First computer building plan

[Not a Black]

Hello! I am thinking about making a computer. I am new to the "computer building" so be gentle and thank you for helping me out.

[specs]

GPU - Gtx 780 ti VS Gtx 880(up coming)

CPU - Intel Core i7-4790K 4.0GHz Quad-Core Processor

Power Supply - Corsair 750W 80+ Platinum Certified Fully-Modular ATX Power Supply

Motherboard - MSI Z97-GAMING 5 ATX LGA1150 Motherboard

Ram - Corsair Vengeance Pro 8GB (2 x 4GB) DDR3-2400 Memory x2

Fans - Corsair Air Series AF140 Quiet Edition 67.8 CFM 140mm Fan x2 + Corsair Air Series AF120 Quiet Edition (2-Pack) 39.9 CFM 120mm Fans x2

Case - Corsair 650D ATX Mid Tower Case

[Questions]

Any recomandation for the fan splitter that fits on my motherboard?

Better power supply than the current one?

Better motherboard than the current one?

Better RAM than the current one?

Better fan than the current one?

LIQUID COOL VS AIR COOL CPU COLLER

What Thermal Paste should I buy?

What exactly is a thermal paste and is it helpful?

How can i Use the thermal paste?

I want to make my computer look good inside. I am trying to go for Red/Black theme. I want to see my RAM threw the case window but I'm not sure about

air cool because of this (chunky air cooler cover up the RAM). The price range between good air cooler and liquid cooler is pretty simliar. I am thinking about Be Quiet Pro 3 air cooler VS Corsair H100i and the price range of them is pretty similar.

[AlwaysFSX]

These are fun.

 

Couple of things, I'll try to put them in order of importance but that may get thrown out the window.

1. The 650D was replaced by the 750D from Corsair because the 650D is originally a piece of junk. Get  a 750D instead.
2. You cannot really define a "better" motherboard other than durability, in which the one you've chosen is solid and likely won't break. If it has the features you will use at the price you want, with the looks you'd prefer, go for it. Companies like MSI, ASUS, ASRock, and Gigabyte all make excellent quality motherboards.
3. Air cooling can be as effective as liquid cooling, it just depends on which you'd rather spend money on. Liquid coolers tend to be more silent but have more points of failure.
4. For RAM, just get an 1866MHz kit instead as you'll see little benefit from the increased speeds making it not really worth the money.
5. You do not need a ton of fans in your computer to keep it cool, you'll just be adding more noise. A few that can move air will work just fine, even at low RPMs.

Thermal paste is a viscous paste meant to help heat transfer from the CPU to the cooler so the energy can be put in the air and not your system. Pretty much all coolers you can buy come with pre-applied thermal paste so you do not need to buy any, or worry about it.

[Not a Black]

These are fun.

 

Couple of things, I'll try to put them in order of importance but that may get thrown out the window.

1. The 650D was replaced by the 750D from Corsair because the 650D is originally a piece of junk. Get  a 750D instead.
2. You cannot really define a "better" motherboard other than durability, in which the one you've chosen is solid and likely won't break. If it has the features you will use at the price you want, with the looks you'd prefer, go for it. Companies like MSI, ASUS, ASRock, and Gigabyte all make excellent quality motherboards.
3. Air cooling can be as effective as liquid cooling, it just depends on which you'd rather spend money on. Liquid coolers tend to be more silent but have more points of failure.
4. For RAM, just get an 1866MHz kit instead as you'll see little benefit from the increased speeds making it not really worth the money.
5. You do not need a ton of fans in your computer to keep it cool, you'll just be adding more noise. A few that can move air will work just fine, even at low RPMs.

Thermal paste is a viscous paste meant to help heat transfer from the CPU to the cooler so the energy can be put in the air and not your system. Pretty much all coolers you can buy come with pre-applied thermal paste so you do not need to buy any, or worry about it.

isn't 750D too big? because I'm trying to avoid big ass cases

[Not a Black]

These are fun.

 

Couple of things, I'll try to put them in order of importance but that may get thrown out the window.

1. The 650D was replaced by the 750D from Corsair because the 650D is originally a piece of junk. Get  a 750D instead.
2. You cannot really define a "better" motherboard other than durability, in which the one you've chosen is solid and likely won't break. If it has the features you will use at the price you want, with the looks you'd prefer, go for it. Companies like MSI, ASUS, ASRock, and Gigabyte all make excellent quality motherboards.
3. Air cooling can be as effective as liquid cooling, it just depends on which you'd rather spend money on. Liquid coolers tend to be more silent but have more points of failure.
4. For RAM, just get an 1866MHz kit instead as you'll see little benefit from the increased speeds making it not really worth the money.
5. You do not need a ton of fans in your computer to keep it cool, you'll just be adding more noise. A few that can move air will work just fine, even at low RPMs.

Thermal paste is a viscous paste meant to help heat transfer from the CPU to the cooler so the energy can be put in the air and not your system. Pretty much all coolers you can buy come with pre-applied thermal paste so you do not need to buy any, or worry about it.

Also, any recomandation for the fan splitters and air cooler?

[AlwaysFSX]

isn't 750D too big? because I'm trying to avoid big ass cases

The 750D is only a few millimeters bigger than the 650D.

 

Also, any recomandation for the fan splitters and air cooler?

Both of those can be bought buy Notcua, they have a 3 pin or 4 pin fan splitter. As for an air cooler you can get their NH-D15 for great performance.