Can my 300w power supply run a GTX650?

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ZeFalkon

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May 25, 2013
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For quite a while, I have been running a GT630, which was fine for most games. When I first assembled by computer, I tried to be cost-effective, which made me buy a 300w power supply. Now, I decide that I should go get a GTX 650 so I can play more modern games effectively. I first realized that the GTX 650 needed a 6-pin adapter, but I found out that the power supply did in fact have a 6-pin. I was ready to buy it, before I realized that I better check how much watts my power supply is. To my dismay, it was 300 watts (400w is minimum for GTX650 according to Nvidia). I was wondering, would it be alright to run a GTX 650 on a 300 watt power supply that has a 6-pin?

My Specs (In case you need them)
AMD FX 4130
8GB RAM
500GB Seagate Harddrive
300w Power Supply
Nvidia Geforce GT630
 
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if it is a generic piece of garbage, try it out, the worst that can happen is the psu will crap out, if it is name brand (Antec, Corsair, Seasonic, etc) it should work fine. Also, i like this design: http://www.newegg.com/Product/Product.aspx?Item=N82E16814121710

If you ever need a PhysX chip, this one does not use a 6-pin, it uses power straight from the mobo, so if you get, say a GTX 860 (complete speculation) down the road, you only need a psu with 2x 6-pins (or however many your future chip will need) and enough power (probably around 500-550w) to run both cards.
 
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I would not recommend that you use a 300w PSU with a 400w recommended graphics card. It would most likely not get into windows and even if it did games would either not run or your voltages would be spiking all over the place. In other words, it could cause damage to other components in your system.

The best thing you could do would be to save that power supply for a low power system like a media center PC and get at least a 400w PSU.

this is the best deal you could get on a 400w psu, but remember that this is another bargain unit.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817182074
 
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"the worst that can happen is the psu will crap out" actually the worst thing that could happen is this http://www.theregister.co.uk/2012/11/26/exploding_computer_vs_reg_reader/ along with damaging everything the psu is connected to. In other words never skimp on your power supply.
 
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Normally, a 300W PSU is not recommended for the GTX 650 when it nears its max demand. But that depends on the PSU. And on its ratings. What is your PSU make/model? The GTX 650 demands 64W at max. That relates to 5.3A from the +12V rail. http://www.hwcompare.com/13457/geforce-gtx-650/

You can run your system thru a PSU calc to see what is reommended: http://www.extreme.outervision.com/psucalculatorlite.jsp

If your PC shuts down or restarts during heavy use, that would be an indication that the PSU can't keep up.
 
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Thanks to all of you guys. What I am really concerned with is my CPU. The Bulldozer AMD CPUs are extremely power hungry (My CPU uses around 198watts for peak power consumption). Will that mean I should spend some money and get myself a 400watt power supply?
 
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What Card? What CPU is in your CompaQ?

I couldn't find any specs on the PSU in the PDF file. The important spec would be the +12V Rail(s) amp rating, and the manufacturer of the PSU. All the power for the card is provided by the +12V rail, and some manufacturers over rate their PSUs.
 
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Well i want to get the 2 gigabye of this model
I have a core 2 quad q8400
The power supply says its hp and it says 100
-240V - 5.5A - 50-60Hz
320w max
+12.1 Vmain (3 little lines with a long line over it)/16A Max + 12.1Vcpu (3 little lines with a long line over it)/14A max
-12v (3 little lines with a long line over it)/ 0.15A Max +12vsb (3 little lines with a long line over it)/1.3A Max

+12.1 Vmain & +12.1 Vcpu SHALL NOT EXCEED 320 watts
 
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That card ( http://www.newegg.com/Product/Product.aspx?Item=N82E16814121714 ) would be perfectly acceptable to use with that PSU. The GTX 650 is a 64W card maxed out. It gets all its (+12V) power from the PCIe X16 slot which is rated at 75W (6.25A) capacity. And your PSU appears to be a capable 300W- 350W unit. HP (Compaq) generally uses good quality PSUs.

That card and the AMD HD 7750 ( http://www.newegg.com/Product/Product.aspx?Item=N82E16814161427 ) are the best cards to get that don't require an aux power cable to feed it.

Btw, does your PSU have a 6/8 pin PCIe power cable lying unused in the case? If so, you could even bump up to an HD 7770 if you wanted to. It is a 80W card that will require 6.7A from the +12V rail. http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&N=100007709%20600298539&IsNodeId=1&srchInDesc=hd%207770&ActiveSearchResult=True&Order=PRICE&Pagesize=20
 
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Unfortunatly it didnt my original thought was a 7770 7850 or a 650 ti but it didnt have a 6 pin or 8 pin
 
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Then, you are better staying with the GTX 650/HD 7750.

However, in the case of the HD 7770, since it is only an 80W card and you have ~30A of +12V capacity, you could use a twin Molex to PCIe adapter if you have 2 x Molex available.
http://www.amazon.com/HDE-PCI-Express-Pin-Molex/dp/B002CZANA8

Just a thought.
 
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I had the same thought 😛 but i dont have molexs i do however have a extra sata lying in there do you think one of these would work http://www.amazon.com/Branded-8inch-15pin-Express-Power/dp/B005NJXY7O/ref=sr_1_2?ie=UTF8&qid=1385294739&sr=8-2&keywords=sata+to+6+pin+pcie+adapter
Oh and is there anyway to actually monitor how many watts my pc actually uses from the power supply
 
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That SATA to PCIe adapter is the first I've seen. Usually we don't like to use a SATA daisy chain for GFX cards because the SATA daisey chain is of smaller gauge wire that the Molex daisy chain and the connector is not designed for the current necessary. But in the case of the 80W HD 7770 it might be acceptable.

The best way to see the total wattage consumed by the PSU is to plug one of these between the outlet and the PSU cable: http://www.amazon.com/P3-International-P4460-Electricity-Monitor/dp/B000RGF29Q

Btw, it would be better to start a new thread rather than hijack another's ;-)
 
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Saw this discussion some days ago when I had a problem with my new GTX650Ti (Gigabyte's edition) causing a freeze at the Windows startup logo. My resolution may be of use to others:

My backup machine is about 6 years old, dual core E6550 32bit Intel with 2G Ram, so very tame by today's standards, but wanted a better card for games. My PSU is 450W, so thought the GTX650Ti it should work, but according to the sticker on the PSU I only have 14A on my 12V line, which is below Gigabyte's 20v recommendation (couldn't find the 12V info on nvidia's or Gigabyte's specs pages, but on the side of the box!). Anyway, after several frustrating days as we all do trying to isolate the problem, all roads led to being the PSU. So the options were to either buy a downgraded card (or try to convince the dealer to swap - hah) or upgrade the PSU. Saw lots of recommendations for high powered PSU's but wasn't looking forward to doing that kind of a change (not an experienced PC mechanic by any means).

However, while starring into the old box wondering what I should do next, I saw that I still had a left-over dial-up LAN card, a floppy drive, and the original boot drive that I replaced with an SSD but never physically removed. As these were all still plugged in they were probably sucking power for no good reason, or possibly creating some obscure driver/config conflict. After removing them I re-installed the GTX650 drivers and things have been working fine for a couple of weeks, and enjoying super graphics on NFS and World of Tanks pretty much at maximum. So my tip for this kind of problem is to remove any obsolete parts from your box and maybe you'll get lucky like me.
 
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If you have your FX processor O/C'd to the point it is consuming 198W of power, it is overloading the (normally) 125W socket, not to mention the 125W TDP CPU itself. What MB do you have? And how high do you have it O/C'd?
 
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I have an example saying that u all will need a good psu. My psu was 350w coolermaster gx which completly toast my hd 7770.at first my pc start beeping while ignore that and after few days it starts giveng worst lags in ervery game even in igi.then it finally toast my card.luckily i has more two year guarenye in 7770.and i buyed 500w psu.and it works fine
 
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I havees a problem
I orederd an Asus Gtx650-E-1GD5 And it arrived today from amazon.
I opened it up ready to put it in and when i did nothing happened
The computer would boot up but the cards fan stood still and only the on-board graphics were operational.
Anyone know why?
 
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I Got it work some days ago. I had to unplug the computer and press power button to drain before i installed.
Which i forgot to do the first time and could have screwed up the card...
As for the 6 pin it doesnt have one 😀 its the Asus GTX650-E-1GD5 no 6 pin connector
 
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I've never heard of anyone having to do that before. But as long as it is working for you, all's well that ends well.

And yeah, I forgot you were going to get the GTX 650 that didn't require aux power.
 
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Unplugged

Easy graphics card upgrades using only motherboard power
Attain better graphics without the messy cables or buying a bigger power supply. GTX650-E-1GD5 gets all its power directly from the PCI Express slot, leading to a neat yet capable graphics configuration.

http://www.asus.com/Graphics_Cards/GTX650E1GD5/
 
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