the likelihood of my northbridge which under load usually reaches about 70 degrees, affecting my GPU memory Temp?
The card uses an Akasa Vortexx Neo cooler, suppose to be one of the best. It's either faulty, or the NB is causing problems for it...

I'm seriously unsure whether to try another cooler on it, although the one i'm using gets the best reviews.
OR... Go and buy another HD 4870 off the bay for a nice £50 then maybe crossfire it when I get a new mobo...

I really am not gonna spend over £100 on a 5850 or something when my 4870 still does the job.
Opinions much appreciated guys, I really am stuck on options here.

 

[Emphacy]

I used AC Silver MX2 Thermal Paste, been on there for about 4 months.
I used the thermal pads that came with the cooler on the memory.

I checked contact of them all like recommended in the last thread, no bad contact what so ever.

 

[Emphacy]

Yes it burns my hand... Even at idle, which sits around 70 degrees celcius.
Seems rather high to me... The northbridge as said sits around 55 degrees idle, reaches 70 under load, overclocked FSB is most likely the reason.

If I take the side panel of theres a change of about 2/3 degrees celcius, although I have 3 120mm and an 80mm intake fan and a 120mm and 80mm exhaust.

Got all the latest software, all read the same thing. Temperatures stay constant, only rise to insane temps during load, (i.e. playing games)
Thanks for your help guys but it really does look like a faulty card, may buy another one from the bay...

 

[Emphacy]

Link to Thread

Yes mate, it's exactly what I thought, would have been black and crispy by that temperature, which leads me to believe it's even more faulty.

Also system immediately shutdown. I left it for 5mins booted up again, EVEREST displayed 148 degrees celcius. (showed this in sidebar before shutdown, sidebar stays like it was before the PC shut down on start up, until everest is restarted)
Loaded up GPU-Z and it was just just throttling down from 98 degrees.

 

[Emphacy]

When asking for advice like this, essentially temps and what could cause it, more information is needed.

System spec, what mobo, which hd 4870, what case, take a screen shot of highest temps in gpu-z and post it, take a pic of your case and post it.

Do you have a 3rd party hd 4870 and a cooler that only fits properly to a reference design pcb? What mobo do you have, what kind of chipset heatsink, does the mobo have an alternate pci-e slot, have you tried the gpu in that slot further from the northbridge, etc, etc. Are you using a "proper" case or a tiny box with one 80mm fan exhaust, if its a decent case, is the front/rear fans working properly, is the gpu fan running properly in use, if it is running, does the fan have speed control either via its own controller or because its connected to the normal header on the graphics card that lets you change it like normal in CCC, if so, have you whacked the speed up.

Most of those things would be answered with system spec and a pic of gpu-z/case.

All information is in this thread and the link given to my first thread regarding this problem of mine. I did have a signature displaying setup but changed it. MSI P43 Neo-F. 1 PCI-E slot, NB chipset sits around 3/4 inch above GPU.

 

[Emphacy]

Think i've sussed it guys...
Using aftermarket coolers on HD 4870's cause huge heat problems as i've read from many reviews and other forums.
Generally aftermarket coolers do well at cooling the core, while they are more poor than the stock cooler at cooling the cards VRM's.

I ran Furmark on 1280 by 1024 resolution with XTreme Burning mode on, and well the GPU never went above 80 degrees celcius, and the memory reached about 104/5 degrees celcius max! (Also used GPU-Z).

VDDC Temps where around 130 degrees celcius! The vortexx neo doesn't even cool the VRM's at all, doesn't even touch them.
I think it's time to revert back to a stock cooler. Although, still doesn't quite explain the 148 degrees celcius MEMIO Temp.