PSU Help????

[max_snyper]

hi max here again.....
i think tomm. i'm gonna purchase a sapphire hd3870 512mb with it should purchase a new psu or should i go with my old psu (iball lpe223-400)400w
i would like to purchase a good psu(400w) near Rs.1k-1.5k can nebody
suggest a new PSU......

[sagargv]

cooler master 600w - 3.5k
corsair vx450w - 3.9k

[ionicsachin]

Corsair CMPSU-450VX for around 3.5k
been using it since 1 week on my rig and its great....
PSU is one of the important part deciding ur pc's health and stability so dont compromise....

[BSOD]

I have been using VIP 450W, it is great and also fits cleanly into the budget.

[john_the_ultimate]

+1 for Corsair VX450W but if its over your budget then settle for coolermaster atleast.

[pratik03]

for HD3870 you at least require coolermaster extreme power plus 500w 2.8k

[adithyagenius]

Dont get cm xtreme power series. They are inefficient and contribute to electricity bills. corsair vx 450 is good.

[ancientrites]

1000-1500 budget i can think of powersafe 400watts smps.

[Revolution]

Hey,
Do anyone know the price of
Powersafe 400W Silver/Gold and VIP 450W in Kolkata ?
And where can I get those PSUs in Kolkata ?
Thank you.....

[pratik03]

Originally Posted by adithyagenius

Dont get cm xtreme power series. They are inefficient and contribute to electricity bills. corsair vx 450 is good.

coolermaster extreme 500w has 70%+ efficiency only 10% less than vx450w and it will cost 1k less than vx450w.

having efficiency more than 70% is not inefficient.

[adithyagenius]

Originally Posted by pratik03

coolermaster extreme 500w has 70%+ efficiency only 10% less than vx450w and it will cost 1k less than vx450w.

having efficiency more than 70% is not inefficient.

It doesnt matter if PC's contribution electricity bill is less. Extreme power causes the bill to raise by 14.3% from vx450. In metros like hyderabad it will lead to 2.5k+ electricity bill increase for 2 years. Hence 1k is worth it.

[pratik03]

Originally Posted by adithyagenius

It doesnt matter if PC's contribution electricity bill is less. Extreme power causes the bill to raise by 14.3% from vx450. In metros like hyderabad it will lead to 2.5k+ electricity bill increase for 2 years. Hence 1k is worth it.

2.5k+ increase/2years

how did you calculate this ?

[sagargv]

mostly he took 14.7 % extra for the entire bill instead of taking only the electricity consumed by pc.

[adithyagenius]

^^ reread my post. it contains the words "PC's contribution electricity bill"
my pc is a pentium d820 + single ddr2 400 mhz stick + 160gb sata + 7600gt which 232w at full load and 197w at idle. When I bring home my computer from hostel our electricity bill jumps by around rs 900/month. This I know because my father shouts about this everytime I come home. I have checked the trend too. I am assuming people to use their computer less than me. So lets call it Rs 750. For 2 years thats 24*750=18k. 14.3% of it is 0.143*18=2.574k. But I still want to round it down to 2.5k for making it as small as possible. But actually for me its 900*24*.143=Rs3088.
My house bill is only 600 pm when I and my computer are not present. No TV, no ACs. Only tubelights, worldspace and fridge. But for people who have ACs and heaters, the electricity consumption will push the billing to higher slab rates. This can make it even 6k for high electricity bill payers.
I do my calculations before buying a psu.

[pratik03]

Originally Posted by adithyagenius

^^ reread my post. it contains the words "PC's contribution electricity bill"
my pc is a pentium d820 + single ddr2 400 mhz stick + 160gb sata + 7600gt which 232w at full load and 197w at idle. When I bring home my computer from hostel our electricity bill jumps by around rs 900/month. This I know because my father shouts about this everytime I come home. I have checked the trend too. I am assuming people to use their computer less than me. So lets call it Rs 750. For 2 years thats 24*750=18k. 14.3% of it is 0.143*18=2.574k. But I still want to round it down to 2.5k for making it as small as possible. But actually for me its 900*24*.143=Rs3088.
My house bill is only 600 pm when I and my computer are not present. No TV, no ACs. Only tubelights, worldspace and fridge. But for people who have ACs and heaters, the electricity consumption will push the billing to higher slab rates. This can make it even 6k for high electricity bill payers.
I do my calculations before buying a psu.

I didn't ask what is your PC's contribution in electricity bill.

Originally Posted by adithyagenius

Extreme power causes the bill to raise by 14.3% from vx450. In metros like hyderabad it will lead to 2.5k+ electricity bill increase for 2 years. Hence 1k is worth it.

just explain above statement & after replacing coolermaster extreme with coarsair vx450w (keeping other pc config same) what will be the total saving.

[adithyagenius]

I mentioned my PC config because its very basic with gfx lower than 3870. So any other system with modern gfx should generally save even more. I have already mention that its estimated at 2.5k+ for my system in two years. So power saving for thread starter's system would be higher assuming similiar slab rates and usage. I can't get clearer than this.

[dOm1naTOr]

I think 70% on a 600W PSU[CM EP 600 @ 3.5k] is goin to be much better for the PC than 80% effiency on a 450W PSU[Corsair]@ 3.9k.

Maybe electicity bill will be more[ not sure how much], but if u later plan to add more stuggs like HDDs, ODDs, sound card, lan cards etc, then 600W CM wud be fine.

[john_the_ultimate]

VX450 is better than CM 600W and the extra bucks you pay helps a lot in long run. Also there are ample connector for upgrades. to pe precise 1x ATX 24pin, 1x 8-pin EPS, 1x 6-pin pci-e, 6x SATA, 6x molex, 2x Floppy.
And for info CM 600w is actually Seventeam 500W.

[sagargv]

Originally Posted by adithyagenius

^^ reread my post. it contains the words .......... So lets call it Rs 750. For 2 years thats 24*750=18k. 14.3% of it is 0.143*18=2.574k. But I still want to round it down to 2.5k for making it as small as possible. But actually for me its 900*24*.143=Rs3088.
.

you mean to say that ur pc consumes power worth 750 bucks per month . . do u run ur pc for 24 / 7 with the monitor on .. the power consumption of only the pc will amount to about 750 bucks if the pc is consuming about 300watt continously for 24 hrs * 30 days. .

[adithyagenius]

^^ BSNL 900 plan back then ....
and you must have calculated 300watts from lower slab rate.

[pratik03]

300 watts power consumption is not only because of your psu alone there are other factor affects this such as your monitor & ups system. CRT monitors are more power hungry consumes more than twice the power of lcd monitor. also pc+ups consumes more power than the pc alone

so you can't conclude that because of psu having 10% lesser efficiency than other psu will lead to 2.5k+ electricity bill increase for 2 years

[sagargv]

but what aditya is saying is rite , if u are using ur pc for 24hrs for all the 365 days. . .if the pc consumes about 700 bucks worth power a month . 10% will be quivalent to 70 bucks a month which in 2 yrs will come to about 1700 bucks ..

but i think most of us dont use pc for 24 hrs a day. . we may use it for max of 7-8 hrs ... so in 2 yrs , we may save about 600 bucks . .further , this is based on the assumption that pc ( excluding monitor , speakers . . just the components which get power from psu ) consumes 300W which i think is not likely to be the case .. i dont think anyone will use pc at full load for 24 hrs * 365 days. . idle pc( only those components which draw power from psu ) power consumption with today's tech will be much less than 300W . and only those pc's using high end cards end up with full load power of near 300W .most mid end users remain in the rage 200W at full load.

bottomline , i dont think we save much by choosing vx450W over CM 600W just taking efficiancy into account. ofcourse , i'm not saying that CM 600W is better ..

[pratik03]

Originally Posted by sagargv

bottomline , i dont think we save much by choosing vx450W over CM 600W just taking efficiancy into account. ofcourse , i'm not saying that CM 600W is better ..

thats exactly what i want to say

[dOm1naTOr]

nicely said sagargv
+1
And i doubt if the 450W Corsair can handle HD 3870 and a powerful proccy at oced conditions and some extra devices too like 2~3 HDDs nd ODDS.

Though theoritically CM 600 has 10% less efficiency than VX450, the avg power output from a 600W PSU @ 70% efficiency will handle such loads better.
The VX 450 dun seems to justify the price for a 450W PSU. There are many gud PSUs from CM, Antec, VIP etc with much higher power rating nd lower costs. But the VX 450 is real gud compared to other 450W PSUs not considering nyones prices.

[acewin]

ok, addin to the discussion because it is for PSU, guys when we generally buy a cabinet in it also a SMPS is alreay provided, what will happen of it.
Because certainly high end proccys are more in power reqs. I have been generally using systems in which I havent added any good PSUs, and run DG33 with 6750 C2D proccy. But didnt add any PSU in it.

[adithyagenius]

@sagarv, i dont know why you used 10% of electricity bill as saving. You should NOT use directly the difference of efficiencies to calculate difference in power draw. check the graphs of vx450 and the psu to find efficiency values at your cpu loads. The formula would be (efficiency of vx450 * electricty bill / efficiency of whatever psu)-electricity bill.
I also used to switch of monitor and speaker when downloading or away. But I used to game for 4-5 hours. The fact that 3870 system would draw more power than my setup which is too basic (first dual core ever) also would mean that 50% of usage as me would also lead to 2.5k+. This 2.5 times the price difference. so even if its further reduced 2.5 times and both are cost same in the end still it will be better to buy vx450 for silence and not contributing to global warming.

[sagargv]

ok . lets say the components inside cabby drawing power from psu , draw about 300W ( assuming u have a 3870 and u're running full load ) . so a 70% efficient psu will consume 428watt to give 300watt output . a 80% efficient psu will consume 375 watt .. . so the difference is 53 watt .

1 unit = 1 kilo watt hour . lets take 1 unit = 3.6 rs. ( i'm not sure if i'm rite here ) . .. then in one year , by choosing vx450W , we'll save 1600 bucks in ONE year. . ok , i stand corrected. But still this is based on the assumption that u're pc continuously consumes 300watt power . .

if u used ur pc for only 8 hrs a day . savings will drop to 600 bucks a year. .