New PSU Needed - 8 pin PCI-E

[Westyfield2]

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.

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

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

 

[Westyfield2]

The TX750 is definitely 6+2. I have one.
I've no idea why the GX2 has to have a true 8-pin connector; I would've thought that a 6+2 would deliver the same power.

Damn, that's off the list then.

TY for telling me though!

 

[Westyfield2]

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.

http://www.corsair.com/products/hx.aspx says the HX620's got 2x 8 pin, but doesn't mention any 6 pins and the 9800 gx2 needs one of each

 

[Westyfield2]

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?

£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

 

[Westyfield2]

My Zalman (in siggy) has proper 8 pin pci-e and 6 pin connectors (1 of each). The 850w version has 2 of each. Cracking psu.

That's good to hear!
Just wanna check you mean this PSU as having 1x 6-pin & 1x 8-pin?

 

[Westyfield2]

Thanks for the detailed reply!

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.

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).

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.

So the 9800 GX2 doesn't need a 8pin, and a 6+2 is fine 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."

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.

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).

 

[Westyfield2]

Ordered a Coolermaster Real Power M700

Thanks for the recommendations guys