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PSU and RAM voltage match? PSU can deliver no lower than 3.3V but RAM takes 1.5. Potential problem?

Tags:
  • DDR3
  • RAM
  • Crucial
  • CPUs
  • DIMM
  • Components
Last response: in Components
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September 3, 2014 1:06:48 AM

RAM: Crucial DDR3 8 GB DIMM 240-pin 1600 MHz / PC3-12800 CL11 1.5 V

CPU:


Now my question is. Will the Mobo compensate, or will I run into issues using this manner of setup? I am not 100% certain I need the 1000W model, the 750W might be sufficient however I believe they are the same setup in the voltage they supply.

More about : psu ram voltage match psu deliver lower ram takes potential problem

a c 78 à CPUs
September 3, 2014 1:09:36 AM

the ram should be fine, I think 1.5 and 1.65 are the normal voltages for ddr 3 ram, but to answer you question, yes, the board will get the rest of the power supplied by the psu to power the cpu, any fans you might have connected to the board
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Best solution

September 3, 2014 1:10:14 AM

The voltage to the RAM is regulated by the Motherboard/CPU.
The voltage of the PSU matters only for the specific Connection Pins (eg if u put a 12 V pin into a 5 V pin - dont do it!)

The main things you have to worry when configuring a rig are the most power drawing components:
1) GPU
2) CPU
3) Number of fans connected & cooling.
4) Rest is easily negligible.

Tell us the rest of the setup so we can calculate the total Wattage.

EDIT:
To go a little further into the electronics:
The voltage to the pins is always the same to the appropriate connections/pins (the 4 pin and 8 pin have 12 V i think, the 3 pins or what ever has lower). All the PSU have the same Voltage on the same pins/number of pins.
The difference is given by the amount of current it can supply. So you can have 40 Amps, 60 Amps and so on. That`s when you get your wattage. Power (aka wattage) = V (aka Voltage) * Current (in Amps).
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September 3, 2014 1:47:03 AM

indy17 said:
The voltage to the RAM is regulated by the Motherboard/CPU.
The voltage of the PSU matters only for the specific Connection Pins (eg if u put a 12 V pin into a 5 V pin - dont do it!)

The main things you have to worry when configuring a rig are the most power drawing components:
1) GPU
2) CPU
3) Number of fans connected & cooling.
4) Rest is easily negligible.

Tell us the rest of the setup so we can calculate the total Wattage.

EDIT:
To go a little further into the electronics:
The voltage to the pins is always the same to the appropriate connections/pins (the 4 pin and 8 pin have 12 V i think, the 3 pins or what ever has lower). All the PSU have the same Voltage on the same pins/number of pins.
The difference is given by the amount of current it can supply. So you can have 40 Amps, 60 Amps and so on. That`s when you get your wattage. Power (aka wattage) = V (aka Voltage) * Current (in Amps).


CPU: i7 4790K.
The retailer I bought it from doesn't list any of the power specifications, though reviews I found seem to put it somewhere around 350W

GPU: AMD Radeon HD 7970 Double Dissipation Edition by XFX. The specifications are almost at the bottom.

The specifications say the following:
Minimum Power Supply Requirement : 500 watt
So I don't know if that holds up under full load

MOBO: MSI Z97 Gaming 7

I have yet to buy case and additional fans.
Note: For the i7, I bought the CoolerMaster evo 212 to replace the stock fan.

Buuut my naive understanding of PSU and builds was that I needed the 1000W one since I plan to slightly OC my i7.
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September 3, 2014 1:53:00 AM

legend001523 said:
http://www.anandtech.com/show/5314/xfxs-radeon-hd-7970-...
On this it says that the card needs 357 at load including the system, so if you got a good psu, then you will be fine


I assume the way you work it out is as follows:
- figure the wattage requirements of individual components.
- Total requirements is summative of this numbers.

So given my CPU and GPU my need lands at around 850W not including any fans / cooling for a case I may want to buy.
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a c 78 à CPUs
September 3, 2014 1:54:51 AM

NearlyDelicious said:
legend001523 said:
http://www.anandtech.com/show/5314/xfxs-radeon-hd-7970-...
On this it says that the card needs 357 at load including the system, so if you got a good psu, then you will be fine


I assume the way you work it out is as follows:
- figure the wattage requirements of individual components.
- Total requirements is summative of this numbers.

So given my CPU and GPU my need lands at around 850W not including any fans / cooling for a case I may want to buy.


^no, on the link,he tested the gpu with the entire system, and the entire wattage needed for everything was 374
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September 3, 2014 2:01:51 AM

CPU: i7 4790K.
The retailer I bought it from doesn't list any of the power specifications, though reviews I found seem to put it somewhere around 350W

GPU: AMD Radeon HD 7970 Double Dissipation Edition by XFX. The specifications are almost at the bottom.

The specifications say the following:
Minimum Power Supply Requirement : 500 watt
So I don't know if that holds up under full load

MOBO: MSI Z97 Gaming 7

I have yet to buy case and additional fans.
Note: For the i7, I bought the CoolerMaster evo 212 to replace the stock fan.

Buuut my naive understanding of PSU and builds was that I needed the 1000W one since I plan to slightly OC my i7.


I am confuuuuuuuuuused!
I7 4790k has a TDP of 88 W.
http://www.tomshardware.com/reviews/core-i7-4790k-devil...
Read here for review and power under full loads.

With that build you should be fine with ~650-700 W PSU. Though, as stated here http://www.pcworld.com/article/2025425/how-to-pick-the-...
you should make a lil bit more calculations. Perhaps a 750 would be the sweet spot.

indy
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September 3, 2014 2:03:02 AM

legend001523 said:
NearlyDelicious said:
legend001523 said:
http://www.anandtech.com/show/5314/xfxs-radeon-hd-7970-...
On this it says that the card needs 357 at load including the system, so if you got a good psu, then you will be fine


I assume the way you work it out is as follows:
- figure the wattage requirements of individual components.
- Total requirements is summative of this numbers.

So given my CPU and GPU my need lands at around 850W not including any fans / cooling for a case I may want to buy.


^no, on the link,he tested the gpu with the entire system, and the entire wattage needed for everything was 374


Taking that into account the 750W model should be adequate for my build then. Though there is barely any price difference between the two units, so I may well be tempted to get the larger one in case I, in future, want to add a second gpu.
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a c 78 à CPUs
September 3, 2014 2:05:03 AM

NearlyDelicious said:
legend001523 said:
NearlyDelicious said:
legend001523 said:
http://www.anandtech.com/show/5314/xfxs-radeon-hd-7970-...
On this it says that the card needs 357 at load including the system, so if you got a good psu, then you will be fine


I assume the way you work it out is as follows:
- figure the wattage requirements of individual components.
- Total requirements is summative of this numbers.

So given my CPU and GPU my need lands at around 850W not including any fans / cooling for a case I may want to buy.


^no, on the link,he tested the gpu with the entire system, and the entire wattage needed for everything was 374


Taking that into account the 750W model should be adequate for my build then. Though there is barely any price difference between the two units, so I may well be tempted to get the larger one in case I, in future, want to add a second gpu.


yeah i guess so, what model psu is it?
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September 3, 2014 2:13:51 AM

legend001523 said:
NearlyDelicious said:
legend001523 said:
NearlyDelicious said:
legend001523 said:
http://www.anandtech.com/show/5314/xfxs-radeon-hd-7970-...
On this it says that the card needs 357 at load including the system, so if you got a good psu, then you will be fine


I assume the way you work it out is as follows:
- figure the wattage requirements of individual components.
- Total requirements is summative of this numbers.

So given my CPU and GPU my need lands at around 850W not including any fans / cooling for a case I may want to buy.


^no, on the link,he tested the gpu with the entire system, and the entire wattage needed for everything was 374


Taking that into account the 750W model should be adequate for my build then. Though there is barely any price difference between the two units, so I may well be tempted to get the larger one in case I, in future, want to add a second gpu.


yeah i guess so, what model psu is it?


Corsair HXi 1000W or HXi 750W

Prices at my retailer of choice
The 750W: $ 200.
The 1000W: $ 250.

Since I may upgrade the system with an additional GPU in the future, or simply add more power consumption through cooling, my thinking is that 750W is perhaps cutting it too close, and for only 50 dollars extra I may as well get the larger unit.
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a c 78 à CPUs
September 3, 2014 2:14:21 AM

yeah, the hxi is a good psu, go for it :D  will last you a while
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September 3, 2014 2:16:02 AM

legend001523 said:
yeah, the hxi is a good psu, go for it :D  will last you a while


Now I just need a proper case to fit my build into!

Thanks for the replies.
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