I7 5820k vs 6700k

[GAM8LE]

Hi everyone,

Im looking to upgrade the following in October/November(current rig in signature):

• CPU
• Motherboard
• RAM
• GFX cards

I am pretty much set on what gfx cards I'm going to get but the main dilemma for me is the CPU which will then determine the motherboard and RAM I go for.

So as the title states - out of the 5820k and 6700k which would be best?

Price for either is irrelevant as there is only around £18 difference and I have a good budget for motherboard and RAM so this is the main dilemma.

So OCUK - which CPU?

Thanks

 

[Caracus2k]

if you do anything that benefits from more than 4 cores / 8 threads (i.e. video editing)consider the 5820K otherwise consider saying yourself about a hundred pounds towards something else/ your next upgrade and buy a 6600k and a Z170 board

Personally between the 5820k and the 6700k I would take the 5820k as I believe the higher core count and amount of PCI-e lanes on X99 is of more future benefit than the higher clocks on Skylake

 

[hobib_ali]

true, that's what I spent like a week staring at this site and various others, tough choice for me, choose the newer quad core 6700 or the hex 6 core 5820, both cpu's were in the region of 300 squids...

I chose the X99 5820 set up due to more pcie slots on mobos and a faster stronger cpu with more cores, much better for overclocking too, note that on a 5820 you cant gor more than a 2 gpu set up, I was happy with 1 at the mo, possibly ti in sli in the future

the mobos on skylake are cheaper too which is a bonus, also I think you can have a higher amount of ram too,

ive just upgraded from a x58 set up so the x99 was a more natural choice for me...

why don't you look at the choice of motherboards and prices too...

 

[C64]

I'd go with a 4790k Z97 or 6500k + z170 setup it's just so much cheaper so that's more money for the gpu department.

I'd rather have 4690/4790 + gtx 980 ti and 8gb ram than 6700k 5820k 16gb + ram and gtx 970 if that makes sense.

An overlcoked 4790k is right up there with the 5820 and 6700 they are barely better than one for much more money.

 

[setter]

Got a 4790k here, at 4.7 it matches a 4.5 6700k. Built an X99 5820k rig to replace the 4790k. Will be interesting to compare. I went X99 as I got a very good deal on the parts.

 

[GAM8LE]

true, that's what I spent like a week staring at this site and various others, tough choice for me, choose the newer quad core 6700 or the hex 6 core 5820, both cpu's were in the region of 300 squids...

I chose the X99 5820 set up due to more pcie slots on mobos and a faster stronger cpu with more cores, much better for overclocking too, note that on a 5820 you cant gor more than a 2 gpu set up, I was happy with 1 at the mo, possibly ti in sli in the future

the mobos on skylake are cheaper too which is a bonus, also I think you can have a higher amount of ram too,

ive just upgraded from a x58 set up so the x99 was a more natural choice for me...

why don't you look at the choice of motherboards and prices too...

Thanks! I believe tri sli for a 5820k is max due to having 28pci lanes. Most tri sli boards state its x16/x16/x8, x8/x8/x8. Irrelevant as I would be sticking with sli anyway.

I was looking at motherboards and ram as well last night but only for x99 so I will do a price/performance comparison tonight and make two baskets to see the difference.

I'd go with a 4790k Z97 or 6500k + z170 setup it's just so much cheaper so that's more money for the gpu department.

I'd rather have 4690/4790 + gtx 980 ti and 8gb ram than 6700k 5820k 16gb + ram and gtx 970 if that makes sense.

An overlcoked 4790k is right up there with the 5820 and 6700 they are barely better than one for much more money.

Thanks! I have pretty much decided to go sli 980ti regardless of what other choices I make so I'm leaving that cost out of this decision and also will be going for 4x4gb at least regardless as well.

I don't think I would go for 4790k as even if it does overclock to match, this will be my last major upgrade for a few years.

Got a 4790k here, at 4.7 it matches a 4.5 6700k. Built an X99 5820k rig to replace the 4790k. Will be interesting to compare. I went X99 as I got a very good deal on the parts.

That will be interesting to hear your report!

Overall, gfx card decision and ram amount is decided so for me, its the motherboard and cpu choice!

As I mentioned above, I will do two baskets tonight to compare and post it up.

Too much choice lol

 

[GAM8LE]

So my initial x99 basket was the following:

CPU:Intel i7-5820K 3.30GHz
Mobo: Asus TUF X99
RAM:Avexir Core White Series 32GB (4x8GB)
Total:£751.51 from OCUK

My Z170 basket is the following:
Intel Core i7-6700K
Asus Maximus VIII Hero Intel Z170
Avexir Core White Series 32GB (4x8GB)
Total:£659.57 from OCUK

So lets call it an even £100 saving going Z170 which seems quite good, but then:

Pros for x99
CPU:
6 cores, 12 threads vs 4 cores 8 threads
More overclocking on 5820k

Motherboard choices:
X99 RUF board supports sli at x16 each or tri SLI @ x16/x16/x8 whereas the z170 supports SLI only at x8/x8 with no tri SLI option unless you spend more money than x99 boards.
More RAM slots

Pros for Z170
CPU - slightly cheaper
Motherboard - higher memory speeds supported out of the box

I think based on this exercise my mind is made up. Im going to go x99 mainly for the fact I mentioned this will be my last big upgrade in a few years.

If I want more RAM - I can add it on x99 as I will still have 4 free RAM slots. If I want another GFX card - I can do it on x99 to make it tri SLI and if I want to overclock, from what I have read x99 handles it better.

£100 more seems worth it

Thanks for your help folks, hopefully will be buying it in October/November

 

[passey89]

So my initial x99 basket was the following:

CPU:Intel i7-5820K 3.30GHz
Mobo: Asus TUF X99
RAM:Avexir Core White Series 32GB (4x8GB)
Total:£751.51 from OCUK

My Z170 basket is the following:
Intel Core i7-6700K
Asus Maximus VIII Hero Intel Z170
Avexir Core White Series 32GB (4x8GB)
Total:£659.57 from OCUK

So lets call it an even £100 saving going Z170 which seems quite good, but then:

Pros for x99
CPU:
6 cores, 12 threads vs 4 cores 8 threads
More overclocking on 5820k

Motherboard choices:
X99 RUF board supports sli at x16 each or tri SLI @ x16/x16/x8 whereas the z170 supports SLI only at x8/x8 with no tri SLI option unless you spend more money than x99 boards.
More RAM slots

Pros for Z170
CPU - slightly cheaper
Motherboard - higher memory speeds supported out of the box

I think based on this exercise my mind is made up. Im going to go x99 mainly for the fact I mentioned this will be my last big upgrade in a few years.

If I want more RAM - I can add it on x99 as I will still have 4 free RAM slots. If I want another GFX card - I can do it on x99 to make it tri SLI and if I want to overclock, from what I have read x99 handles it better.

£100 more seems worth it

Thanks for your help folks, hopefully will be buying it in October/November

5820k can only do 8/8/8 not 16/16/8.

It can also inly tri sli on certain motherboards.

But yeh id say x99

It also has quad memory whereas the z170 is only dual channel.

 

[GAM8LE]

5820k can only do 8/8/8 not 16/16/8.

It can also inly tri sli on certain motherboards.

But yeh id say x99

It also has quad memory whereas the z170 is only dual channel.

https://www.overclockers.co.uk/showproduct.php?prodid=MB-638-AS&groupid=701&catid=5&subcat=2875

Multi-GPU Support Supports NVIDIA® 3-Way SLI™ Technology
28-Lane CPU-
3 x PCIe 3.0/2.0 x16 ( x16, x16/x8

That's the one I want to get, is that the speed standalone or is that with SLI?

 

[Joe!]

What's with the motherboard on X99? I don't really think it's worth the extra £80 (or £120 compared to something like the X99 SLI) which alleviates the difference in cost.

Or you could get OcUK's Gigabyte bundle which is £440 for a 5820k + Gigabyte motherboard.

YOUR BASKET
1 x Gigabyte X99-SLI - Intel Core i7 5820K Six Core CPU & Motherboard Bundle ***50 Saving*** £441.98
Total : £451.58 (includes shipping : £8.00 Ex.VAT).



Only real downside is the aesthetics (personal thing), and a slower M.2 slot on Gigabyte boards.

 

[GAM8LE]

What's with the motherboard on X99? I don't really think it's worth the extra £80 (or £120 compared to something like the X99 SLI) which alleviates the difference in cost.

Or you could get OcUK's Gigabyte bundle which is £440 for a 5820k + Gigabyte motherboard.

YOUR BASKET
1 x Gigabyte X99-SLI - Intel Core i7 5820K Six Core CPU & Motherboard Bundle ***50 Saving*** £441.98
Total : £451.58 (includes shipping : £8.00 Ex.VAT).



Only real downside is the aesthetics (personal thing), and a slower M.2 slot on Gigabyte boards.

It was the aesthetics to be honest but if I decide not to worry about that then this would maybe be the option:

Intel i7-5820K 3.30GHz £311.99
MSI X99A SLI Plus Intel X99 (Socket 2011) DDR4 ATX Motherboard MSI X99A SLI Plus Intel X99 (Socket 2011) DDR4 ATX Motherboard £179.99
Avexir Core White Series 32GB (4x8GB) £149.99
Total : £651.56

But tbh, the budget on it wasn't my main concern. I had decided on around £800 initially for RAM(16gb)/Mobo/CPU but just wanted to know what best to go for out of x99 and z170.

Althought not that I have changed the mobo I could slot in a 5830k...No, No...wont do it lol

Stupid choices...first world problems

 

[passey89]

That's the one I want to get, is that the speed standalone or is that with SLI?

Thats the speed with a 5930k or 5960x as they both have 40 lanes

The 5820k only has 28.

 

[GAM8LE]

Thats the speed with a 5930k or 5960x as they both have 40 lanes

The 5820k only has 28.

here is the full description from the OCUK listing:

40-Lane CPU-
3 x PCIe 3.0/2.0 x16 (x16, x16/x16, x16/x16/x8)
28-Lane CPU-
3 x PCIe 3.0/2.0 x16 ( x16, x16/x8, x16/x8/x4)

So that means to say 40 late supports tri x16 whereas 28 lane x16/x16/x8

Correct me if im wrong but that's what im getting from the listing

 

[Joe!]

It was the aesthetics to be honest but if I decide not to worry about that then this would maybe be the option:

But tbh, the budget on it wasn't my main concern. I had decided on around £800 initially for RAM(16gb)/Mobo/CPU but just wanted to know what best to go for out of x99 and z170.

Althought not that I have changed the mobo I could slot in a 5830k...No, No...wont do it lol

Stupid choices...first world problems

If you only plan on going 2 way SLI there is absolutely no advantage of the 5930k compared to the 5820k - unless you plan on adding a lot of expansion cards in or something. - With 2 way SLI you'll have 4 PCI-e lanes left over, which is enough for an M.2 SSD.

For the same price, 5820k is the smarter choice in my opinion - 2 more cores, 4 more threads, for 300MHz less core clock. For £100 more I would've probably still gone for the 5820k to be honest. More lanes, more room for expansion, etc. I chose the 5820k because some things may not use 6 cores, or 12 threads, but if something does, you have them there for X program/game to use.

It's up to you at the end of the day to be honest - For £800 it's more than a healthy budget to go down either route.

here is the full description from the OCUK listing:

40-Lane CPU-
3 x PCIe 3.0/2.0 x16 (x16, x16/x16, x16/x16/x8)
28-Lane CPU-
3 x PCIe 3.0/2.0 x16 ( x16, x16/x8, x16/x8/x4)

So that means to say 40 late supports tri x16 whereas 28 lane x16/x16/x8

Correct me if im wrong but that's what im getting from the listing

Okay that means:

If you have one GPU, the lanes will be "split" x16 (but not split cause there's nothing to split)

If you have two GPUs, the lanes will be split x16, x8 - Leaving 4 lanes.

If you have three GPUs, the lanes will be split x16, x8, x4 - However, NVidia GPUs require a minimum of 8 lanes to operate in SLI so it would not be possible to tri-SLI as the 3rd slot would only be operating at x4 speed.

 

[passey89]

here is the full description from the OCUK listing:

40-Lane CPU-
3 x PCIe 3.0/2.0 x16 (x16, x16/x16, x16/x16/x8)
28-Lane CPU-
3 x PCIe 3.0/2.0 x16 ( x16, x16/x8, x16/x8/x4)

So that means to say 40 late supports tri x16 whereas 28 lane x16/x16/x8

Correct me if im wrong but that's what im getting from the listing

No 40 lanes is 16/16/8

28 lanes is 16/8/4 so cant sli tri only dual

The gigabyte x99 sli i have will do 8/8/8

 

[GAM8LE]

If you only plan on going 2 way SLI there is absolutely no advantage of the 5930k compared to the 5820k - unless you plan on adding a lot of expansion cards in or something. - With 2 way SLI you'll have 4 PCI-e lanes left over, which is enough for an M.2 SSD.

For the same price, 5820k is the smarter choice in my opinion - 2 more cores, 4 more threads, for 300MHz less core clock. For £100 more I would've probably still gone for the 5820k to be honest. More lanes, more room for expansion, etc. I chose the 5820k because some things may not use 6 cores, or 12 threads, but if something does, you have them there for X program/game to use.

It's up to you at the end of the day to be honest - For £800 it's more than a healthy budget to go down either route.

Okay that means:

If you have one GPU, the lanes will be "split" x16 (but not split cause there's nothing to split)

If you have two GPUs, the lanes will be split x16, x8 - Leaving 4 lanes.

If you have three GPUs, the lanes will be split x16, x8, x4 - However, NVidia GPUs require a minimum of 8 lanes to operate in SLI so it would not be possible to tri-SLI as the 3rd slot would only be operating at x4 speed.

Nah 5830k, I was only messing. lol

Thanks for that though, this is great.

No 40 lanes is 16/16/8

28 lanes is 16/8/4 so cant sli tri only dual

The gigabyte x99 sli i have will do 8/8/8

Makes sense thanks. What board do you have?

To you both - leaving the RAM choice out of it - what would be your choice of Motherboard for SLI normally, but also the possibility of Tri SLI in the future? OR would you recommend I don't bother looking at the possibility of tri SLI at all, but focus on the upgradability and affordability of SLI when new cards come out?

I feel the latter will be the recommendation due to the wider choice of boards with better pricing I would have

 

[passey89]

Nah 5830k, I was only messing. lol

Thanks for that though, this is great.



Makes sense thanks. What board do you have?

To you both - leaving the RAM choice out of it - what would be your choice of Motherboard for SLI normally, but also the possibility of Tri SLI in the future? OR would you recommend I don't bother looking at the possibility of tri SLI at all, but focus on the upgradability and affordability of SLI when new cards come out?

I feel the latter will be the recommendation due to the wider choice of boards with better pricing I would have

Tbh i got mine knowing it could run 2 but only chrcked today that it could do 3 way.

Tbh the x99 are all enthusiat grade anyway so most if them have tough parts.

I love my gigabyte x99 sli was the bundle from ocuk got it for £399.99 when it was on offer a couple weeks ago.

Mines iverclocks to 4.5ghz easily.

 

[Joe!]

I personally wouldn't bother with tri SLI - I don't think the benefits are worth how much you end up spending on the card... And at the moment, I wouldn't even suggest SLI 980Tis. I would get a single 980Ti, save £550 and use that until next May~ when Pascal comes out as Pascal is rumoured to be a 50%+ increase over current gen GPUs. I can't imagine a single 980Ti is going to struggle in the next 8 months unless you are playing at 4k and refuse to use less than Ultra settings

I picked my board based on features I wanted. A full speed M.2 SSD slot, inbuilt WiFi + Bluetooth and 2 way SLI, and of course, white aesthetics. I ended up with an Asus X99-Pro. - I advise you mock up what you want, and do the same

 

[ukxenon]

I am going same route as OP I am opting for the 5i20k

 

[GAM8LE]

I personally wouldn't bother with tri SLI - I don't think the benefits are worth how much you end up spending on the card... And at the moment, I wouldn't even suggest SLI 980Tis. I would get a single 980Ti, save £550 and use that until next May~ when Pascal comes out as Pascal is rumoured to be a 50%+ increase over current gen GPUs. I can't imagine a single 980Ti is going to struggle in the next 8 months unless you are playing at 4k and refuse to use less than Ultra settings

I picked my board based on features I wanted. A full speed M.2 SSD slot, inbuilt WiFi + Bluetooth and 2 way SLI, and of course, white aesthetics. I ended up with an Asus X99-Pro. - I advise you mock up what you want, and do the same

How are you finding that board? I have heard horror stories about the bios etc. Did it require you to setup anything to get it to run right?

And I agree with the gpu thing. Time to rethink this lol At least I know now I want to go x99 so that makes it a bit easier