Overclocking a GPU with no PCI-e connector?

Gilbertify · Aug 7, 2016

Someone told me it was a bad idea? I don't understand why. I want to overclock my Zotac GTX 750 ti. It has no PCI-e connector on it.

Also, I'm using a stock cooler but i'm sure that's fine.

Anyway, my main concern is the fact that the GPU doesn't use a PCI-e connector. Will it be fine?

Dunlop0078 · Aug 7, 2016

Yeah overclock away. The 750 ti is a low power card the pcie slot should be able to supply plenty of power for that card even overvolted and overcloked at any level msi afterbuner or other overclocking software will allow, I don't believe the 750 ti stock bios will allow you to overvolt it very much anyway.

Gilbertify · Aug 7, 2016

Dunlop0078 :

Good to know! I'll have to try it out then! Thanks! I'll just give the card an all around small boost to the clocks and voltage.

Dunlop0078 · Aug 7, 2016

Gilbertify :

I would increase the core clock in 30mhz or so increments stress test to see if its stable then repeat until it crashes, back off the core clock a bit make sure its stable and you should be good to go. Here is a good video on it.

https://www.youtube.com/watch?v=vUEMS-B1Siw

Shaun o · Aug 7, 2016

Gilbert,

Some 750 Ti cards do come with a 6 pin 12v Pci-e power connector.
Then there are other models, or brands of 750 ti cards that don`t have them.

Th reason why someone warned you not to try and overclock your 750 ti card.
Is because when you have the eight pin 12v E-atx, or 12v Eps power connector from the psu connected to the motherboard.

Four of the pins out of the eight you plug in provide extra power to the Pci-e card slot of the motherboard, and also extra power for the cpu fitted in the socket of the motherboard.

The amount of power the four pins out of the eight of the connector provide around 75w of power to the Pci-e card slot.
If a graphics card tries to draw more than 75w of total power from the Pci-e card slot of the motherboard.

It can damage, or overload the, 12v E-atx, 12v Eps power connector of the motherboard or, it can lead to the wires of the power block getting very hot to the point of melting.

If you intend to overclock the 750ti card as you say, and it does not have a six pin 12v Pci-e power connector block to the card.

Keep a close eye on the eight pin power block connected to the motherboard for 12v E-atx, 12v Eps power to the board.

Other than saying Yes it will work, I have seen it happen where when too much power by a graphics card is demanded
Due to the power draw cables start to heat up.

If smell any sort of plastic burning smell while overclocking the 750 ti card. Turn your system off.
And inspect the 12v E-atx connector on the motherboard.
And stop any overclocking of the 750 Ti card.

It greatly depends on the motherboard you are using, if it was around the £50 price when you bought it or less.
Then keep a close eye on the E-atx.

If the motherboard is in the £100 range or more, then it may be completely alright.

Dunlop0078 · Aug 7, 2016

The stock bios will only allow you to overvolt 12mv and I dont think the power limit can be changed at all so I highly doubt any overclock with the stock bios will cause that card to pull more than 75watts from the pci slot. Toms max was 68watts.

Gilbertify · Aug 7, 2016

Shaun o :

Gilbert,

Some 750 Ti cards do come with a 6 pin 12v Pci-e power connector.
Then there are other models, or brands of 750 ti cards that don`t have them.

Th reason why someone warned you not to try and overclock your 750 ti card.
Is because when you have the eight pin 12v E-atx, or 12v Eps power connector from the psu connected to the motherboard.

Four of the pins out of the eight you plug in provide extra power to the Pci-e card slot of the motherboard, and also extra power for the cpu fitted in the socket of the motherboard.

The amount of power the four pins out of the eight of the connector provide around 75w of power to the Pci-e card slot.
If a graphics card tries to draw more than 75w of total power from the Pci-e card slot of the motherboard.

It can damage, or overload the, 12v E-atx, 12v Eps power connector of the motherboard or, it can lead to the wires of the power block getting very hot to the point of melting.

If you intend to overclock the 750ti card as you say, and it does not have a six pin 12v Pci-e power connector block to the card.

Keep a close eye on the eight pin power block connected to the motherboard for 12v E-atx, 12v Eps power to the board.

Other than saying Yes it will work, I have seen it happen where when too much power by a graphics card is demanded
Due to the power draw cables start to heat up.

If smell any sort of plastic burning smell while overclocking the 750 ti card. Turn your system off.
And inspect the 12v E-atx connector on the motherboard.
And stop any overclocking of the 750 Ti card.

It greatly depends on the motherboard you are using, if it was around the £50 price when you bought it or less.
Then keep a close eye on the E-atx.

If the motherboard is in the £100 range or more, then it may be completely alright.

Thank you for the detailed response. Definitely got a cheapy motherboard. Not the worst, but I didn't pay too much for it ($40.) I'm sure it supports VERY rudimentary overclocking at the very least. I'll have to monitor the ATX 12V plug because yes, it is only using 4/8 pins as it only needs 4.

Temps are good. I think i'll keep it at a +170 CC and +200 MC for now. Will definitely need to watch though. Don't want my system to go bad.

Gilbertify · Aug 7, 2016

Dunlop0078 :

Okay, great. I won't go overboard on the OC'ing anyway. I don't mean overboard as in maxing it out, but not overclocking it to average memory and core clock boosts for this specific GPU.

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