do i need bigger psu? help!!

[nickolp]

5000+am2, asus m2n32sli deluxe
7950 gx2 gfx, 2gb ram
2x 250 maxtor, 250gb wd ext.
x-fi platinum,

psu is 550w, when overclocking 5000+ to 2.81 and 7950 core550, mem 1400, after these are applied the system reboots itself, in bios it says if power shortage reboot, is this the case? 4 fans run in the case(mystique 631) and gpu is 78 c at full load,

[jlreich]

Hi nickolp, and welcome to the PcGuide forums. :)

Did you mean 4000+?

It sounds to me more like you are OC'ing the CPU farther than it wants to go. If it's the 4000+ you have a pretty big OC on it already going from 2.0 to 2.81GHz.

Does it stop rebooting if you drop the clock speed down a little?

What brand and model is the PSU?

[nickolp]

it says on it hec 550 td, cpu is one of the new am2 chips x2 5000+ with a factory clock at 2.61, after doing the oc the system just keeps rebooting and an error message saying serious system faliure,
everything works fine at standard clocks, but wheres the fun in that, pc was bought through mesh 3 weeks ago.
oc ing the gpu and everything is fine running tittles such as fear and oblivion, it's only when i try and push the cpu a little, i've read that people have no trouble gettin cpu upto 2.9 ghz running very stable with stock cooler. to be honest i dont need the extra power but thats not the point, its nice to know it can if i do.
oh and thanks for response

[ErnieK]

To help you work out your power requirements go to the following link
http://www.pcpowercooling.com/technology/power_usage/

[mjc]

That's the thing with Oc'ing...no two chips/boards/etc will give the same exact results...

First, are you using the same exact rig as the guy who got to 2.9 gig? (including matching the CPU as closely as possible....)

Also, you should take it in steps to find out where stability is lost....is it at 2.62 or at 2.79 gig? Is it really the CPU that is now not stable or is maybe RAM?

There are way too many variables to say what is wrong if all you do is drop in the CPU and crank up the speed to what you think is may be able to handle...

[nickolp]

Manufacturer : OCZ
Part Number : OCZ2N9001G
Serial Number : Unspecified
Type : DDR2-SDRAM PC2-6400 (399 MHz)
Format : Regular UDIMM (133.35 x 3)
Size : 1024 MB (0 rows, 2 banks)
Module Buffered : No
Module Registered : No
Module EPP : Yes
Width : 64-bit
Error Correction Capability : No
Max. Burst Length : 0
Refresh : Reduced (.5x)7.8 µs, Self Refresh
Voltage : SSTL 1.8v
Manufacture : Week 1 of 2006
Supported Frequencies : 400 MHz
CAS Latency (tCL) : 4 clocks @400 MHz
RAS to CAS (tRCD) : 4 clocks @400 MHz
RAS Precharge (tRP) : 4 clocks @400 MHz
Cycle Time (tRAS) : 15 clocks @400 MHz
Min TRC : 22 clocks @400 MHz


my ram info for those what understand, i dont!, not much anyway but i'm learning.

when i add up power needs it comes to 583w as according to pcpowercooling, also when i do oc i am using the built in feature on mb A1 overclock(asus m2n32 sli deluxe) and an 8% oc is applied.
if 583w is the requirement i need surely a 10% cusion would of been more suitable, i will be contcting mesh if i get to the bottom of this.

thanks guys for all your help

[nickolp]

oh and just read, cpu shut down temp is 75 c, and at mo everything is standard, all i'm running is the net and temp is 51 c.

[mjc]

If everything is stock and your temp is 51 C, you need to get your cooling under control before you go off into OCland, because that is a bit on the high side for little or no load.

Low 40s or lower is what you should looking at for idle temps.

[jlreich]

Yeah you definitely need to get those temps down.

If you come up with 585w using the link Ernie gave then yes you do need more juice. I am not sure what the power requirements are for a dual core GPU is but I am sure it is high. If it really says you need 585W get at least 700W IMO.

I still think you are OC'ing too far though. As MJC said you never know what you are going to get out of any one CPU. They are all different in how far they can OC. And it isn't just the CPU but again as MJC said it is the whole system that comes into to play. Also if you are running on to low of a PSU it will make the system unstable, but it should only be unstable when you are pushing the whole system since it is a good PSU.

[nickolp]

thanks again guys, i will give your recommondations a go and let you know, spose this warm weather does not help, it must be 30 c in the room where pc is, so that can't help, roll on winter, Huh who am i kidding i'm a builder/joiner i love the sun shame pc dosn't,