8500GT overheating while decoding h.264

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breny

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#20904 9-Apr-2008 16:56

I have the passively cooled MSI 8500GT with HDMI
http://global.msi.com.tw/index.php?func=proddesc&prod_no=1231&maincat_no=130&cat2_no=136

It performs very well with the onboard decoding of h.264 keeping my CPU in the 5-8% range while watching the DVBT broadcasts.

The card temperature normally doesn't deviate from 70 degrees while surfing/photoshop etc..

While decoding the DVBT stream the card temperature rises to the low-mid 80's.

While decoding DVBT and trying to surf/do other tasks the card temperature exceeds 92 degrees and the video crashes which is evident in the fact that both my monitor and my LCD TV go blank while the computer keeps running.
After a reboot the card is functional again and will continue until it overheats again in about 20mins...

We all know how much 'grunt' is required for the h.264 decoding and my impression is that by passing it on to the GPU it creates a need for significantly higher heat dissipation!

Any one else have experience with the passively cooled cards?
Maybe a fan cooled card is necessary for continued operation of the hardware decoding...

sbiddle

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#122357 9-Apr-2008 16:58

WHat software are you using to monitor the temperature?

breny

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#122361 9-Apr-2008 17:10

Am using the nvidia nview (MonitorView) software

sbiddle

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#122362 9-Apr-2008 17:18

I have an Ausus 8500GT. I'll have a look tonight and see what sort of temperatures I get.

gehenna

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#122365 9-Apr-2008 17:20

I'm fairly sure the mid 80 degree mark is standard for a passively cooled 8000 series nvidia card when processing video

Nety

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#122381 9-Apr-2008 19:02

How much air flow are you getting past the video card? You need to be getting a reasonable amount of air flow past the cooling fins and that air needs to also be fairly cool.

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Seasport

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#122440 9-Apr-2008 21:54

I have the same card. Mine is currently running at 75 degrees while doing h.264 decoding. This is with the lid off my PC though.

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DS248

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#122449 10-Apr-2008 00:13

FWIW the following are temperatures for a passively cooled ASUS 8600GTS (large heatsink) - measured with CPUID HWMonitor.

With system idle the GPU temperature is around 41°C.

During ~1hr watching mostly TV1 (in PowerCinema) the max GPU temperature reached was 48°C. After ~15mins temperature stabilised in the 46°C - 48°C range. Same temps when viewing the HD preview channel.

Have not monitored 1080i on TV3 yet (next 1080i programs not till Friday?)

Max temperature in all 4 CPU cores was < 40°C with no other programs active (typ. 34°C - 37°C)

Nirodha

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#122454 10-Apr-2008 01:11

breny:
We all know how much 'grunt' is required for the h.264 decoding and my impression is that by passing it on to the GPU it creates a need for significantly higher heat dissipation!

Any one else have experience with the passively cooled cards?
Maybe a fan cooled card is necessary for continued operation of the hardware decoding...

I'd check the case air flow to see if it was all good. And, if it was, I'd probably buy a little vga fan and glue it onto the gfx card heatsink. They're inexpensive, like ~10$.

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mentalinc

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#122473 10-Apr-2008 09:10

Nirodha:I'd probably buy a little vga fan and glue it onto the gfx card heatsink. They're inexpensive, like ~10$.

This is likly to very noisy little fan prob want to by a 120mm case fan to improve the total airflow - buy one that is designed to be silent

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breny

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#122911 11-Apr-2008 18:35

Thanks for all the input - I am investigating the airflow in my case (Silverstone LC-13)...
It would seem that the video card gets 'left out' somewhat in this case. Most of the airflow is directed at the CPU and drives...
The front fan in this case is quite noisy anyway so I think I'm on the market for a new one!
Am wanting to change to a tower style case so:

Any suggestions for a QUIET mid tower ATX case with good video card airflow?

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#122921 11-Apr-2008 19:12

breny: TAny suggestions for a QUIET mid tower ATX case with good video card airflow?

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DS248

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#122950 11-Apr-2008 21:11

What price range?

breny

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#123154 13-Apr-2008 09:32

$200-$300 would be nice...

DS248

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#123176 13-Apr-2008 11:55

The ANTEC P182 would fit the bill airflow- & quiet-wise & looks good too (taste dep) but is more like $360 (eg. http://www.computerlounge.co.nz/components/componentview.asp?partid=4613). My system runs very cool - it is not spec'd as an HTPC though.

Not certain the P182 would make an ideal HTPC case - no display, no IR etc. For something not too big, the Antec Fusion 430 V2 looks good (MATX though). Includes IR Receiver & quiet PSU (http://www.youtube.com/watch?v=lyc6eVBoK1w&feature=related). Closer to the $300 mark too (~$303 cheapest on Pricespy). We are looking a building a separate HTPC & will likely use the Fusion 430 (unless there is a better recommendation). In our case size is an issue though - needs to be <150 high (for max 170 shelf spacing).