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Higher temps after new PSU

Forum CPU & Components : Power Supplies, PC Cases & Case Mods - Higher temps after new PSU

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influx0   08-15-2009 at 06:44:45 AM

After upgrading my power supply from a Thermaltake 430w to a Corsair TX650W I've seen my CPU and GPU temps increase by 5-10C. Why did this happen?

If anything I expected my temps to be lower with the new PSU as it has a fan on the bottom, while the old one didn't. The old PSU came with my case which has intake and exhaust fans controlling the airflow, would the tx650w be interfering with that somehow?

This is my case http://www.thermaltake.com/product [...] 000sws.asp


old PSU:
CPU core idle temps were around 37-42 and load temps 57-59
GPU idle temps 65-69 (fan at 60%), load temps 86-89

new PSU:
CPU core idle 42-47, load 59-62
GPU idle 75-79, load is about the same as with old psu, havn't done proper stress testing yet though

The higher temps forced me to lower my already small CPU overclock as well (2.7ghz down from 2.8 - 2.6 is stock). Fans are working as they were and heat sinks have been recently cleaned of dust.

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Silver CPUs badge JohnnyLucky   08-15-2009 at 01:08:44 PM

If I remember correctly the Corsair power supplies come with a temperature controlled fan. If I'm right the psu fan speed increases as the temperature increases. It could be the temperature isn't high enough for the fan to run at full speed. I'm not positive about that.

I looked at the photos of your case. I noticed it comes with a front door which restricts airflow. Are you running with the door opened or closed?

What cpu and video card do you have?

Reply to JohnnyLucky
influx0   08-15-2009 at 03:09:05 PM

Always case door opened.

AMD Athlon 64 X2 Dual Core 5200+
8800GTS 320MB

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