Optiplex 745 Small Form Factor Power Supply

[polis_putrus]

Hello guys, I was wondering, is 275 watts enough for a Core 2 Quad Q6700, R7 240 2GB low profile, 1TB harddrive, 3X2GB 1X1GB ram, 2 small fans, and a pci wifi card + I removed the CD drive to save more watts, as I do not use it, I went to http://www.coolermaster.com/power-supply-calculator/ put in all my specs and it says Load Wattage: 275 watts, Recommended PSU wattage: 325 watts, Im worried because Im not sure if coolermaster is accurate. Thank You

 

[hang-the-9]

Yes will be fine, CPU is about 100W, video card is 40, rest of system won't use too much.

 

[ko888]

If you were to run both Prime95 and Furmark concurrently on that system the total power draw should be around 210 Watts.

 

[polis_putrus]

Yes will be fine, CPU is about 100W, video card is 40, rest of system won't use too much.

Yes, but please go to http://www.coolermaster.com/power-supply-calculator/ and INSERT NOTHING and press calculate, then it says load wattage 113, does that mean that the motherboard uses 113 watts? this is the main thing im worried about if it didnt say this I would have upgraded my computer by now.

 

[polis_putrus]

The Core 2 Quad Q6700 is 105 watts and the Radeon R7 240 is 30 watts together they are 135 watts, the computer has 275 watts, so that means I need 140 watts free for the upgrade, are you guys sure, because the comuter came with orignally with a Core 2 Duo E6400, which is 65 watts, THAT MEANS they put a power supply nearly 210 watts more than they needed that does not sound right, but if it is correct that they put 210 watts more than needed please tell me, also please look at this https://drive.google.com/file/d/1yiKxH8Ip941jWFeXninGqx58M1k2AEdi/view it shows all my computer specs after ive upgraded the cpu and gpu (I upgraded the ram 3 months ago) in the psu calculator. Thank You for quick replies.

 

[hang-the-9]

The Core 2 Quad Q6700 is 105 watts and the Radeon R7 240 is 30 watts together they are 135 watts, the computer has 275 watts, so that means I need 140 watts free for the upgrade, are you guys sure, because the comuter came with orignally with a Core 2 Duo E6400, which is 65 watts, THAT MEANS they put a power supply nearly 210 watts more than they needed that does not sound right, but if it is correct that they put 210 watts more than needed please tell me, also please look at this https://drive.google.com/file/d/1yiKxH8Ip941jWFeXninGqx58M1k2AEdi/view it shows all my computer specs after ive upgraded the cpu and gpu (I upgraded the ram 3 months ago) in the psu calculator. Thank You for quick replies.

Asking the same thing and expecting a different answer won't get you anywhere except people repeating themselves. The quad core CPU is about 100 watts, the 240 card is 40 watts, max. Math is pretty simple from that.

Having a 245 watt power supply is normal for a small form business system.

 

[polis_putrus]

THANK YOU I will be upgrading soon might take 2 months or more
:/
Final upgrade will be
Core 2 Duo E6400 (65w) --> Core 2 Quad Q6700 (105w) - Ebay $20
AMD Radeon R5 240 1GB (50w) --> AMD Radeon R7 240 2GB (30w) - Ebay $50-$60
80GB WD Hard Drive --> 1TB WD Hard Drive - Ebay $50
if I come across any problems I will let you know
THANKS AGAIN

 

[william p]

The Opti 745 can run the QX6800 2.93GHz also. SLACP is the better version. That thing was designed to run power hungry Pentium4 and PentiumD CPUs.
JP911 is the SFF heatpipe cooler for high powered CPUs.

 

[polis_putrus]

The Opti 745 can run the QX6800 2.93GHz also. SLACP is the better version. That thing was designed to run power hungry Pentium4 and PentiumD CPUs.
JP911 is the SFF heatpipe cooler for high powered CPUs.

Wouldnt it be too risky because it uses 130 watts that is almost half the max watts the power supply can handle?

 

[william p]

The Opti 745 came with PentiumD CPUs so the Optiplex 95W limit doesn't apply. They added support for Core 2 quads later. Being an SFF means there won't be much more than a CPU,GPU and a couple drives anyway. Later SFF came with 240W PSUs and 95W CPUs.

 

[polis_putrus]

Guys I will continue with the upgrade but instead of the Radeon R7 240 2GB (30w) I will purchase a Radeon R7 250 2GB (65w), also I added up all my parts watts,
Core 2 Quad Q6700 - 95 watts
Radeon R7 250 - 65 watts
Ram 7GB - 33 wats
1TB Hard Drive - 11 watts
2 or 3 small fans - 4 watts
All added up to 208 watts, that means approximately 67 watts free out of 275 watts, if there is anything wrong here or if there is anything that is not accurate please let me know. Thank You

 

[william p]

Dell uses the 5V. rail more than newer systems. This leaves more 12V. power available for the good stuff. You should be OK.

 

[polis_putrus]

sorry william p I touched the bad vote, I'm sorry I didn't really know what it was + I'm using my phone right now, couldn't undo it, I'm new here, sorry and thank you for the explanation.

 

[william p]

That's OK, I don't know what that is either. I don't think I've ever seen it before.

 

[polis_putrus]

Guys would THIShttp:// be a good GPU choice and would THIS be a good CPU choice

 

[william p]

Those should work OK.

 

[polis_putrus]

Those should work OK.

Thank You