Obsidian
<Bronze Donator>
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Well you can actually sort of tell what everything is by looking at the pics of the build. Seems like they picked pretty good parts across the board except for maybe the power supply, but I can actually just reuse my existing PC Power and Cooling 1000W 80+ Gold. This is what the prebuilt PC is (and apparently I don't get how to do links on this forum, but the price is lowest on pcpartpicker):
CPU:Intel Core i7-5820K 3.3GHz 6-Core Processor $379
CPU Cooler:Corsair H55 Water/Liquid CPU Cooler $49
Motherboard:MSI X99A SLI PLUS $229
Memory:Corsair Vengeance $184 (it's actually not this particular set, but you can tell by the picture that it's some variety of Corsair Vengeance and this is the cheapest available for arguments sake)
Storage:SAMSUNG Data Center 240GB SSD $139
Storage:Seagate Barracuda 3TB HD $84 (you can't tell what this component is again, so I'm just listing the cheapest 3TB HD available)
Video Card:MSI GTX 980 4GD5T OC 4GB $513
Case:Rosewill Stryker M $65
Power Supply:Cougar SL600 600W PSU $56
Optical DriveAsus DRW-24F1ST DVD/CD Writer $18
OS:Windows 10 Home 64 bit $91
KB/MouseThermaltake Commander Bundle $20
Wireless Adapter:Belkin N150 Wireless Adapter $6
Your build doesn't include the 3TB HD ($84), the DVD drive ($18), the OS ($91), the KB/Mouse ($20) or the Wireless Adapter ($6). It also reduces the RAM by half (might not make a difference, but minimum $65 difference). It improves the SSD (-$20) and improves the graphics card (-$93). The cost difference of these parts is in favor of the prebuilt by $171 and your build is still $100 more (so theoretical $271 difference). Also the processor in your build is a 4 core, whereas the prebuilt is a 6 core. You have one of the cheapest coolers available in your build, while the prebuilt has a (hypothetically) better liquid cooler. With the liquid cooler, I'd imagine that the prebuilt could be overclocked to reach the same 4.0 ghz as your processor, and it would have the advantage of 6 vs 4 cores. I know that doesn't really make a huge difference right now (in gaming at least), but in my minimal amount of research it sounds like additional cores may have a benefit in dx12. Also the x99 chipset apparently supports quad channel ram vs dual channel ram in the z170. I have no idea if this has any tangible benefits, but I'll throw it out there. Maybe I'm crazy but it still seems to me like the prebuilt is a better buy, especially considering some of these options I threw on the prebuilt were the lowest cost option available which might not be what's actually in there.
CPU:Intel Core i7-5820K 3.3GHz 6-Core Processor $379
CPU Cooler:Corsair H55 Water/Liquid CPU Cooler $49
Motherboard:MSI X99A SLI PLUS $229
Memory:Corsair Vengeance $184 (it's actually not this particular set, but you can tell by the picture that it's some variety of Corsair Vengeance and this is the cheapest available for arguments sake)
Storage:SAMSUNG Data Center 240GB SSD $139
Storage:Seagate Barracuda 3TB HD $84 (you can't tell what this component is again, so I'm just listing the cheapest 3TB HD available)
Video Card:MSI GTX 980 4GD5T OC 4GB $513
Case:Rosewill Stryker M $65
Power Supply:Cougar SL600 600W PSU $56
Optical DriveAsus DRW-24F1ST DVD/CD Writer $18
OS:Windows 10 Home 64 bit $91
KB/MouseThermaltake Commander Bundle $20
Wireless Adapter:Belkin N150 Wireless Adapter $6
Your build doesn't include the 3TB HD ($84), the DVD drive ($18), the OS ($91), the KB/Mouse ($20) or the Wireless Adapter ($6). It also reduces the RAM by half (might not make a difference, but minimum $65 difference). It improves the SSD (-$20) and improves the graphics card (-$93). The cost difference of these parts is in favor of the prebuilt by $171 and your build is still $100 more (so theoretical $271 difference). Also the processor in your build is a 4 core, whereas the prebuilt is a 6 core. You have one of the cheapest coolers available in your build, while the prebuilt has a (hypothetically) better liquid cooler. With the liquid cooler, I'd imagine that the prebuilt could be overclocked to reach the same 4.0 ghz as your processor, and it would have the advantage of 6 vs 4 cores. I know that doesn't really make a huge difference right now (in gaming at least), but in my minimal amount of research it sounds like additional cores may have a benefit in dx12. Also the x99 chipset apparently supports quad channel ram vs dual channel ram in the z170. I have no idea if this has any tangible benefits, but I'll throw it out there. Maybe I'm crazy but it still seems to me like the prebuilt is a better buy, especially considering some of these options I threw on the prebuilt were the lowest cost option available which might not be what's actually in there.
That is not a skylake CPU, that's last gen Haswell, and not a great Haswell at that.
Here's a much better build for only ~$100 more
PCPartPicker part list/Price breakdown by merchant
CPU:Intel Core i7-6700K 4.0GHz Quad-Core Processor($399.99 @ Newegg)
CPU Cooler:Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler($24.89 @ OutletPC)
Motherboard:Asus Z170-A ATX LGA1151 Motherboard($151.99 @ SuperBiiz)
Memory:G.Skill Ripjaws 4 series 16GB (4 x 4GB) DDR4-2800 Memory($119.99 @ Newegg)
Storage:Samsung 850 EVO-Series 500GB 2.5" Solid State Drive($159.88 @ OutletPC)
Video Card:MSI GeForce GTX 980 Ti 6GB Video Card($606.98 @ Newegg)
Case:Corsair 500R Black ATX Mid Tower Case($69.99 @ Newegg)
Power Supply:SeaSonic G-750 750W 80+ Gold Certified Semi-Modular ATX Power Supply($102.99 @ SuperBiiz)
Total:$1636.70
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-11-16 17:39 EST-0500
Much better CPU, better motherboard, better SSD, better power supply, less Ram but you don't need 32GB, same video card
The problem with that prebuilt, is who knows what brand of parts could be in it. Might be a shit power supply, might be a shitty SSD, the RAM might be cheap with poor latency. Who knows.
Alternately, if you don't want to do a Skylake build, and you're ok with Haswell, you could put together a great i7 system for probably $200 less than that prebuilt with a better CPU, and better brand of parts.