Sli and power supply

  noobtype 10:41 16 Oct 2008


I'm starting out with Sli (2x 8800GT Nvidia 512mb cards) but i'm worried about power and the PSU. How can you tell how much power is needed, how much I have at the moment, the PC temp, and the distribution along the rails?

Thanks in advance

  Rahere 11:14 16 Oct 2008

Here goes assuming that you have a motherboard that supports SLi (!)

First check the spec of your current power supply - there's a sticker on it and assume that it's optimistic!

Expect to draw 40-140 amps power just for the cards so you will need a powerful high efficiency PSU which will cost you over £100+ but get advice from a specialist gaming site

A standard PC can consume 400w depending on your cpu/ram spec plus other hardware and accessories.

Plus if you work on video/audio or want to play high resolution games you might add the same power requirement again as a safety margin for the so it's going to be an investment on top of the cards and a compatible motherboard.

Some advice on power for each card here:
click here

Read the spec/requirements for all the items you mention - if you are building your own make sure you have more than the recommended minimum, plenty of cooling apparatus and that the two cards will fit in the case!!

8800 gt spec from Nvidia site
Standard Graphics Card Dimensions:
Height Single Slot
Length 9 inches
Width 4.376 inches

Thermal and Power Specs:
Maximum GPU Tempurature (in C) 105C
Maximum Graphics Card Power (W) 105W
Minimum System Power Requirement (W) 400w
Supplementary Power Connectors One 6-pin

  retep888 13:18 16 Oct 2008

click here

Scroll down to the third from bottom,choose the one you can most afford,bear in mind that in the near future when the graphic cards drop,you'll be tempted to go higher.

  noobtype 14:03 16 Oct 2008

Thanks for the replies. Should have said my spec - it's quad core q6000, 4gb ram, and an asus P5N-E SLI motherboard. It's a Cube247 Jupitor, but I think the spec has changed since I bought it according to their webiste. The website is very sparse with detail however. Also hear that I need the exact same graphics card as my current one, but all I know is it's an Nvidia geforce 512mb 8800GT. Seems to be lots of variants. Will any Nvidia card with that spec be ok? And yes I do lots of video work and high spec gaming.


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