OcUK RX6700XT review thread

Grim5 · 18 Mar 2021 at 20:35

KompuKare said:
CB did some CU scaling of RNDA vs RNDA2 vs GCN (represented by Hawaii) all locked to 1GHz to try to do an IPC comparison:
https://www.computerbase.de/2021-03/amd-radeon-rdna2-rdna-gcn-ipc-cu-vergleich/

As it happens Hawaii and Navi 22 have the same (main) bandwidth

Of course, the three card do not run at the same clock and Navi 10 vs Navi 22 is also 256 bit vs 192 bit.
So not entirely sure what these tests prove but a nice effort anyway.

rdna2 ipc is not lower than rdna1 so that test has some issues

KompuKare · 18 Mar 2021 at 21:04

Grim5 said:
rdna2 ipc is not lower than rdna1 so that test has some issues

I suspect running them all at a locked 1GHz has issues anyhow.
The Infinity Cache presumably is tied to the clock speed and Navi 22 had less bandwidth without it.
Infinity Cache messes everything up in this kind of test.
Ignoring latencies and any possible wait states, for Hawaii and Navi10 they could have downclocked the memory to provide the same bandwidth, but for Navi 22 that is impossible unless dividers etc. are exposed with some tool which could disable the Infinity Cache.
And there's the age-old question: what is IPC anyway?
To test it, should clocks, memory bandwidth, ROPs, etc. all be equal?
But those are areas where architectural changes are usually made so if the tests change that, what are the testing?

Grim5 · 18 Mar 2021 at 21:09

KompuKare said:
I suspect running them all at a locked 1GHz has issues anyhow.
The Infinity Cache presumably is tied to the clock speed and Navi 22 had less bandwidth without it.
Infinity Cache messes everything up in this kind of test.
Ignoring latencies and any possible wait states, for Hawaii and Navi10 they could have downclocked the memory to provide the same bandwidth, but for Navi 22 that is impossible unless dividers etc. are exposed with some tool which could disable the Infinity Cache.
And there's the age-old question: what is IPC anyway?
To test it, should clocks, memory bandwidth, ROPs, etc. all be equal?
But those are areas where architectural changes are usually made so if the tests change that, what are the testing?

For CPU IPC testing, its easy to measure. For GPU's its harder due to a million variable like you mentioned, most likely GPU IPC is actually just estimates calculated using internal engineering software (there is software where you can design your own PCB, input all the engineering values and components on the PCB and your architecture modelling and the software can then estimate a bunch of stuff like TDP, Performance etc and even tell you if your design doesn't work, like putting components in the wrong place)

KompuKare · 18 Mar 2021 at 21:15

nthlord said:
This GPU situation must be having a huge detrimental knock on effect on all pc parts being sold especially users just wanting a display output from their shiny Ryzen systems unless they fall back on their old GPU.

Well, some previous shortage showed how shortages of low margin stuff (which usually used to be RAM) can affect the sales of the high margin stuff.
However, I guess that didn't mean that RAM manufacturers were pursuaded to increase volumes and damage their margins so that Intel could have another record year.

wilm · 19 Mar 2021 at 09:43

Think i got quite lucky yesterday, and managed to bag one of the Hellhound's from overclockers at £479 yesterday afternoon, which was delivered first thing this morning! Bit more than i would've wanted to have paid, especially for this card. But i've been on the lookout for ages now, so i'll take what i can get as i've been wanting to build a new pc for ages now. Now the fun begins with speccing the rest of my pc - should be a decent upgrade from my old zotac 1070 at least!

calken · 19 Mar 2021 at 14:08

wilm said:
Think i got quite lucky yesterday, and managed to bag one of the Hellhound's from overclockers at £479 yesterday afternoon, which was delivered first thing this morning! Bit more than i would've wanted to have paid, especially for this card. But i've been on the lookout for ages now, so i'll take what i can get as i've been wanting to build a new pc for ages now. Now the fun begins with speccing the rest of my pc - should be a decent upgrade from my old zotac 1070 at least!

Like many, I'm only able to check at certain times of the day between meetings - it's a real luck of the draw.

My requirement is for a USB-C and it looks like I'm really running out of options as they are phasing them out on cards.

xb8browney · 19 Mar 2021 at 21:12

Didn't realise it was 2 8 pin connectors, finally retiring an old ocz psu in my wife's computer. She's upgrading from a 1060 6gb.

ICDP · 20 Mar 2021 at 08:49

What an overpriced pile of junk this GPU is.

d_brennen · 20 Mar 2021 at 08:53

Yep, midrange card at basically the same price as a new console :rolleyes:

don't even get a free controller.

It's not a bad product, it's a bad price.

ICDP · 20 Mar 2021 at 08:56

It's more that AMD are now offering similar performance, with less features and asking for more money than Nvidia (3060Ti). Nice sell AMD, we give you less for more money. Go **** yourselves AMD.

AMD's new slogan, "Making Nvidia look like good value".

mikehhhhhhh · 20 Mar 2021 at 09:00

ICDP said:
What an overpriced pile of junk this GPU is.

Do you feel the same about AIB 3060ti and 3070s?

ICDP · 20 Mar 2021 at 09:04

mikehhhhhhh said:
Do you feel the same about AIB 3060ti and 3070s?

I did until AMD said "hold my pint Nvidia". I am talking about MSRP pricing of course.

mikehhhhhhh · 20 Mar 2021 at 09:16

ICDP said:
I did until AMD said "hold my pint Nvidia". I am talking about MSRP pricing of course.

I know 8+ people that tried to get a 6700xt from a competitor on launch day at £425 delivered and all got one - including me for a friend.

It seems like if you wanted one, you could get one at or around MSRP on the day.

I don't know many people who managed to get an FE card at MSRP, besides a couple of 3090s.

Grim5 · 20 Mar 2021 at 09:20

d_brennen said:
Yep, midrange card at basically the same price as a new console don't even get a free controller.

It's not a bad product, it's a bad price.

More expensive than the consoles down under, the only 6700xt in stock is $200AUD higher than the PS5

StarShock · 20 Mar 2021 at 10:31

The sad truth is that it would be a bad deal if you could buy a 3060ti at msrp... unfortunately there have been basically zero 3060tis sold at or even close to MSRP so it all becomes an argument about what's real and what isn't.

So for me its really great that AMD have actually managed to put out a mid sized fairly power efficient GPU that can go toe to toe with last gens flag ship, first time in almost half a decade that there is genuine performance parity at all levels. And I can't wait for the day when either crypto crashes or something new comes out that makes mining on any current GPU a waste of time, and the market is flooded with GPUs and we can actually buy any graphics card at a reasonable price. But right now the market is so broken that the only factor that matters in picking your next GPU is what you can actually get your hands on

Game · 20 Mar 2021 at 12:10

found some 3060 oc's for £267 today how do they compare

humbug · 20 Mar 2021 at 12:24

Game said:
found some 3060 oc's for £267 today how do they compare

Game · 20 Mar 2021 at 12:27

will stick to my rx5700 for now then

humbug · 20 Mar 2021 at 12:28

Game said:
will stick to my rx5700 for now then

Oh yeah.

LoadsaMoney · 20 Mar 2021 at 13:16

You've gota laugh