Lord Letto, on 12 January 2015 - 03:14 PM, said:
Derp, just looked through the thread again and noticed you were talking about the R9 280X, I thought you were talking about the MSI 770 OC. on the 280X, this here:
http://www.tomshardw...equirement.html
Says recommended is a 750W, some say Quality 500W will work while others say stick to the Manufactures Recommendation of 750W, with some saying 750W for XFire while Manufacturer says 1000W for XFire? I don't know, I tried looking at AMD Page for the cards before but never noticed where it says Max TDP and Recommend Minimum PSU Wattage unlike on the Nvidia Site for their Cards. as for the 270, according to this thread:
http://www.tomshardw...quirements.html 500W should be enough as long as it got at least a Maximum Combined +12V continuous current rating of 28 Amps or greater and at least 1 6 Pin PCI-E Power Connector. according to this:
http://www.tomshardw...iew,3107-7.html
the 7870, R9 270 & 270X is on the same level as the GTX 660Ti & 760
http://www.tomshardw...0x,3635-18.html
This is the card only
If you add in the Mainboard/CPU its a question what you get amd or intel
If you add now peripherie like Fans, HDD, SSD, Mouse, Keyboard, USB Stick etc.
You have somewhat a power consumption over the fump.
Also you should notice that any oc could add up some watts too.
now you can determinate your base system + oc of a i7k (it is still base system only cpu, ram, fan, ssd, mouse, keyboard consume some watts)
now you add the power consumption of the gpu. For example one of the fearsome cards of the last period a oc-able msi 290x lighning with 2 8xPol and 1x6 Pin ATX power connectors.
This card consum in avg 260w but can spike to 450W if oced and under full load. So there are the problems to find the right psu. And the gaps in supposed psu wattage you showed.
I recommand you should look up the pci power connectors on the graphic card to have a knowledge what the card would likly consume. 8pol =150W 6pol=75watt and over PCIe connector you have max another 75W by atx norm (some cards like dual GPU violate the norm - your kabelsystem should be preparred or you risk burning because the cables have not enough profil). - If you graphic card has for example like the reference model of a GTX 970 2 6Pol your card could consume up to ~225W max wihtout going over the standards.
So a Rig with a GTX970 (Reference) + i7 4790k is normaly
225W (GPU best to have a detailed oc power consumtion a custom build GTX970 Gigabyte Gaming 1 with 1 8Pol+16Pol+PCie would be 300W a Zotac AMP! Extreme with 2 8Pol 375W) +
154-83+138W (CPU OC 4,7Ghz) +
10% Equipment (like fans etc.) =
225+209+43,4=477,4W
So a 500W Quality psu do well to power up the Reference card. Most will go up to a 550W/600W psu for some safty fallback. But it is in not necessary, since you don't slay your pc with benchmark for cpu and gpu stresstesting and have max power consumption. Normal gaming is far less to this top cunsum case. A normal Rig nowaday consume most time aroudn 300W while gaming. I saw Rig with 970+Xeon and good 400W quality psu what did well and don't shut down. I would think it is a bit strange but ok it did well.
The OP with its
i5 3550 - would be somewhat 150W
the 280X Refrence Karts consume 257W (if he get a 280X VaporX it might could be more)
+10% Equipment
a 450/500W quality psu should do fine.
Edited by Kuritaclan, 13 January 2015 - 11:20 PM.