Building new PC, PSU/GFX cable issue

chown · 16 Jul 2013 at 14:19

Good Afternoon guys,

This morning I got my new bits and pieces from ocuk,

.

£184.99 x 1 - MSI HD 7950 OC BE 3072MB GDDR5 PCI-Express Graphics Card (R7950-3GD5OC BE G)
£154.99 x 1 - Intel Core i5-3570K 3.40GHz (Ivybridge) Socket LGA1155 Processor (77W) - Retail
£129.99 x 1 - IIyama Prolite E2473HS 24" Widescreen LED Monitor - Black
£69.99 x 1 - SanDisk Extreme SSD 120GB 2.5" SATA 6Gbs Solid State Hard Drive - (SDSSDX-120G-G25)
£66.66 x 1 - Microsoft Windows 8 64-Bit DVD - OEM (WN7-00403)
£62.46 x 1 - MSI Z77A-G43 Intel Z77 (Socket 1155) DDR3 Motherboard
£49.99 x 1 - Thermaltake Smart M550W '80 Plus Bronze' Modular Power Supply
£36.66 x 1 - Crucial Ballistix Sport 8GB (2x4GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit (BLS2CP4G3D1609DS1S00CEU)
£27.49 x 1 - Xigmatek Asgard Pro Gaming Case - Black
£14.99 x 1 - TP-Link 300Mbps High-Gain Wireless-N USB Adapter (TL-WN822N)
£14.16 x 1 - OcUK 20x DVD±RW SATA ReWriter (Black) - OEM
£0.00 x 1 - AMD Reloaded - Tomb Raider - AMD Promotions ONLY
£0.00 x 1 - AMD Simcity Vouchers
£0.00 x 1 - Dirt Showdown PC Game - Download Voucher Code from AMD
£0.00 x 1 - Shogun 2 Total War Game Voucher
£0.00 x 1 - AMD Never Settle Bundle - FARCRY3 PC Game FREE with qualifying AMD HD 7770 Graphics Cards - Voucher
£0.00 x 1 - AMD - Sleeping Dogs PC Game FREE with 78xx & 79xx series Graphics Cards - Voucher

Not having much building experience (that's recent) i've been taking it slowly.

Have come to a small snag however for linking the psu to the gfx card. Basically the supplied thermaltake pci-e cable has;

1x6 pin (has to be connected at the psu side)
and for the card side it has;
1x6 with loose 1x2 pair
1x8 block

The connections for the msi9750 are two blocks of 6.
Hopefully the a picture explains it better.

Similar issue to this thread here on ocuk but I have a single block of 8 rather than 2x 6+2 connectors to contend with.

So;

o do both gfx card connectors need to be used i.e. use 1x 6+2 (i think so and other thread indicates so)

o do I need an adaptor (8 -> 6+2)

o do I use a pair of snips and 'disconnect' the last block of 2 I don't need and connect it that way

o Am I missing something completely obvious/have I bought the wrong kit

many thanks for any help, desperate to get it booted up. I havn't had a dedicated gfx card for a very long time !

Sprite · 16 Jul 2013 at 14:39

Yes you will need to use both PCI-E connectors. Will the 8 pin block not fit in the furthest slot (obviously it will overhang between the two connectors)?

chown · 16 Jul 2013 at 15:30

I did briefly try this but couldn't get the block pattern to match up (squares, circle things) where I needed the extra two in the overhang area.

I did get a 6 pin to molex (with the gfx card) and a strip molex female to 6 pin (with psu) but I don't know if this is a good idea or if it would work at all.

Seemingly I can get 6/8 pin converter which may be best though I am slightly annoyed as I'm wondering if my PSU is good enough (I had seen it quoted on slightly higher specs than mine) :confused:

ExRayTed · 16 Jul 2013 at 21:46

The PSU should be fine and the molex to 6 pin PCI/E will be fine too.

MatsyLR · 17 Jul 2013 at 00:21

The PSU is fine, its just not compatible with some GPU's in your case its not.
Just use the adapters, thats what they are for

oldestgregg · 17 Jul 2013 at 02:35

No harm in asking as it often saves problems down the line but that one always makes me laugh....."should I use this adapter that is supplied with xxx".....they wouldn't include it if it wasn't OK to use

chown · 17 Jul 2013 at 10:46

Haha, thanks guys, the molex strip did indeed work. Benchmarking and testing now.

My initial hesitation was due to me lumping those cables together with the mobo ones