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Trying to sell me a PSU?

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  • Graphics Cards
  • Power
  • Graphics
Last response: in Graphics & Displays
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August 16, 2012 7:14:03 PM

So I bought myself a PSU and I went to Maplin to get myself some PCI connectors and I asked the nearest guy from some advice , He started going on about how I needed a 700w PSU to power my HD6850 which I have heard can be powered with a recommended 500w PSU. Now I did tell him I was going to use 2 different cables to power my 2 PCI-E 6 pin card but even then? My PSU could easily put up with that at 580w? So He was either stupid / Trying to sell me a new PSU from that shop / Or just shouldn't be working there because of the lack of knowledge.

What do you guys think?

More about : sell psu

a c 109 U Graphics card
August 16, 2012 7:20:59 PM

Well this really depends on the SPECIFIC power supply.


But, that guy was trying to make you spend more money.
a c 273 U Graphics card
August 16, 2012 7:31:31 PM

You asked a Maplin employee for advice! :lol: 
a c 291 U Graphics card
August 16, 2012 7:36:34 PM

HD 6850 can be easily run off decent 430 watt power supply. That guy was definitely trying to fool you/had no knowledge about the subject whatsoever.

a c 205 U Graphics card
August 16, 2012 7:38:12 PM

If you bought a "580W" device with no PCIe power cables, then you bought an overrated, obsolete PSU-shaped object that is probably barely fit to power a few light bulbs; I believe Logisys and Sunbeam are among the purveyors of such items with that claimed wattage.
A 380W Antec Earthwatts or 430W Corsair Builder would be sufficient for a HD6850.
August 16, 2012 7:38:52 PM

amuffin said:
Well this really depends on the SPECIFIC power supply.


But, that guy was trying to make you spend more money.



Well he was trying to sell me one called G7 "Something something" 700W power supply. I think he thought I was stupid because I came in asking questions. I'm gettting a corsair CX600W for this setup

Phenom X4 II 940 @3.0Ghz
8GB Kingston
1TB HDD
HD 6850 1GB
a c 291 U Graphics card
August 16, 2012 7:41:33 PM

It will easily be enough :) .
August 16, 2012 7:47:59 PM

Mousemonkey said:
You asked a Maplin employee for advice! :lol: 



Well I had everything worked out! The HD6850 I bought was only supposed to have 1 PCI 6 pin , And me being a novice once this beast with 2 PCI 6 pin slots arrived I was confused! I only know the basics unfortunatly but I'll make sure to talk to you guys next time I need something since clearly Staff in maplin are useless!
a c 273 U Graphics card
August 16, 2012 7:48:09 PM

rEcR8Z said:
Well he was trying to sell me one called G7 "Something something" 700W power supply. I think he thought I was stupid because I came in asking questions. I'm gettting a corsair CX600W for this setup

Phenom X4 II 940 @3.0Ghz
8GB Kingston
1TB HDD
HD 6850 1GB

According to it's spec sheet that G7 780w PSU is a 600w with only 18A on the 12v rail.
August 16, 2012 7:48:45 PM

Onus said:
If you bought a "580W" device with no PCIe power cables, then you bought an overrated, obsolete PSU-shaped object that is probably barely fit to power a few light bulbs; I believe Logisys and Sunbeam are among the purveyors of such items with that claimed wattage.
A 380W Antec Earthwatts or 430W Corsair Builder would be sufficient for a HD6850.


You're right , That's why I've just ordered a Corsair CX600w :) 
a c 205 U Graphics card
August 16, 2012 7:52:00 PM

The Corsair should be fine.
I've seen a few cards lately (e.g. a XFX HD7770) that have two PCIe power connectors, when really only one should be needed. I'd avoid them if only because they were probably thrown together in haste, without proper optimization.
August 16, 2012 7:56:43 PM

rEcR8Z said:
So I bought myself a PSU and I went to Maplin to get myself some PCI connectors and I asked the nearest guy from some advice , He started going on about how I needed a 700w PSU to power my HD6850 which I have heard can be powered with a recommended 500w PSU. Now I did tell him I was going to use 2 different cables to power my 2 PCI-E 6 pin card but even then? My PSU could easily put up with that at 580w? So He was either stupid / Trying to sell me a new PSU from that shop / Or just shouldn't be working there because of the lack of knowledge.

What do you guys think?


In my personal opinion the #1 misconception with DIY desktop projects is how much power you need to comfortably run your system. So many people think you need 750W or 1000W PSUs to run modern hardware when that simply isn't true. I think 500W would run most everything, but I got a 620W SeaSonic to be safe.
August 16, 2012 8:00:02 PM

Onus said:
The Corsair should be fine.
I've seen a few cards lately (e.g. a XFX HD7770) that have two PCIe power connectors, when really only one should be needed. I'd avoid them if only because they were probably thrown together in haste, without proper optimization.


I read they are infact a better version than the normal 1 PCI ones because there used to be problems with the 1 PCI and too much power or something. whereas now the power is distributed properly into different areas making it easier to overclock or something :p 
a c 273 U Graphics card
August 16, 2012 8:10:21 PM

rEcR8Z said:
I read they are infact a better version than the normal 1 PCI ones because there used to be problems with the 1 PCI and too much power or something. whereas now the power is distributed properly into different areas making it easier to overclock or something :p 

No, it just means that the card requires more than 150w and is not as power efficient as some fanATIc's would like you to believe.
a c 291 U Graphics card
August 16, 2012 8:15:41 PM

Or it has more overclocking headroom :) .
a c 273 U Graphics card
August 16, 2012 8:20:09 PM

Sunius said:
Or it has more overclocking headroom :) .

That still requires more than 150w. :pfff: 
a c 291 U Graphics card
August 16, 2012 8:26:10 PM

Exactly my point. In many reviews I've read that Overclocking is limited by maximum power supplied through only 1 PCIe connector, and that it could go higher if it had power. They may have had that in mind by attaching 1 more connector.
August 16, 2012 8:37:50 PM

A 450W can power up on full load without any single issue the hd6850 .I am very sure for this
!