can i install this card hd 7750 on my pc: dell gx 755 mt ???

This one should fit: www.newegg.com/.../Product.aspx

Yes should fit fine.

SAPPHIRE 100357LP Radeon HD 7750 1GB 128-bit GDDR5 PCI  x16

   Chipset Manufacturer: AMD

   Core Clock: 800MHz

   Stream Processors: 512 Stream Processors

   Effective Memory Clock: 1125MHz (4.5Gbps)

   Model #: 100357LP

   Item #: N82E16814202002

this will be perfect too    http://images17.newegg.com/is/image/newegg/14-150-612-Z01?$S300$

http://www.newegg.com/Product/Product.aspx?Item=N82E16814150612&Tpk=xfx%207750

what you think  ???

OK. what is the effect of being 1 inch under heat-sink area ?

this will be perfect too    http://images17.newegg.com/is/image/newegg/14-150-612-Z01?$S300$ http://www.newegg.com/Product/Product.aspx?Item=N82E16814150612&Tpk=xfx%207750 what you think  ???

Card Dimensions     8.3" x 4.4" x 0.74"   It will likely fit but it will be snug against the heatsink shroud.

I measured it. there are 7 inches before you hit the black shroud.  The 8 inch card will ONLY FIT in a 755 MT (Mini Tower).

The one we recommend is 6.69" x 2.64" x 0.71"

Its over 8 inches long.  That means 1 inch will be in the heatsink area just as the 8800GT card in my picture is in the above post.

i know .

the problem not in long . the problem in card height

this card less than 2 cm height

it will fit  without being snug against the heat sink shroud.

No effect whatsoever IF the fan is not in that area.  Otherwise if it is it could make a motor boat sound as the blades frap frap frap against the heatsink shroud.

as i can see it is not in that area .

another question please

this card is pci-e v.3 what is the version of pci-e in dell gx755?

and i wonder  .is this card will work good in my pc?

the least i can say

you are very very good

I appreciate that

thanks for your help

The questions have been answered and recommendations made.  Your questions involve non dell products.

I am not XFX support nor do I work for dell.  PCI-E V3 is not on the 755.