My post to the Maxwell now thread yesterday got lost in the plethora of posts about high-end Maxwell problems. Please forgive me for opening a new thread.

Time to replace my trusty GTX 460, which has been GPUGrid-ing for years! At ~£100 the GTX 750Ti fits my budget nicely but I need some guidance.

1. Is the power feed only from the mobo enough for 24/7 or should I go for one with a 6-pin connection?
2. One fan or two?
3. WHICH 750Ti do you recommend?
4. Having done some research today I'm leaning towards the Gigabyte Windforce, with its 6-pin connector and OC opportunity.

Thanks.

Some answers:

1. The motherboard power feed should be more than enough. That said, some cards require an additional PCIE power feed.
2. I guess two fans would be less noisy
3. I back your preference towards the Gigabyte card, it's the one I should have bought myself, but didn't! I can definitely recommend to not get the ASUS card though. It doesn't handle high temperatures well. It's more of a gaming card.

The 750Ti is definitely a worthy cruncher: sips power, produces low levels of noise and its work / cost ratio is high. Get one! :)
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My post to the Maxwell now thread yesterday got lost in the plethora of posts about high-end Maxwell problems. Please forgive me for opening a new thread.

Time to replace my trusty GTX 460, which has been GPUGrid-ing for years! At ~£100 the GTX 750Ti fits my budget nicely but I need some guidance.

1. Is the power feed only from the mobo enough for 24/7 or should I go for one with a 6-pin connection?
2. One fan or two?
3. WHICH 750Ti do you recommend?
4. Having done some research today I'm leaning towards the Gigabyte Windforce, with its 6-pin connector and OC opportunity.

Thanks.

Thank you Vagelis and eXaPower for your responses.

The ASUS was my second choice but that's now crossed off, to be replaced by an EVGA. Need to check out prices...

FWIW, here's my GPUGrid crunching trio:

1. Upstairs is my four-year-old i7 Dell, busy only with the 460.
2. 800 miles away my daughter has my old ASUS 660, busy crunching for GPUGrid.
3. My prime rig is an ASUS Sabertooth 990FX R2.0, with a 770 in PCIE-2, and a 660 in PCIE-1 which is attached to video. All of this summer I have had to watch the the temperature of PCIE-1, which has often gone over the 60C limit, according to ASUS's Thermal Radar. When it goes over I stop crunching on the 660. Frustrating!

The plan is to install the 660 in the upstairs i7 and the to-be-acquired 750Ti in place of the 660. I hope that will cure the PCIE-1 temperature problem.

Thank you Vagelis and eXaPower for your responses.

The ASUS was my second choice but that's now crossed off, to be replaced by an EVGA. Need to check out prices...

FWIW, here's my GPUGrid crunching trio:

1. Upstairs is my four-year-old i7 Dell, busy only with the 460.
2. 800 miles away my daughter has my old ASUS 660, busy crunching for GPUGrid.
3. My prime rig is an ASUS Sabertooth 990FX R2.0, with a 770 in PCIE-2, and a 660 in PCIE-1 which is attached to video. All of this summer I have had to watch the the temperature of PCIE-1, which has often gone over the 60C limit, according to ASUS's Thermal Radar. When it goes over I stop crunching on the 660. Frustrating!

The plan is to install the 660 in the upstairs i7 and the to-be-acquired 750Ti in place of the 660. I hope that will cure the PCIE-1 temperature problem.

I'm using one ASUS GTX 750Ti OC (after Skgiven's advice).

For crunching I recommend to use such card which have its own PCIe power connector - the manufacturer and the boost clock doesn't matter that much.
If there's more than one GPU in the computer's case, the GPUs equipped with radial fan are better choice than the ones with axial fan (pictured above), as the latter emits the hot air into the PC's case, making the other GPU and the CPU hotter.

I'm using one ASUS GTX 750Ti OC (after Skgiven's advice).

Thank you Vagelis and eXaPower for your responses.

The ASUS was my second choice but that's now crossed off, to be replaced by an EVGA. Need to check out prices...

FWIW, here's my GPUGrid crunching trio:

1. Upstairs is my four-year-old i7 Dell, busy only with the 460.
2. 800 miles away my daughter has my old ASUS 660, busy crunching for GPUGrid.
3. My prime rig is an ASUS Sabertooth 990FX R2.0, with a 770 in PCIE-2, and a 660 in PCIE-1 which is attached to video. All of this summer I have had to watch the the temperature of PCIE-1, which has often gone over the 60C limit, according to ASUS's Thermal Radar. When it goes over I stop crunching on the 660. Frustrating!

The plan is to install the 660 in the upstairs i7 and the to-be-acquired 750Ti in place of the 660. I hope that will cure the PCIE-1 temperature problem.

MOBO is okay I have the same and has a GTX770 and a GTX780Ti FOC running 24/7. CPU and PCIe temps mostly around 60°C, sometimes over and then it turns red in Thermal Radar but that is no problem. The temps read by Thermal Radar are a bit to high, can be seen easily with other programs. Secondly the values are set in the BIOS, you can change that to 62 or 65 and then you don't see it being in red to often and your MOBO is still safe.

Secondly I, but this is personal, will only buy EVGA cards and only with one radial fan that troughs hot air out of the box.

Hello Tom,

Indeed I have also trouble with updating the BIOS, I use the AI Suite for that (where you find Thermal Radar too), but the first time it always get stuck after a few minutes. The I wait a bit longer and boot the system and then do it again and then it works. Is a bit weird. But I only update the BIOS when really needed have don it only twice yet. So when it works then it works.

Secondly, I don't know about the Japanese market, if you can get it. I also have never heart of that brand. Seems nice though and small as it is single slot. More will fit in one rig. Could be interesting. Perhaps someone else knows about this brand.

If you look here http://eu.evga.com/products/prodlist.asp, and you have to scroll down a bit, you find several 750Ti's with one radial fan. They ship with UPS and you pay 8.50 euri for shipment. And afterwards you register your card for warranty.
This is where I buy my EVGA stuff, but I am huge EVGA fan, my next MOBO and PSU will also from them. You have to decide yourself. Please see my recommendations only as advice/help.
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Greetings from TJ

I've been running 8 750TI cards for quite a while. Only 1 has a PCIe power connector (an EVGA ACX superclocked) That one has 2 fans and runs at 50-53C. The other cards are 3 EVGA superclocked and 4 PNY OC. The single fan cards run at 55-62C with very moderate fan speeds. A nice thing about the PNY cards is that the speed is factory set to 1202MHz before boost and 6008MHZ memory. They also have the smallest fans but cooling is fine, also quiet. I boost the memory speed of the EVGA cards to 6000MHz via Afterburner. The 750Tis draw about the same power as my 650Tis but are 45-50% faster. Pretty much happy with all of them and see no real advantage to either the 2 fan models or the PCIe power connector. All my boxes use modest Antec 300 cases and have 2 GPUs (mostly 1 NV and 1 AMD). Heat isn't a problem with any of them. By far the warmest running is the 1 EVGA card (a 670) that vents heat out the back. BTW FWIW while I use a few ASUS MBs I stay away from their GPUs because of some bad experiences with them in the past.

I've been running 8 750TI cards for quite a while. Only 1 has a PCIe power connector (an EVGA ACX superclocked) That one has 2 fans and runs at 50-53C. The other cards are 3 EVGA superclocked and 4 PNY OC. The single fan cards run at 55-62C with very moderate fan speeds. A nice thing about the PNY cards is that the speed is factory set to 1202MHz before boost and 6008MHZ memory. They also have the smallest fans but cooling is fine, also quiet. I boost the memory speed of the EVGA cards to 6000MHz via Afterburner. The 750Tis draw about the same power as my 650Tis but are 45-50% faster. Pretty much happy with all of them and see no real advantage to either the 2 fan models or the PCIe power connector. All my boxes use modest Antec 300 cases and have 2 GPUs (mostly 1 NV and 1 AMD). Heat isn't a problem with any of them. By far the warmest running is the 1 EVGA card (a 670) that vents heat out the back. BTW FWIW while I use a few ASUS MBs I stay away from their GPUs because of some bad experiences with them in the past.

The plan is to install the 660 in the upstairs i7 and the to-be-acquired 750Ti in place of the 660. I hope that will cure the PCIE-1 temperature problem.

Initial impression is that the 750Ti is crunching at about 80% of a 660. That's pretty good price-performance.

Initial impression is that the 750Ti is crunching at about 80% of a 660. That's pretty good price-performance.

For some reason my 750Ti cards are running as fast to perhaps a bit faster than your 660s. Also in Win7-64, these are all factory OCed models, maybe that's the difference.

For some reason my 750Ti cards are running as fast to perhaps a bit faster than your 660s. Also in Win7-64, these are all factory OCed models, maybe that's the difference.

I read somewhere that these cards can take serious overclocking so I thought I'd have a go (never done that before...). The pic below is my current status. Any thoughts about what my target OC numbers should be?

Suprisingly I have found mem OC on the 750ti to have negligable impact (due to the large 2MB cache) - was only something in the order of 120sec per 100Mhz increase for long runs of 45k secs.

Understand as mem does not 'idle' - OC cuts into the limited power budget available - hence suggest the core is mildly OCed instead.

Able to run the Gigabyte OC card completely passively with factory OC due to large heat sink

My factory OCed models (PNY & EVGA) are mostly running at 1307 - 1320 MHz core

I do bump the memory speed to 6000 MHz on the EVGAs

And I just discovered a major problem with Precision X 16: it does not remember settings across boots!!

For 3+ hours it ran and looked like it would complete in about 10 hours but it errored.

Now I need some help please. Precision X 16 does have a mem clock offset slider but it does not display a value. What can I use to see this value while adjusting?

Now I need some help please. Precision X 16 does have a mem clock offset slider but it does not display a value. What can I use to see this value while adjusting?

Ah! Now I see it: But the slider goes nowhere near your 6000 MHz. The max is 4752 MHz...

Now I need some help please. Precision X 16 does have a mem clock offset slider but it does not display a value. What can I use to see this value while adjusting?

Ah! Now I see it: But the slider goes nowhere near your 6000 MHz. The max is 4752 MHz...

In Precision it reports the memory speed as 3000 instead of 6000, just a different way of looking at it. DDR: double data rate:

I suppose 1305 MHz core clock is the highest you can set?

Regarding the memory: 3000 / 6000 MHz should still be reasonable

Suprisingly I have found mem OC on the 750ti to have negligable impact (due to the large 2MB cache) - was only something in the order of 120sec per 100Mhz increase for long runs of 45k secs.

A truly 750Ti lover :)

http://www.gpugrid.net/show_user.php?userid=101769

A truly 750Ti lover :)

http://www.gpugrid.net/show_user.php?userid=101769

A truly 750Ti lover :)

http://www.gpugrid.net/show_user.php?userid=101769

Blimey - 25!!

What mobo lets you run seven double-wide GPUs??