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Will HD 7750 run on 250W PS with C2D processor (Dell Inspiron 530S PC)

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  • Power Supplies
  • Desktops
  • Processors
  • Graphics
  • Dell Inspiron
  • HD
Last response: in Graphics & Displays
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July 10, 2014 11:08:06 AM

I am using a Dell Inspiron 530S desktop with 250W power supply, core 2 duo processor 2 GB DDR3 RAM, 320 GB Hard Disk. Will HD 7750 run with current specs?

More about : 7750 run 250w c2d processor dell inspiron 530s

a b ) Power supply
July 10, 2014 11:34:32 AM

no..upgrade your psu to 400 - 450 watt
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a b ) Power supply
July 10, 2014 12:46:07 PM

tarunbugs said:
I am using a Dell Inspiron 530S desktop with 250W power supply, core 2 duo processor 2 GB DDR3 RAM, 320 GB Hard Disk. Will HD 7750 run with current specs?


Yes it will run. I used to have a 530S with the same power supply and it ran fine. Upgrade your RAM though.

(Also, isn't it DDR2 RAM? I know mine was)
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a b ) Power supply
July 10, 2014 12:46:37 PM

prit87 said:
no..upgrade your psu to 400 - 450 watt


finding a good power supply for a slim low profile PC is a feat in itself. The standard power supply can run the 7750 fine.
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a b ) Power supply
July 10, 2014 12:52:31 PM

well it will run but there is a risk of damaging the card i have seen my friend damaging his card hd 6670 using a low end psu after 1 year...
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a b ) Power supply
July 10, 2014 12:56:21 PM

prit87 said:
well it will run but there is a risk of damaging the card i have seen my friend damaging his card hd 6670 using a low end psu after 1 year...


It ran in mine just fine m8.
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July 10, 2014 2:20:52 PM

Shadowblade2652 said:
tarunbugs said:
I am using a Dell Inspiron 530S desktop with 250W power supply, core 2 duo processor 2 GB DDR3 RAM, 320 GB Hard Disk. Will HD 7750 run with current specs?


Yes it will run. I used to have a 530S with the same power supply and it ran fine. Upgrade your RAM though.

(Also, isn't it DDR2 RAM? I know mine was)


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July 10, 2014 2:22:49 PM

Thanks shadowblade. U r right its DDR2 Ram. Will surely upgrade the ram but sadly the max on it is 4GB.
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a b ) Power supply
July 10, 2014 2:57:46 PM

The Dell 250w PSU can output at most 17a on the +12v rail. It is that rail the most of the components in a PC draws power from. That includes the CPU and the GPU.

17a means the PSU can deliver up to 204w power on the +12v rail. The Radeon HD 7750 consumes 41w on average and 43w peak. That is roughly 20% of the available power on the +12v rail. How much power the CPU draws depends on the actual model.

Assuming the CPU is the C2D E6600 that CPU should draw 55w with a 100% load (I have that CPU in a old HTPC). Combined with the Radeon HD 7750 that works out to peak power of 98w. Toss in another 50w for various other components like the motherboard itself, fans, 1 hard drive and 1 optical drive. Total power works out to an estimated 148w.

Since the estimated 148w peak power works out to 72.5% of the total capacity of the +12v rail I would say it should be within the safe limits of the PSU's +12v output.

But... There is always a but... The quality of the PSU is important. Around the time Dell was selling PCs using the Core 2 Duo and Core 2 Quad CPUs they were using PSU from Delta and FSP. Both are good brands and should be able to handle the load. However, I have read that some of the Dells were using PSUs from Bestec. Not sure if they were replacement PSUs or they were PSUs shipped with the Dell PC. I do not have much confidence in Bestec, in fact I recommend people to avoid that brand entirely.

If the power supply has a sticker on it that states Delta or FSP, I then I have no problems with installing the Radeon HD 7750. If the sticker states Bestec, then I would recommend you replace it with a FSP PSU that will fit. I don't think Delta sells a "replacement PSU" to consumers.
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a b ) Power supply
July 10, 2014 8:54:38 PM

jaguarskx said:
The Dell 250w PSU can output at most 17a on the +12v rail. It is that rail the most of the components in a PC draws power from. That includes the CPU and the GPU.

17a means the PSU can deliver up to 204w power on the +12v rail. The Radeon HD 7750 consumes 41w on average and 43w peak. That is roughly 20% of the available power on the +12v rail. How much power the CPU draws depends on the actual model.

Assuming the CPU is the C2D E6600 that CPU should draw 55w with a 100% load (I have that CPU in a old HTPC). Combined with the Radeon HD 7750 that works out to peak power of 98w. Toss in another 50w for various other components like the motherboard itself, fans, 1 hard drive and 1 optical drive. Total power works out to an estimated 148w.

Since the estimated 148w peak power works out to 72.5% of the total capacity of the +12v rail I would say it should be within the safe limits of the PSU's +12v output.

But... There is always a but... The quality of the PSU is important. Around the time Dell was selling PCs using the Core 2 Duo and Core 2 Quad CPUs they were using PSU from Delta and FSP. Both are good brands and should be able to handle the load. However, I have read that some of the Dells were using PSUs from Bestec. Not sure if they were replacement PSUs or they were PSUs shipped with the Dell PC. I do not have much confidence in Bestec, in fact I recommend people to avoid that brand entirely.

If the power supply has a sticker on it that states Delta or FSP, I then I have no problems with installing the Radeon HD 7750. If the sticker states Bestec, then I would recommend you replace it with a FSP PSU that will fit. I don't think Delta sells a "replacement PSU" to consumers.


A Dell Inspiron 530s will typically use a bestec 250w.
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