Need low profile low power gpu

[silentbogo]

Port is not crippled and not a single sane manufacturer will intentionally limit the current in complete disregard to specification

240W-84W=156 watts Do you really think that 156 watts isn't enough to run a 75 watt (MAX) GPU and all of the rest of the computer? And that's assuming a 100% load on the CPU and GPU at the same time. Now the OP should stay away from running MAX CPU benchmark AND MAX GPU benchmark - at the same time.

Don't forget that it is a pre-made aftermarket low-budget PC.
PSU is definitely not 80+ certified, so even if we give it an optimistic 75% efficiency before it starts losing its mind, we will get a safe margin of 180W.

85W is used by CPU at 100% load assuming that it is not overclocked. Then you have devices like motherboard, RAM, HDD, ODD etc, which use not so much individually, but add up to a significant number.
His entire system without CPU uses approximately 130W at full load, so with GTX750Ti this number jumps a bit over the safe limit. He might experience occasional voltage fluctuations, maybe some random shutdowns, but nothing serious.

If @JunkBear at some point decides to add an SSD and another stick of RAM - that's another 5W. Even an 80+ certified PSU starts to wobble at that point.

So there are a few ways to fix this:
1) Downgrade the CPU to something 65W or lower (e.g. Pentium G3258 )
2) Downclock the existing CPU to the point where it acts like Pentium G3258
3) Tear out the ODD and do not use any USB devices. Forget about overclocking and if you are still desperate for power - take out all fans and just blow really hard to cool off the CPU.
4) Just buy a 25W GT730, or wait for low-budget variations of R5/7 3xx or GT9xx if there will be any.

 

[thebluebumblebee]

Those are custom-made motherboards, it wouldn't be strange to have a crippled port.

Am I wrong to think that if that's the case, then they'd better put a label on there warning me of that?!

PSU is definitely not 80+ certified, so even if we give it an optimistic 75% efficiency before it starts losing its mind, we will get a safe margin of 180W.

You have efficiency all wrong. A 75% efficient 500 watt PSU supplies the same amount of watts to a PC as does a 90% efficient 500 watt PSU. The 500 watts is what the PSU is rated at supplying to the PC, not what it pulls from the wall. That 75% efficient 500 watt PSU at 100% load will pull (x-.25x=500) ~667 watts from the wall. The 90% unit (x-.1x=500), ~556 watts. Unfortunately, this invalidates the rest of your argument.

 

[JunkBear]

Low budget computer? Its a 749$ Business desktop. So I guess the psu got higher quality standards.

 

[Mussels]

Am I wrong to think that if that's the case, then they'd better put a label on there warning me of that?!

You have efficiency all wrong. A 75% efficient 500 watt PSU supplies the same amount of watts to a PC as does a 90% efficient 500 watt PSU. The 500 watts is what the PSU is rated at supplying to the PC, not what it pulls from the wall. That 75% efficient 500 watt PSU at 100% load will pull (x-.25x=500) ~667 watts from the wall. The 90% unit (x-.1x=500), ~556 watts. Unfortunately, this invalidates the rest of your argument.

a lot of people get that wrong, it seems.

If you had a 100W PSU and 80% efficiency, it could supply 100W (if the manuf was honest) but would draw 125W* at the wall to do so. scale it up for bigger PSU's, see the idea. I've shaved 50-100W off systems going from generic shit to 80+ units.

 

[xela333]

Its a LED tv.

It's still an LCD tv, just with an led backlight. Plus that doesn't mean it's 1080p. If that's the resolution best fitting, it's only a HD ready, 720p tv, not 1080p. Hope you didn't buy that recently.

 

[xela333]

Low budget computer? Its a 749$ Business desktop. So I guess the psu got higher quality standards.

That seems a little pricey for the spec you got. But it's still going to be using a fairly low budget psu as the parts Lenovo have used do not require anything particularly powerful. As everyone has said, a low profile 750ti is going to be your best bet.

 

[silentbogo]

a lot of people get that wrong, it seems.

If you had a 100W PSU and 80% efficiency, it could supply 100W (if the manuf was honest) but would draw 120W at the wall to do so. scale it up for bigger PSU's, see the idea. I've shaved 50-100W off systems going from generic shit to 80+ units.

At least I've learned something new. Always thought it backwards until yesterday, when I read the article explaining the 80+ cert and PSU efficiency.

Which means that even GTX750 will be fine.

Low budget computer? Its a 749$ Business desktop. So I guess the psu got higher quality standards.

Don't let the prices fool you. You are basically paying for a fancy box with $400 worth of parts.

For $600 you can build a PC identical to their M73 flagman with Core i7-4770, 16GB of decent DDR3 (2x8GB), average mini-ITX motherboard with miniPCI-E WiFi adapter, and put it all into a spacious CM Elite 130 with a full-sized 80+ Bronze certified 300W ATX power supply. The difference of $149 can be spent on OS of your choice, that GTX 750 Ti or vodka and hookers!

 

[thebluebumblebee]

If you had a 100W PSU and 80% efficiency, it could supply 100W (if the manuf was honest) but would draw 120W at the wall to do so.

You're making the same math mistake that I used to make. (the answer is 125W, not 120W)

@JunkBear is in Canada so his prices are higher.

@silentbogo , (concerning this computer) you need to look at a computer the way a business does. In your example given above, you forgot the costs of the IT person to build the computer and to supply future warranty support. After you take the cost of the OS out of that $149, you'll find that building it yourself costs more than buying it pre-made, assembled, and tested. Computers are appliances to businesses

 

[Mussels]

You're making the same math mistake that I used to make. (the answer is 125W, not 120W)

@JunkBear is in Canada so his prices are higher.

@silentbogo , (concerning this computer) you need to look at a computer the way a business does. In your example given above, you forgot the costs of the IT person to build the computer and to supply future warranty support. After you take the cost of the OS out of that $149, you'll find that building it yourself costs more than buying it pre-made, assembled, and tested. Computers are appliances to businesses

lol yes, i did make that math mistake. good catch.

 

[JunkBear]

Ok thank you all for advices. So ill upgrade and play some newer games.

 

[Atomic77]

Power supply is very important most people will have to upgrade in order to have a better video card. I had a computer die once do to a video card upgrade with out changing the default PSU.