Computer help.? Need a graphics card upgrade?

ok here's deal... upgrading graphics card isn't worth unless you're moving least 2 models. gt 610 gt 620 - no, gt 610 gt 630 or above, yes.

record, geforce gt 610 renamed gt 520, while gt 620 renamed gt 530 (exactly same gt 430) , gt 630 renamed gt 440:

http://www.engadget.com/2012/05/20/nvidi...

going gt 610 gt 620 (in other words, gt 520 gt 430) small upgrade:
http://www.techpowerup.com/reviews/zotac...

going gt 630 (i.e. gt 440) bigger jump:
http://www.techpowerup.com/reviews/asus/...

in under-$100 category amd cards offer better bang/buck. nvidia cards aren't priced competitively hit gtx 650 , higher level. example radeon hd 6570 has same performance geforce gt 630 costs $15 less. , radeon hd 7750 best card can $90.

http://www.newegg.com/product/product.aspx?item=n82e16814131441
http://www.newegg.com/product/product.aspx?item=n82e16814161403

performance:
http://www.tomshardware.com/reviews/geforce-gt-640-review,3214-7.html

before can suggest specific upgrades need more information computer. in particular, form factor (is regular tower or smaller slimline model?) , power supply rating. better graphics cards draw more power low-end models, psu restricts upgrade options. , of course slimline computers can accept low-profile cards.

graphics cards around $100 require @ least 300w power supply. radeon hd 6670 amd 7750 both run fine on 300w power supplies, manufacturer's official recommendation of 400w unti overinflated. slimline computers have 220-250 watt power supplies... slimline computers typically can't handle better geforce gt 610 or radeon hd 6450 unless upgrade power supply, too.

i have nvidia geforce gt 610 1gb in desktop. upgrading msi nvidia geforce gt 620 2gb low profile gddr3 pci-express video card upgrade price if not better around 100$ that's

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