So, i came up with a low-end build, with Skylake CPU and DDR4 2133 Mhz RAM.
PCPartPicker part list /
Price breakdown by merchant
CPU: Intel Core i3-6100 6th Gen LGA 1151 Processor (₹9299.00)
MoBo: Gigabyte GA-H110M-S2 Socket LGA 1151 Motherboard (Black) (₹4638.00)
RAM: Hyperx Performance Gamming Black 4 GB DDR 4 -2133 CL14 288 -Pin UDIMM Desktop Ram (HX421C14FB-4) (₹1999.00)
RAM: Hyperx Performance Gamming Black 4 GB DDR 4 -2133 CL14 288 -Pin UDIMM Desktop Ram (HX421C14FB-4) (₹1999.00)
Total: ₹17935.00
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-10-11 02:29 IST+0530
(Click on the "PCPartPicker part list" link to be redirected to the pcpp site. From there, when you click on part names, you can see the amazon link to buy your parts.)
Since your budget is very limited, you have to reuse many of your old components to make the build work. That includes: computer case, PSU and storage device(s) (HDD). But not your GPU. See the note below.
With LGA1151 socket, your MoBo supports current Skylake and future Kaby Lake and Cannonlake CPUs from Intel.
H-series MoBo supports RAM speeds of 2133 Mhz. Put in 2x 4GB RAM in total of 8GB.
Note: i3-6100 has onboard graphics, Intel HD 530 and it is slightly better than your GT 730!
So, you can run the new system without using your GPU at all. MoBo also has a VGA connector to where you can connect your monitor.
Here's also a comparison between your current system (base) and the upgraded system (alternative).
Userbenchmark PC Build Comparison
Baseline Bench: Game 15%, Desk 39%, Work 22%
CPU:
Intel Core i3-2100
GPU:
Nvidia GeForce GT 730
HDD:
WD Blue 500GB (2010)
RAM:
Corsair Vengeance DDR3 1600 C9 2x4GB
MBD:
Intel DH61WW
Alternative Bench: Game 18%, Desk 52%, Work 28%
CPU:
Intel Core i3-6100
GPU:
Intel HD 530 (Desktop Skylake)
HDD:
WD Blue 500GB (2010)
RAM:
HyperX Fury DDR4 2133 C14 2x4GB
MBD:
Gigabyte GA-H110M-S2H
(Had to put in one common HDD to make the bench work.)