Well lately I've been trying to figure out whether or not I could upgrade my Inspiron 620 with a Gtx 750ti and I've been having trouble determining whether or not it would be a safe bet. The Nvidia website says that it could be used with a 300w psu but all the actual distributors suggest a 400w psu. I've also read that the psu should have 20 amps on the 12v rail and I found that my computer has 17 amps on the 12Va rail and 9 amps on the 12Vb rail. Lately I've been using a Gt 640 with my computer but I feel like i should upgrade, but is that really a smart move with my psu? Also if there is a different graphics card someone could recommend that would be great.
Inspiron 620 and a 750ti?
- Thread starter Kilmah
- Start date
Solution
limtenggen
Reputable
- Mar 12, 2014
- 108
- 2
- 4,710
Below is my rig before upgrade
Intel Core i7 processor 3770
nVidia GeForce GT640 4GB OEM
1TB Hard Drive
8GB DDR3 memory
DVD-Super Multi drive
Card Reader
2 fans , one for the cpu and other one is for computer case
i have a Liteon PS-6301-08A 300watt PSu and on the sticker it write
DC OUTPUT :+5v --/20A MAX
:+5v(SB) --/2A MAX
:-12v--/0.5A MAX
:+3.3v--20A MAX
:+12V1--10A MAX
:+12v2--13A MAX
1)Combined Power on +3.3v and +5v rails Not exceed 130w.
2)Combined Power on +12v1 and +12v2 SHALL not exceed 20A
3)At Ambient 25 Celsius total output power shall not exceed 300w
4)At Ambient 50 Celsius total output power shall not exceed 270w
After upgrade
Intel Core i7 processor 3770
Zotac Nvidia GeForce GTX 750 ti
1TB Hard Drive
8GB DDR3 memory
DVD-Super Multi drive
Card Reader
1 fan for the case
i assume that my i7 3370 have a MAx of 90 Watt TDP and GTX 750 TI 70 watt TDP
(90+70)÷12=13A
i have 2 rail 10A +12V and 13A +12v
by the way 300Watt -(90+70+50)watt = 90 watt left
the 50 is the max voltage i think will draw from other components
*BUT THE ABOVE IS ONLY MY OPINION
i am not responsible on your action/decision !
PS* there are many model of GTX 750 ti , some of them need pcie power connector , some does not require , my zotac GTX 750 ti does not require a pcie power connector,if u buy a GTX 750 ti with a PCIE power connector and put in your rig it will surely fail to start. Your cpu TDP is the key for the upgrade without changing your psu.
Intel Core i7 processor 3770
nVidia GeForce GT640 4GB OEM
1TB Hard Drive
8GB DDR3 memory
DVD-Super Multi drive
Card Reader
2 fans , one for the cpu and other one is for computer case
i have a Liteon PS-6301-08A 300watt PSu and on the sticker it write
DC OUTPUT :+5v --/20A MAX
:+5v(SB) --/2A MAX
:-12v--/0.5A MAX
:+3.3v--20A MAX
:+12V1--10A MAX
:+12v2--13A MAX
1)Combined Power on +3.3v and +5v rails Not exceed 130w.
2)Combined Power on +12v1 and +12v2 SHALL not exceed 20A
3)At Ambient 25 Celsius total output power shall not exceed 300w
4)At Ambient 50 Celsius total output power shall not exceed 270w
After upgrade
Intel Core i7 processor 3770
Zotac Nvidia GeForce GTX 750 ti
1TB Hard Drive
8GB DDR3 memory
DVD-Super Multi drive
Card Reader
1 fan for the case
i assume that my i7 3370 have a MAx of 90 Watt TDP and GTX 750 TI 70 watt TDP
(90+70)÷12=13A
i have 2 rail 10A +12V and 13A +12v
by the way 300Watt -(90+70+50)watt = 90 watt left
the 50 is the max voltage i think will draw from other components
*BUT THE ABOVE IS ONLY MY OPINION
i am not responsible on your action/decision !
PS* there are many model of GTX 750 ti , some of them need pcie power connector , some does not require , my zotac GTX 750 ti does not require a pcie power connector,if u buy a GTX 750 ti with a PCIE power connector and put in your rig it will surely fail to start. Your cpu TDP is the key for the upgrade without changing your psu.
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