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<blockquote data-quote="JoeSmith" data-source="post: 559767" data-attributes="member: 60415">AW: Which mainboard can disable PCIE in Bios?i think the new radeons (5***) have a very low power consumption when they are idle. They clock down and lower gpu voltage. From what i have read the idle consumption is lower than 20W (more like 15W) depending on the model. I myself use a HD4670 which is said to have an idle consumption of <a href="http://ht4u.net/reviews/2009/leistungsaufnahme_graka/index31.php" target="_blank">only 8W</a>. If you now compare price to value i think its not useful to have two graphic cards (the not working card will never be using 0W) because the internal version will also drain some power (i would guess at least 5W).So i would take a look at the 57** series (if that is enough power for you) and forget about the onboard card. If the non-onboard card consumes more than 10W more than the onboard then the price for power will be ~18€ a year if your htpc runs for 24hs a day (10W*24h*365d = 87600W:1000W = 87,6 kw - the price for a kW here is ~0.2€ = 17.52€).Now i'm guessing that your htpc doesn't run all the time so it's even less. On the bonus side you'll get smoother play and advanced features and you don't need to reboot to play games, ...Because of the rather low power consumption the heat dissipation should be quite low tooJoe</blockquote>

[QUOTE="JoeSmith, post: 559767, member: 60415"] [b]AW: Which mainboard can disable PCIE in Bios?[/b] i think the new radeons (5***) have a very low power consumption when they are idle. They clock down and lower gpu voltage. From what i have read the idle consumption is lower than 20W (more like 15W) depending on the model. I myself use a HD4670 which is said to have an idle consumption of [URL="http://ht4u.net/reviews/2009/leistungsaufnahme_graka/index31.php"]only 8W[/URL]. If you now compare price to value i think its not useful to have two graphic cards (the not working card will never be using 0W) because the internal version will also drain some power (i would guess at least 5W). So i would take a look at the 57** series (if that is enough power for you) and forget about the onboard card. If the non-onboard card consumes more than 10W more than the onboard then the price for power will be ~18€ a year if your htpc runs for 24hs a day (10W*24h*365d = 87600W:1000W = 87,6 kw - the price for a kW here is ~0.2€ = 17.52€). Now i'm guessing that your htpc doesn't run all the time so it's even less. On the bonus side you'll get smoother play and advanced features and you don't need to reboot to play games, ... Because of the rather low power consumption the heat dissipation should be quite low too Joe [/QUOTE]

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