RTX3080 on older PC and 3x 6pin to 8pin connectors

[kmx]

Hello

Old school PC guy and completely out of touch on this new stuff, can i get some help please.

Im looking at upgrading from a GTX1070 to a RTX3080 and before I push go, im confused on a couple of things. 

 

Performance of the card

I've got an older PC with a i7 4790k and 24GB ram. Will my CPU be fast enough to get good performance from the RTX 3080?

 

Powering the card

the version im looking at requires 3x 8pin power connectors. 

I have an older cooler master V850 with 4x 6 pin PCI power connectors only. Can I just buy 3x '6 to 8 pin' PCI power adapter cables and be ok?

 

Thanks in advance

 

[-rascal-]

4 hours ago, kmx said:

Hello

Old school PC guy and completely out of touch on this new stuff, can i get some help please.

Im looking at upgrading from a GTX1070 to a RTX3080 and before I push go, im confused on a couple of things. 

 

Performance of the card

I've got an older PC with a i7 4790k and 24GB ram. Will my CPU be fast enough to get good performance from the RTX 3080?

 

Powering the card

the version im looking at requires 3x 8pin power connectors. 

I have an older cooler master V850 with 4x 6 pin PCI power connectors only. Can I just buy 3x '6 to 8 pin' PCI power adapter cables and be ok?

 

Thanks in advance

 

 

No, the i7-4790K will heavily bottleneck the performance of a RTX 3080.

 

The CoolerMaster V850 is 6-pin on the PSU side, but should be 6+2 on the GPU end.

That is the purpose of it... you can combine the 6+2 to make an 8-pin PCI-E power connector.

Use 3x separate cables (i.e. don't daisy-chain).

 

[Mick Naughty]

A 4790k isnt even good for a 1070, so a 3080 will be a bit problem.
I only use 2x6 pins for my 3090. Psu should be perfectly fine, especially given how low the card will be performing.

[NF-A12x25]

2 hours ago, Mick Naughty said:

A 4790k isnt even good for a 1070, so a 3080 will be a bit problem.

lmao 4790k is PLENTY for a 1070, more than enough

 

Buuuuuut not a 3080, unless running games at 4k 60hz

[Mick Naughty]

1 hour ago, NF-A12x25 said:

lmao 4790k is PLENTY for a 1070, more than enough

 

Buuuuuut not a 3080, unless running games at 4k 60hz

It isnt but I get it some peoples standards are subjective.

[kmx]

8 hours ago, -rascal- said:

 

No, the i7-4790K will heavily bottleneck the performance of a RTX 3080.

 

The CoolerMaster V850 is 6-pin on the PSU side, but should be 6+2 on the GPU end.

That is the purpose of it... you can combine the 6+2 to make an 8-pin PCI-E power connector.

Use 3x separate cables (i.e. don't daisy-chain).

 

 

thanks very much, really appreciate the help

 

I suspected my old chip would be a problem.

 

I found this website that tells me how crap my CPU is with modern cards, I didnt realise it was this bad. Thanks so much everyone, I will stick with the 1070 for now and just buy a whole new computer at some stage. 

 

So glad I asked first. thanks!

 

[fonzz1e]

i would say, if yer in no hurry

upgrade you cpu & mobo 1st, since 3080 price might drop more

 

u can always use yer 4790k for unraid nas once u have a new cpu+mobo

[QuantumSingularity]

+1 to upgrade the mobo, the CPU and the memory before changing the 1070. It's still quite a capable GPU, i mean i still use mine with 5800X3D and it still hangs on. That 4790 though - you can form a memorial to it. It's a proper relic now. Get a 7600X with B650 mobo and 2x16GB DDR 5, so if after 2-3 years you want more performance you could simply drop in a new CPU and a BIOS flash. Intel 13th gen CPUs are good CPUs, BUT aren't exactly a great upgrade option because it's basically a deadend platform. Same for AM4.

[NF-A12x25]

10 hours ago, Mick Naughty said:

It isnt but I get it some peoples standards are subjective.

No, objectively it’s enough for a 1070- it is able to handle the max frames a 1070 can produce in 99% of games. Hell even a 1070-1080ti. Until you produce some objective data showing that it isn’t enough, I will go off my own testing with a 1060 6gb, a 1070 8gb, a 1070ti 8gb, and a 1080 8gb.

[QuantumSingularity]

1 hour ago, NF-A12x25 said:

No, objectively it’s enough for a 1070- it is able to handle the max frames a 1070 can produce in 99% of games. Hell even a 1070-1080ti. Until you produce some objective data showing that it isn’t enough, I will go off my own testing with a 1060 6gb, a 1070 8gb, a 1070ti 8gb, and a 1080 8gb.

Well, idk about the 4790k, but as i guy who rocked the same EVGA GTX 1070 FTW2 from Ryzen 2700X through 3600X, 3700X, 5600X and now 5800X3D i can tell you there were some pretty big jumps when i switched to each new CPU. The first big jump was 2700X to 3600X, then 3600X to 3700X was lesser one, but still in double digits, then again big jump from 3700X to 5600X and from 5600X to 5800X3D wasn't a jump - it was a rocket launch. Even when you think your GPU is more than enough for the CPU, it still matters. With all CPUs the card was 98%+ utilization, it's the CPU utilization which got lower and lower the further i moved on the ryzen line. With the 2700X it would've been basically impossible to play ACC at 1440p at anything above low to medium details. The only CPU that is from the same ballyard as the 4790k form my list is the 2700X, all of the rest are considerable step forward. At 3000 series ryzen is where Intel finally somewhat got their sh!t together and came out with the 10th gen to be compatible again. 

[Middcore]

23 hours ago, kmx said:

I've got an older PC with a i7 4790k and 24GB ram. Will my CPU be fast enough to get good performance from the RTX 3080?

No. 

 

23 hours ago, kmx said:

Powering the card

the version im looking at requires 3x 8pin power connectors. 

I have an older cooler master V850 with 4x 6 pin PCI power connectors only. Can I just buy 3x '6 to 8 pin' PCI power adapter cables and be ok?

 

Don't use old, out-of-warranty PSU's on builds you care about.

[Mick Naughty]

1 hour ago, NF-A12x25 said:

No, objectively it’s enough for a 1070- it is able to handle the max frames a 1070 can produce in 99% of games. Hell even a 1070-1080ti. Until you produce some objective data showing that it isn’t enough, I will go off my own testing with a 1060 6gb, a 1070 8gb, a 1070ti 8gb, and a 1080 8gb.

Well I'll go off my own testing, it isnt enough for a 1080ti either. Cpu is far too weak. 

[NF-A12x25]

56 minutes ago, Mick Naughty said:

Well I'll go off my own testing, it isnt enough for a 1080ti either. Cpu is far too weak. 

4790K overclocked beats i7-7700, by no means is it a weak CPU. Haswell was the best release, price-performance, until 10th gen.

[Mick Naughty]

5 minutes ago, NF-A12x25 said:

4790K overclocked beats i7-7700, by no means is it a weak CPU. Haswell was the best release, price-performance, until 10th gen.

K. 

[NF-A12x25]

Like by no means is it good enough for the 3080 or even a 2080 at anything but 4k60 or higher res, but it’s definitely more than enough for a 10 series card

[Mick Naughty]

Yea just dont play 1080p and expect high frames without pegging the cpu to 100% for any cpu intensive game. Most people tend to be 30 frame gamers nowadays.

[QuantumSingularity]

And which are these CPU intensive games? The one game that utilizes my CPU the most is ACC. In all of the others, CPU utilization is 15-20% max at 1080p, in ACC it occasionally gets to about 35%. No other game comes even close to it. That's why the X3D just decimates everything there including OC-ed 13900k.

[Mick Naughty]

4 hours ago, QuantumSingularity said:

And which are these CPU intensive games? The one game that utilizes my CPU the most is ACC. In all of the others, CPU utilization is 15-20% max at 1080p, in ACC it occasionally gets to about 35%. No other game comes even close to it. That's why the X3D just decimates everything there including OC-ed 13900k.

Any cod and most battlefield games. Only ones I play, so only ones I have to deal with. 

[kmx]

Thank you everyone