I have just upgraded the old warhorse with a couple of 750Ti's (replacing the previous 550Ti's).

I noticed that the 750's do not have the additional 12V power plug.

I'm just wondering if I'm putting my MoBo at risk of burning out the PCIE sockets. I've had this happen before with a GTX580 which DID have the additional power connected.

The board is an old Gigabyte P35 series, CUDA version 1.1.

According to GPUZ both cards are running at around 60% TDP.

The install was easy, apart from the new drivers all I had to do to make them work was rerun the Lunatics installer to upgrade to CUDA 5.

T.A.

I'm just wondering if I'm putting my MoBo at risk of burning out the PCIE sockets.

Only if it's a really, really, really crappy motherboard. And any failure would more likely be with the onboard power supply/regulators than the sockets.

According to GPUZ both cards are running at around 60% TDP.

Which would put them at less than 40W ea.

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Grant
Darwin NT

Thanks Grant, If I hadn't of burnt out that socket before I wouldn't even have thought of it. I just needed some reassurance :)

First impressions are quite good. The 750's seem to be twice as fast as the old cards, temps are ~20deg (C) lower and I only have to run the fans at 60% which make the room a lot quieter.

T.A.

Given that a PCIe x16 slot is rated for 75w the 60w cards should be fine. At least on paper. Whether or not the MB was designed to take a continuous load is a separate question.
If your P35 board is built anything like the P45 board I bought I expect it will be fine. You may even be pulling less from the PCIe slots than you were with the older 116w cards.

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SETI@home classic workunits: 93,865 CPU time: 863,447 hours
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Given that a PCIe x16 slot is rated for 75w the 60w cards should be fine. At least on paper. Whether or not the MB was designed to take a continuous load is a separate question.
If your P35 board is built anything like the P45 board I bought I expect it will be fine. You may even be pulling less from the PCIe slots than you were with the older 116w cards.

It should be ok. It ran 24/7 for 2.5 years with the 550's and before that ran 24/7 for 3 years with 2 GTS250's on board.

It's probably enjoying the holiday :)

T.A.

I swapped my 7 year old Windows XP machines like host 3751792 over to GTX 750 Ti cards back in April - and that's a heavily overclocked Gainward 'Golden Sample' with no additional power connector. No sign of any power problems, and I'm getting about four times the output for half the power consumption, compared with the 9800GT that was in there before.