GA-MA78LMT-S2 HD4890 compatability problem

[Dark Mantis]

Yes definitely requires both connectors to run.

[waynee]

no i always connect both its just the way it splits into 2 4pins. i thought if i connect them both to the same string of adaptors from the psu isnt that pointless in a way? why not just make it 6pin into 1 4pin?

[bytheway_r]

Ok, I've taken apart my case to check this myself. I have both 4 pins connected and they're in the same bundle of cables. More so, they actually turn into a single 4 pin later. However, you have to connect both 4 pin connectors as each supplies half of the 6pin connecting to the GPU.

Why it's a 6pin into 2x4pin? I'm not too good in this but I think it's better to use 2x3 out of 2x4 cables instead of somehow changing 4 cables into 6? Remember that with a 6pin to 1x4pin you'd be missing 2 cables ( or whatever's the name for this ).

Btw. I'm running OCZ StealthXStream 500W, too. It's working fine with a 4870 that, according to reviews, is one of the more power hungry versions. There's also an overclocked and unlocked Phenom II x3 720BE and 4GB of oc'ed DDR3. From what I know, this particular processor of mine is also rather needy in terms of power.

[Dark Mantis]

Actually the 4890 uses a 6 and an 8 pin connector which is why waynee has a six and two four pin connectors.

[bytheway_r]

Errr, you sure? I mean, here's a review of one:

http://www.guru3d.com/article/radeon-hd-4890-review-test/5

In the photo there're 2x6pin connectors and "Connect the two 6-pin PCIe power cables (it is required to connect them both). "

From what I know the 4890 isn't all that much different from the 4870? In my case, there's clearly 3 cables going out of each 4pin connector to the 6pin connected to the GPU.

[absic]

It depends which maker has produced it.
My Sapphire 4850X2 uses an 8 pin and a 6 pin and, I would assume as DM's GPU is also made by Sapphire they have followed the same format.

One of my friends has a generic ATI 4890 that only uses 2X6 pin.

[bytheway_r]

Well, alright, there are many different versions of GPU's out there so I'm not that surprised. The thing is, the OP has a 2x6pin card.

[Dark Mantis]

As you say it's irrellevant what my card uses (but I did check and it's a 6 & and there are many different makes with their own take on what is best.