The PSU is listed under AMD/ATI supported PSU's - it is Topower, the HD 5770 min. requirement are 450w . Does the SB pull high wattage ?

See there's no way it could run. If the 5770 needs MINIMUM 450W, he's only got 70W left for everything else!

HD5770 uses 75w + the SB 75W that's 150W and if he upgrades to higher card than he would need to check the cards psu requirements, we always ignore the tiny bits other devices. http://www.amd.com/us/products/desktop/graphics/ati-radeon-hd-5000/hd-5770/Pages/ati-radeon-hd-5770-overview.aspx#3

Thank you guys, i just want to say it would be nice to hear some other opinions because i'm reading some reviews and they say the system peak consumption is under 400W, that's with OC ofc and with graphic cards that demands even more energy than mine.

SB draws relatively little power, and OCing adds maybe another 50WA 5770 is supposed to draw about 300W (total system) at full load. Add overclock and that PSU will be working at it's limit. If you want to take the risk go ahead, but if it fails and takes your motherboard or GPU with it, it will be much worse.Get a good PSU or you'll regret it sooner than later.

Thank you guys, i just want to say it would be nice to hear some other opinions because i'm reading some reviews and they say the system peak consumption is under 400W, that's with OC ofc and with graphic cards that demands even more energy than mine.

keep in mind that 1.- no matter what the sticker reads, your 29A 12V rail can't deliver more than 348W2.- that might not even be sustained wattage, but a peak value3.- you don't get a top of the line CPU and motherboard and run them with a crappy time bomb PSU like that

I'll take my chances, thanks for all the suggestions.

BTW, I don't want to sound obstinate or anything, it's just from my experience and from the experience of other people around me, i know this "crappy" PSU can do the job as i saw it many times handling more demanding systems than this one.No need to say i wouldn't be dealing with this if i would have enough money for a PSU upgrade, unfortunately, it is not the case.Regards.

BTW, I don't want to sound obstinate or anything, it's just from my experience and from the experience of other people around me, i know this "crappy" PSU can do the job as i saw it many times handling more demanding systems than this one.No need to say i wouldn't be dealing with this if i would have enough money for a PSU upgrade, unfortunately, it is not the case. Regards.

which model is it exactly? and is it a single 29A rail?

This is a hot topic for no reason. 500W:http://www.newegg.co...N82E16817139027 <--Similarly priced, just much better quality. 600W:http://www.newegg.co...N82E16817139023 650W:http://www.newegg.co...N82E16817139005 When in doubt, go with more power.

All these cos Asus, gigabyte , Asrock , MSI are good.

Never go for an Intel reference board I will add. Ugly and lack features.

The psu may be needed to be changed to a higher, else your system may become unstable if the power given gets less. But as you are already using the HD 5770 on that PSU and which is listed with ATI. But if you change to an Nvidia then better check the requirements for the nvidia card. I think your system should hold up, but avoid any overclocks on the gpu / cpu, even though the SB does not require much power. @dazz and other members who posted on this thread. The Topower is recommended by AMD/ATI.

The psu may be needed to be changed to a higher, else your system may become unstable if the power given gets less. But as you are already using the HD 5770 on that PSU and which is listed with ATI. But if you change to an Nvidia then better check the requirements for the nvidia card. I think your system should hold up, but avoid any overclocks on the gpu / cpu, even though the SB does not require much power. @dazz and other members who posted on this thread. The Topower is recommended by AMD/ATI.

do you have a link please?

do you have a link please?

dazz there http://www.amd.com/us/products/desktop/graphics/ati-radeon-hd-5000/hd-5770/Pages/ati-radeon-hd-5770-overview.aspx#3

I can see us getting a thread in a few months "New Sandy Bridge system not booting"