New PSU Needed - 8 pin PCI-E

Westyfield2

Westyfield2

Westyfield2

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Got a new system; Q6600, 4gb DDR2, OcUK 9800 GX2. and need a new PSU to power it all.

On the ocuk 9800 gx2 page it says:
finally 600w minimum for psu and 700w+ is recommended. also make sure your psu has true 8 pin pci-express connector rather than a 6+2 pin connector.
Click to expand...

so, what decent psu's are over 700w & have got 8 pin pci-e (as-well as 6 pin pci-e)?



i've found the corsair tx 750w and on corasir's website it says that it's got 4x pci-e 8 pin, but the picture shows a 6+2 pin connector :confused:

another psu for the same price is the hiper 880w hpu-4m880 and on Hiper's Website it says that it's got 4x PCI-E 6 pin, and 2x PCI-E 8 Pin. But toucam's post here "I personally would never touch OCZ, Hiper, Thermaltake with a stick and a condom on the other end." kinda put me off!

The final PSU I've found is the Coolermaster Real Power 700w and on the OcUK product page it says "Two 6 pin / one 8 pin PCI-e connectors". But that PSU is the least powerful of the three...



So, which of those three would you recommend? Or have I missed a better alternative?

TY
Ed
 
A Corsair HX620W is more than enough for you to run a single 9800GX2, if you're going to SLI it in the long run then a 750W will suit you better, otherwise don't bother! I personally would recommend Corsair TX650 this week offer at £55, it can handle up to 780W before protection kicks in. Not sure what nVidia and manufacturers are all about the need for "native" 8-pin PCIE connection.

Look here if you need more info:

http://www.hardforum.com/showthread.php?p=1032256489
 
although there is a link saying the 650 is £55 once its in your basket it's still £73. don't know if thats a error or just rubbish marketing.
Either way there should be no difference between a 8 pin and a 6 + 2 pin on the corsair series. I have a HX620 which has run that card without any problems.
 
Thermaltake ToughPower 1200W PSU have true 8 pin connectors, even my Enermax Galaxy 850W psu only have 6+2 connectors which wont fit the 9800 GX2 series of cards (it only fit if u mod the connector), which is a pain...

Regards
Maz


PS what wrong with Thermaltake psu?
 
Guardsmon said:
although there is a link saying the 650 is £55 once its in your basket it's still £73. don't know if thats a error or just rubbish marketing.
Either way there should be no difference between a 8 pin and a 6 + 2 pin on the corsair series. I have a HX620 which has run that card without any problems.
Click to expand...

http://www.corsair.com/products/hx.aspx says the HX620's got 2x 8 pin, but doesn't mention any 6 pins :confused: and the 9800 gx2 needs one of each :(
 
mazinger said:
Thermaltake ToughPower 1200W PSU have true 8 pin connectors, even my Enermax Galaxy 850W psu only have 6+2 connectors which wont fit the 9800 GX2 series of cards (it only fit if u mod the connector), which is a pain...

Regards
Maz


PS what wrong with Thermaltake psu?
Click to expand...

£176.24 for the Thermaltake ToughPower 1200W is a good bit more than the PSU budget allows! :(

Got any more details of modding it to fit 6+2? But I guess that would invalidate the warranty :eek:
 
Hello Westyfield2, a power supply such as the Corsair HX 520W ATX2.2 Modular SLI Compliant PSU would be more than sufficient for your system, unless you are looking to run a dozen hard drives as well. :p

Both Nvidia and AMD/ATI always recommend a higher wattage power supply unit for their top end products is to basically cover their selves. For example, if someone that isn't particularly in the know with what is what in regards to hardware and wishes to purchase the Nvidia 9800GX2 because it is big and shiny, it is very likely that they will also buy a very sub-standard power supply to run their new card. If this is the case, a 500 wattage sub-standard power supply may have some problems running the Nvidia 9800 GX2 as opposed to a 600 – 700 wattage power supply which should run the Nvidia 9800 GX2 fine. All though, I certainly wouldn't want to run any kind of system of a cheap, non-branded power supply unit.

Now, in regards to the connectors. The Corsair TX 750W ATX2.2 SLI Compliant PSU does indeed have the correct connectors - It has four 6+2 pin PCI-Express cables which will be absolutely fine for an Nvidia 9800 GX2 graphics processing unit. Though, in all honesty, unless you are looking at adding a second Nvidia 9800 GX2, you won't need a 750 wattage power supply unit.

Moving onto the Corsair HX 520W ATX2.2 Modular SLI Compliant PSU and the Corsair HX 620W ATX2.2 Modular SLI Compliant PSU. Now I am not completely sure that the above power supply units ship with the 6+2 pin PCI-Express cables. Though, if you do deice to purchase one of the above units and find that they don't come with the appropriate connectors, then you can email Corsair and they will ship the correct PCI-Express cables out to you. More information can be found here.

You may also be interested in this page here that talks about the problems with connecting the PCI-Express cables to the Nvidia 9800 GX2 - Which I believe, going from that link, the issues are now resolved. :)
 
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Thermaltake ToughPower 850w has two 6pin and 2x 8pin plugs.

Worked with my GX2 perfectly.

Using a tagan 600watt - it has 2x 6pin connectors so i'm using the BFG supplied 6pin to 8pin convertor with no problems. The 8pin thing is a bit of a myth TBH.

Not only that but i'm giving a Yesico 550watt fanless a go to see how that deals with my rig in sig. That PSU only has 1x 6pin and the rest are molex's. :eek:

Only doing it as i would really like to make the rig as quiet as possible.

gt
 
Thanks for the detailed reply! :)

Fire Wizard said:
Both Nvidia and AMD/ATI always recommend a higher wattage power supply unit for their top end products is to basically cover their selves. For example, if someone that isn't particularly in the know with what is what in regards to hardware and wishes to purchase the Nvidia 9800GX2 because it is big and shiny, it is very likely that they will also buy a very sub-standard power supply to run their new card. If this is the case, a 500 wattage sub-standard power supply may have some problems running the Nvidia 9800 GX2 as opposed to a 600 – 700 wattage power supply which should run the Nvidia 9800 GX2 fine. All though, I certainly wouldn't want to run any kind of system of a cheap, non-branded power supply unit.
Click to expand...

Yup, learnt my lesson many many years ago with cheapo PSU's! Last PSU I bought was a Seasonic S12 600w about 3yrs ago (still going strong).

Fire Wizard said:
Now, in regards to the connectors. The Corsair TX 750W ATX2.2 SLI Compliant PSU does indeed have the correct connectors - It has four 6+2 pin PCI-Express cables which will be absolutely fine for an Nvidia 9800 GX2 graphics processing unit. Though, in all honesty, unless you are looking at adding a second Nvidia 9800 GX2, you won't need a 750 wattage power supply unit.
Click to expand...
So the 9800 GX2 doesn't need a 8pin, and a 6+2 is fine :confused: That's the complete opposite of what OcUK say on the card's page but a reviewer does say "I read on Guru3D that some of the cards had a malformed 8-pin socket, and were incompatible with a large number of power supplies. Thankfully the card does not have that problem when paired with my Hiper 850w."


Fire Wizard said:
Moving onto the Corsair HX 520W ATX2.2 Modular SLI Compliant PSU and the Corsair HX 620W ATX2.2 Modular SLI Compliant PSU. Now I am not completely sure that the above power supply units ship with the 6+2 pin PCI-Express cables. Though, if you do deice to purchase one of the above units and find that they don't come with the appropriate connectors, then you can email Corsair and they will ship the correct PCI-Express cables out to you. More information can be found here.
Click to expand...
Yea I read something somewhere else saying about Corsair sending adapter cables, but I'd rather get a PSU that works out the box (got all the other bits here and will hopefully order PSU tomorrow for Friday delivery).
 
My Coolermaster M700 came with 2x6pin AND 2x8pin.

Nice and quiet and efficient. . I have not owned it for long enough to recomend without any reservations but am impressed so far:)

You cannot run 3/4 together , 2 only but can choose whichever ( I understand ) you want.

Am running a 9800GTX comfortably at moment but it was coping happily with 8800GT sli until I decided I was fed up of Sli and moved away.

Have not used with a 9800GX2 so cannot say it would work with such but I would not expect any problem. - They make 850w & 1000w in same series if you need to go for more power.:D
 
Ordered a Coolermaster Real Power M700

Thanks for the recommendations guys
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