Hi there...i am giving answer for both ECE and CSE so that you could understand the difference (this is completely my opinion)

My post is basically focusing on the EC people who has Gate rank in  between AIR 500 to AIR 2000.... which is really very confusing... I went  through the same experience in GATE 2013 (got AIR 800,EC)...
Plzz See below statistics (STRICTLY FOR EC STUDENTS and CS students plz see few last lines) :

>>NIT Trichi: (VLSI)
No. of students- 18
No. of students Placed- 15
Highest package- 13.2 lpa
Lowest package- about 4 lpa

>> NIT Trichi: (Communication)
No. of students- 16
No. of students Placed- 12
Highest package- 11 lpa
Lowest package- about 4 lpa

>> NIT Warangal: (VLSI)
No. of students- 16
No. of students Placed- 10 (Approx)
Highest package- 12 lpa
Lowest package- 6.2 lpa

>>NIT Warangal: (Communication)
No. of students- 23
No. of students Placed- 17
Highest package- 12.7 lpa (in PGCIL, INTEL)
Lowest package- 3.6 lpa

>>NIT Surathkal:
I don't hav exact statistics.
Its placements are comparable to above NIT's in Communication but its VLSI has 100% placement
But you could get vlsi in nit surathkal only if your AIR is under 600 OR Try your luck in Spot Round !!!

>> DCE (VLSI):
No. of students- 20
No. of students Placed- 12 (Approx)
Highest package- 12.5 lpa (broadcom)
Lowest package- about 4 lpa
Many out of 12 placed students have got in Teaching jobs....in "Lovely university" , "Galgotia" etc..
If u want to prepare for IES.... then this is the college u should look  for...as here, u'll get enough time for self-preparation ..

>> IIIT Hyderabad (VLSI) :
Awsumm faculty. As far as this is concerned for EC students  ONLY.....(placement wise off-course) ......what i hav found out from  IIIT H's vlsi students that its placements are not as good as people  think it is...!!!

>> IIIT Bangalore:
Awsumm  faculty(just look at the faculty qualifications from website)...good  placements:
For 2015 batch. Min. Package is 6.5 lpa , Max Package: 23 lpa , avg. package: 11.5 lpa (specially in year 2014 the placements were not as good as last  year...may be because of bad market conditions but before that  placements has been excellent almost 100%. Still there are 100% placement in 2014 batch at last). The only problem with iiit b  is -- Fees is high..and EC students MUST KNOW CODING or u cannot  survive here (as u will get degree in Information Technology only ).
Plzz DON't come here for VLSI...its not that good here in terms of placement,..

>> IIT Kanpur: (IME Branch)
Good placements, almost everyone gets 6 lpa placements from there.

>> IIT Mumbai: (IEOR)
Better than IIT K IME in terms of placements....it is more or less the same branch as IME of IITK.

>> NIETE Mumbai -- it is best among all the colleges/branch above  in terms of placements....provided u r interested in Management..

I wud rank above colleges (FOR EC) as: (placement wise, in my opinion)
Old IIT's Core Branches are at the top (IITB, IITM,IIT Kragpur, IITK)
Other non-new IIT core branches (like IIT G, IIT R etc)
NITIE   ---- (rank below 1500 should apply)
IIT Mumbai(IEOR) = IIIT B = IIIT H
IIT K(IME) = NIT W = NIT T = NIT Surathkal
DCE
All above colleges are good... just don't compare it with IIT's core branches...
.............................................................................................................
Now.....CS STUDENTS....i suppose you have good placements in all of the  above mentioned colleges....FOR CS STUDENTS ONLY....i would suggest  rankings as:
1. IIIT H
2. IIIT B = NIT Trichi = NIT Warangal = NIT Surathkal
3. DCE = NSIT=BITS pilani
4. Lower NIT's