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Plan on going Kepler, power efficient sure, too much for my current PSU?

post #1 of 9
Thread Starter 
Just read something posted by another OCN member, important bit is this:
Quote:
The interesting thing about electronics is that when they don't get proper power, they will try and compensate for this lack by drawing a heavier current. While a good power supply would help prevent this from happening, through regulation, a cheap 250W certainly isn't going to do this.

Which is something I didn't know, this was mentioned in the context in which it can cause permanent damage of the components, and this isn't the only way bad PSU's or just PSU's without enough wattage can cause damage to the pc components.

Reason for making this thread is concerned with my next GPU purchase.

(this bit isn't too important)
But I'll get to that in a bit. I purchased my current PSU about half a year ago when my last PSU (Trust 570W) was heavily malfunctioning, causing often shutdowns when even a minor fluctuation in the "current" (if that's the name) occurs, and started crashing (had about 3 years of usage on it) as well when I played some games (namely Skyrim). So I got my current one. Supposedly has 82% efficiency... meh. I'm not an expert when it comes to PSU's, but even I know it's not a quality PSU.

I'm planning on getting something like 660Ti or 670 and I was wondering will my current PSU be enough to "get by" with the current config and such GPU(s). Of course stock, and won't cause damage by itself in the fashion mentioned in the above quote or any of the similar type. Mostly because I buy GPU's every couple of years and I want to get the most out of at the moment of purchase, and I'm sure I can get a newer PSU few months after the purchase.

Thank you.
    
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post #2 of 9
Your 600w power supply? It should be enough for a 670 at least in terms of watts. There's an early review of the 670 showing the entire system only using 400W under full-load. That was with a single SSD though and minimal case fans, so the load would most likely be closer to ~500w-530w in a typical system with a couple fans and two HDDs. A 600w PSU from a respectable company would be fine, some random cheapo 600w might cause problems. Post the exact model that you own if you can.
Edited by SeanPoe - 5/8/12 at 8:53pm
post #3 of 9
Thread Starter 
Quote:
Originally Posted by SeanPoe View Post

Your 600w power supply? It should be enough for a 670 at least in terms of watts. There's an early review of the 670 showing the entire system only using 400W under full-load. That was with a single SSD though and minimal case fans, so the load would most likely be closer to ~500w-530w in a typical system with a couple fans and two HDDs. A 600w PSU from a respectable company would be fine, some random cheapo 600w might cause problems. Post the exact model that you own if you can.

Here it is.

EDIT: Also just found it's box, it's not 80% efficient "certificate", I misread it, it say (one the box), high efficiency up to 82%. tongue.gif

EDIT2: Also I wouldn't say it would necessarily use more, as they were using 3960X OC'd to 4.7 and Rampage IV Extreme
Edited by Goran H. - 5/8/12 at 9:41pm
    
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post #4 of 9
It's fine for sure in terms of total watts, what is worrying is it only has 23-25a on the 12v rail. Nvidia suggests at least 38 amps for a gtx 680 which has very similar power requirements as the 670 (same card basically). I've also never heard of that brand so it's most likely fairly low quality, you should probably go ask in the PSU section of these forums because i really don't know. If it was me, i'd just get a new PSU too. It's not worth the risk and you can get a quality 600w psu for about $50 from a reputable brand.
post #5 of 9
It's also not 80 plus certified so you'll be wasting money/electricity. According to this calculator, you'd save about $38 per year going from 70% efficiency to 90% efficiency. So a new PSU would pay for itself in the first year. So i'd definitely go for the upgrade if i were you.
Edited by SeanPoe - 5/8/12 at 9:59pm
post #6 of 9
Ok ignore everything that's been said so far.

Kepler is very power efficient, a typical 670Ti system will probably end up pulling less than 400W (it will show as higher than 400W in most reviews because they measure from the wall).

A 600W power supply is more than sufficient.

YOUR power supply in particular though is suspect and may be falsely rated. There's LC Power and L&C Power, the first is crap and the second is mediocre. I had an LC Power "450W"; I put it on the load tester and it burned at ~250W. A "600W" from them would likely crap out around 250-350W. You need a new power supply.
post #7 of 9
Quote:
Originally Posted by Phaedrus2129 View Post

Ok ignore everything that's been said so far.
.

I'm not really sure what i said that's incorrect. I believe it's exactly what you suggested. If you don't mind, can you point out my mistakes so i can learn from them for the future? thumb.gif
post #8 of 9
Thread Starter 
Quote:
Originally Posted by SeanPoe View Post

It's also not 80 plus certified so you'll be wasting money/electricity. According to this calculator, you'd save about $38 per year going from 70% efficiency to 90% efficiency. So a new PSU would pay for itself in the first year. So i'd definitely go for the upgrade if i were you.

Thing is I can't really order online for "numerous" reasons. And here besides offer being basically non-existing. Last time I checked (when I got this one) above this one they only had two Toughpower 650W and 750W and those were like priced in euros something like this. Price in dollars is price in euros here plus about 10% more... Thanks regardless, will look into one when we get here GTX670 which won't be for a month I gather.
Quote:
Originally Posted by Phaedrus2129 View Post

Ok ignore everything that's been said so far.
Kepler is very power efficient, a typical 670Ti system will probably end up pulling less than 400W (it will show as higher than 400W in most reviews because they measure from the wall).
A 600W power supply is more than sufficient.
YOUR power supply in particular though is suspect and may be falsely rated. There's LC Power and L&C Power, the first is crap and the second is mediocre. I had an LC Power "450W"; I put it on the load tester and it burned at ~250W. A "600W" from them would likely crap out around 250-350W. You need a new power supply.

That is really awful. Thanks for letting me know.
As a last resort, anyway I could test it on the spot, like let's say boot up furmark and prime95 and see if the system can handle it (if it won't damage my components in case of shutdown). And if so, for which amount of time. I'm asking because if possible, and it wouldn't damage my components, I'd certainly get better PSU in maybe two or three months after the initial GPU purchase... but at the time of purchase it means the difference of (blind guess) 25% of gaming performance and I'm not one of those guys that changes their GPU every generation...

If there isn't a way around it, sure I'll wait a bit and make a decent GPU+PSU purchase. Regards.
Edited by Goran H. - 5/8/12 at 11:17pm
    
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post #9 of 9
@sean

well, it wouldnt hike the power consumption from 400-500/530 with all the added bits. 400w is alot of power and i dont think even a 680 would consume that much. also, the amperage requirement is quite general and is meant for the entire system, so its going to be heavily overstated so it can account for people with really hungry cpus. it works out to be 450w anyway which is plenty for a system like that
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