- Mar 11, 2015
- 4
- 0
- 4,510
Hi all,
System spec is as follows:
HP P6740uk running 64bit Window 7.
Processor: AMD Athlon II X4 640, 3000Mhz (4 cores)
8GB of RAM (2 x 4GB)
1 x 1TB HDD
1 x CDRW
1 x Multicard reader
OEM PSU is a Deltec 300W max unit (Continuous power is rated lower)
It had a Geforce 405 card which was weak. Having read the requirements for a stock GTX 750Ti, I went and bought the small EVGA OC version (no 6-pin so all power drawn from the PCIe slot 75w Max). After purchase the EVGA instructions stated 400W and 20A on the 12v rail. (Too late!) My stock PSU is 300W max and only 18A on the 12v rail BUT, there's not much else in the machine drawing crazy power demands.
The machine copes well and I've stressed it for weeks now using Heaven Benchmark and get a nice 55FPS on high - super stable. I've also played games for hours on end with great results and overall I'm happy.
This makes me think that the manufacturers do over-stipulate the PSU requirements. Obviously Deltec make some nice OEM PSU's and I can understand companies like NVidia may over-estimate to give the user huge headroom on weak PSU's on the market that aren't capable of sustaining stable continuous power at high loads.
ANYWAY.....
I may be able to get hold of GTX 780 and so wanted to get a more powerful PSU.
Would the EVGA 500W 80+ Bronze be fine to use seeing as my CPU and other accessories are relatively low power?
http://www.evga.com/Products/Product.aspx?pn=100-W1-0500-KR
The GTX 780 spec states 42A and 600W minimum but there's not a chance in the world that card draws probably even half of that much demand on it's own.
There is a video on YouTube with a guy demoing a Corsair 450w with an even more capable Ti version the GTX 780 on an i5 with an SSD, 2 x HDD and loads of fans and stressing it along with all his other components was drawing 400W from the wall MAX. I would take an educated guess that my system would draw a mere 350W max from the wall - probably less. Take into account the loss of 20% efficiency at the PSU and that puts me at 420W max.
Any thoughts welcome.
System spec is as follows:
HP P6740uk running 64bit Window 7.
Processor: AMD Athlon II X4 640, 3000Mhz (4 cores)
8GB of RAM (2 x 4GB)
1 x 1TB HDD
1 x CDRW
1 x Multicard reader
OEM PSU is a Deltec 300W max unit (Continuous power is rated lower)
It had a Geforce 405 card which was weak. Having read the requirements for a stock GTX 750Ti, I went and bought the small EVGA OC version (no 6-pin so all power drawn from the PCIe slot 75w Max). After purchase the EVGA instructions stated 400W and 20A on the 12v rail. (Too late!) My stock PSU is 300W max and only 18A on the 12v rail BUT, there's not much else in the machine drawing crazy power demands.
The machine copes well and I've stressed it for weeks now using Heaven Benchmark and get a nice 55FPS on high - super stable. I've also played games for hours on end with great results and overall I'm happy.
This makes me think that the manufacturers do over-stipulate the PSU requirements. Obviously Deltec make some nice OEM PSU's and I can understand companies like NVidia may over-estimate to give the user huge headroom on weak PSU's on the market that aren't capable of sustaining stable continuous power at high loads.
ANYWAY.....
I may be able to get hold of GTX 780 and so wanted to get a more powerful PSU.
Would the EVGA 500W 80+ Bronze be fine to use seeing as my CPU and other accessories are relatively low power?
http://www.evga.com/Products/Product.aspx?pn=100-W1-0500-KR
The GTX 780 spec states 42A and 600W minimum but there's not a chance in the world that card draws probably even half of that much demand on it's own.
There is a video on YouTube with a guy demoing a Corsair 450w with an even more capable Ti version the GTX 780 on an i5 with an SSD, 2 x HDD and loads of fans and stressing it along with all his other components was drawing 400W from the wall MAX. I would take an educated guess that my system would draw a mere 350W max from the wall - probably less. Take into account the loss of 20% efficiency at the PSU and that puts me at 420W max.
Any thoughts welcome.
) And, at 90% load it will only use 398 W. Which means a true 500W PSU will be more than enough. 
Facebook
Twitter
Instagram