Remember, GPU's aren't like CPU's, they're built to get hot. A general rule of thumb is 40-60*C is cool, 60-80*C normal/hottish, and above that is pretty hot and generally unacceptable for long-term use (depending on the card).
So like I said, keep it around 75*C and you won't have a problem. Shouldn't take you long to save up the $30 it costs for a GPU cooler, anyway. After the cooler, heat will be a non-issue until you volt-mod, and even then you'd have to feed it some serious juice.
With my 8600GT VM'd to 1.60 core (stock 1.33) and 2.10 memory (stock 1.80 or 1.85, can't remember) and overclocked to 920 core, 940 (1880) memory, and 2024 shader, with the Coolermaster Coolviva Pro SE, at idle I sit at 41*C and 58-61*C under load (depending on app./game).
Just keep it around 75*C for now, and after you get the cooler on there, it will be a non-issue.
| CPU | Graphics | RAM | Hard Drive |
|---|
| Intel Core i3 2350m | Intel HD3000 | 8GB Samsung DDR3-1333 Cas 9 | Sandisk Extreme 240GB SSD |
| Hard Drive | Hard Drive | Optical Drive | OS |
|---|
| HGST 1TB 7200RPM | Samsung EcoGreen F4 2TB in Thermaltake eSATA/US... | Stock DVD-RW in External Enclosure | Mac OS X 10.8.2 Mountain Lion |
| Monitor | Monitor | Keyboard | Mouse |
|---|
| Acer 23" 1920x1080 E230Hbd | LG 55LW6500 3D LED HDTV | Logitech K750 Solar/Wireless for Mac | Logitech Anywhere MX Wireless |
| Mouse Pad | Audio | Audio | Audio |
|---|
| Steelseries | Fiio E17 USB DAC | Fiio E09K Desktop Amp | Beyerdynamic DT990 Pro 250-ohm |
| Audio | Audio |
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| M-Audio AV40 MkII Studio Monitors | Polk PSW10 Subwoofer |
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| CPU | Graphics | RAM | Hard Drive |
|---|
| Intel Core i3 2350m | Intel HD3000 | 8GB Samsung DDR3-1333 Cas 9 | Sandisk Extreme 240GB SSD |
| Hard Drive | Hard Drive | Optical Drive | OS |
|---|
| HGST 1TB 7200RPM | Samsung EcoGreen F4 2TB in Thermaltake eSATA/US... | Stock DVD-RW in External Enclosure | Mac OS X 10.8.2 Mountain Lion |
| Monitor | Monitor | Keyboard | Mouse |
|---|
| Acer 23" 1920x1080 E230Hbd | LG 55LW6500 3D LED HDTV | Logitech K750 Solar/Wireless for Mac | Logitech Anywhere MX Wireless |
| Mouse Pad | Audio | Audio | Audio |
|---|
| Steelseries | Fiio E17 USB DAC | Fiio E09K Desktop Amp | Beyerdynamic DT990 Pro 250-ohm |
| Audio | Audio |
|---|
| M-Audio AV40 MkII Studio Monitors | Polk PSW10 Subwoofer |
| View all |
hide details