Pls design me a gaming pc

Solution
You have not mentioned cost limit. So I have designed a PC keeping the Highest settings for Dota 2 in mind, excluding costs barriers.

Case
COOLERMASTER ELITE 311 BLUE CASE

Processor (CPU)
Intel® Core™i5 Quad Core Processor i5-4460 (3.2GHz) 6MB Cache

Motherboard
ASUS® H97M-E: Micro-ATX, LG1150, USB 3.0, SATA 6GBs

Memory (RAM)
8GB KINGSTON DUAL-DDR3 1600MHz (1 x 8GB)

Graphics Card
2GB AMD RADEON™ R7 250 - DVI,HDMI,VGA - DX® 11

1st Hard Disk
120GB Samsung 840 EVO SSD, SATA 6Gb/s (upto 540MB/sR | 410MB/sW)

2nd Hard Disk
2TB WD CAVIAR BLACK WD2003FZEX, SATA 6 Gb/s, 64MB CACHE (7200rpm)

1st DVD/BLU-RAY Drive
24x DUAL LAYER DVD WRITER ±R/±RW/RAM

Power Supply
CORSAIR 450W VS SERIES™ VS-450 POWER SUPPLY

Processor Cooling...
You have not mentioned cost limit. So I have designed a PC keeping the Highest settings for Dota 2 in mind, excluding costs barriers.

Case
COOLERMASTER ELITE 311 BLUE CASE

Processor (CPU)
Intel® Core™i5 Quad Core Processor i5-4460 (3.2GHz) 6MB Cache

Motherboard
ASUS® H97M-E: Micro-ATX, LG1150, USB 3.0, SATA 6GBs

Memory (RAM)
8GB KINGSTON DUAL-DDR3 1600MHz (1 x 8GB)

Graphics Card
2GB AMD RADEON™ R7 250 - DVI,HDMI,VGA - DX® 11

1st Hard Disk
120GB Samsung 840 EVO SSD, SATA 6Gb/s (upto 540MB/sR | 410MB/sW)

2nd Hard Disk
2TB WD CAVIAR BLACK WD2003FZEX, SATA 6 Gb/s, 64MB CACHE (7200rpm)

1st DVD/BLU-RAY Drive
24x DUAL LAYER DVD WRITER ±R/±RW/RAM

Power Supply
CORSAIR 450W VS SERIES™ VS-450 POWER SUPPLY

Processor Cooling
CoolerMaster Hyper 212 EVO (120mm) Fan CPU Cooler (£29)

Sound Card
ONBOARD 6 CHANNEL (5.1) HIGH DEF AUDIO (AS STANDARD)

Wireless/Wired Networking
10/100/1000 GIGABIT LAN PORT (Wi-Fi NOT INCLUDED)

USB Options
MIN. 2 x USB 3.0 & 4 x USB 2.0 PORTS @ BACK PANEL + MIN. 2 FRONT PORTS

Power Cable
1 x 1 Metre UK Power Cable (Kettle Lead)

Operating System
Genuine Windows 8.1 64 Bit - inc DVD & Licence (£79)

Monitor
ASUS VN247H 23" ULTRA FAST FULL HD LED DISPLAY (£179)

Keyboard & Mouse
Razer® Deathstalker Expert Gaming Keyboard (£69)

Mouse
Razer® Taipan Expert Ambidextrous Gaming Mouse (£68)

Speakers
LOGITECH Z523 2.1 SPEAKERS - 40W RMS with 360 Degree Sound (£79)

Webcam
Logitech® HD Webcam C920 - 1080p recording & 720p video calling (£88)

Headsets
Razer Tiamat 2.2 Gaming Headset (£92)

This would cost about 1280 Euros. This setup can be made more cost effective by eliminating webcam and speakers. Deduct 120-150 Euros by eliminating these 2.

This setup can run Dota 2 with ease, it is capable of running many high end games. BF4 can run on it with ease. You can compare accordingly.
 
Solution
Ok I see, I mistook that one for R9 270, clicked the wrong link sorry.

There you go:

Case
COOLERMASTER ELITE 311 BLUE CASE


Processor (CPU)
Intel® Core™i5 Quad Core Processor i5-4460 (3.2GHz) 6MB Cache


Motherboard
Gigabyte Z97X Gaming 3: ATX, LG1150, USB 3.0, SATA 6GBs, XFIRE/SLI
Free Item


Memory (RAM)
8GB KINGSTON HYPER-X FURY DUAL-DDR3 1600MHz (1 x 8GB)


Graphics Card
3GB AMD RADEON™ R9 280 - DVI, HDMI, mDP - DX® 11.2, Eyefinity
Free Item


1st Hard Disk
120GB KINGSTON V300 SSD, SATA 6 Gb (450MB/R, 450MB/W)


2nd Hard Disk
1TB 3.5" SEAGATE SSHD, SATA 6Gb/s 7200 RPM (64MB + 8GB SSD CACHE)


1st DVD/BLU-RAY Drive
24x DUAL LAYER DVD WRITER ±R/±RW/RAM


Power Supply
CORSAIR 650W RM SERIES™ MODULAR 80 PLUS® GOLD, ULTRA QUIET (£79)


Processor Cooling
CoolerMaster Hyper 212 EVO (120mm) Fan CPU Cooler (£29)


Power Cable
1 x 1 Metre UK Power Cable (Kettle Lead)


Operating System
Genuine Windows 8.1 64 Bit - inc DVD & Licence (£79)


Monitor
ASUS VN247H 23" ULTRA FAST FULL HD LED DISPLAY (£179)


Keyboard & Mouse
Razer® Deathstalker Expert Gaming Keyboard (£69)


Mouse
Razer® Taipan Expert Ambidextrous Gaming Mouse (£68)


Speakers
Creative Inspire A550 5.1 Surround Sound Speaker System (£55)


Webcam
Logitech® HD Webcam C920 - 1080p recording & 720p video calling (£88)


Headsets
Razer Tiamat 2.2 Gaming Headset (£92)

Made some changes. This one costs about 1400 Euros.