3x 6970 vs 2x 6970 + 6990 (p67)

SeeThruHead · Apr 13, 2011

I've been looking around benchmarks all over the web and can't find a clear much info on this. The two main issues I can't find much info on is how well does a 6990 (at 6970 clocks) run on pci-e 8x? And whats the average scaling from going from 3 6970 gpus to 4.

Things to consider:
If the 6990 is bottlenecked by 8x pci-e how much would putting it into a nf200 slot help to alleviate that.

EDIT: I found this for anyone who's interested that pretty much solves some of my concerns

This shows very small performance loss when running a 6990 on 16x 8x and even 4x.

BigTerminator · Apr 17, 2011

3 6970 GPU's is pretty much going to be the best in terms of value and performance. In 6990 crossfire reviews with 4 GPU's enabled, many of the games showed minimal improvement or even lost performance. 3 GPU's is the most really that will scale well for most games. And the can pretty much run anything, even multi monitor setup. Go 6990 + 6970.

pwnmachine · Apr 17, 2011

Personally a single 6990 or dual 6970's will be more than enough performance for ALL games. Anything more you are wasting money, I would suggest a single 6990 or crossfire 6970/6950 then possibly adding another card later down the road.

But in terms of tri crossfire setups the governor hit it on the head.

hajalie24 · Apr 17, 2011

pwnmachine said:
Personally a single 6990 or dual 6970's will be more than enough performance for ALL games. Anything more you are wasting money, I would suggest a single 6990 or crossfire 6970/6950 then possibly adding another card later down the road.

But in terms of tri crossfire setups the governor hit it on the head.

Not in eyefinity resolutions.

SeeThruHead · Apr 17, 2011

I currently have a 6970 and it's not really cutting it performance wise on my 1680x1050 so the plan is to get a 6990 for tri fire which should be good enough for the new monitor I'm getting (2560x1600) I've also heard that the 6990 quadfire is the best setup for eyefinity. I think that's due to the crossfire cable bandwidth issue that triple + card solutions have.

here: quad 6990

vs

pwnmachine · Apr 17, 2011

hajalie24 said:
Not in eyefinity resolutions.

Indeed, but OP did not mention anything about a multi-monitor setup.

SeeThruHead · Apr 17, 2011

pwnmachine said:
Indeed, but OP did not mention anything about a multi-monitor setup.

precisely, although it's a consideration. But really performance of two 6990's on 5760x 1080 doesn't really look as good as I'd want, not to mention to monitor bevel annoyance. a 6970 + 6990 saves me about 100 on a waterblock vs 3x 6970 and if i do want to move to multi monitor eventually selling the 6970 and picking up another 6990 would be my best bet. anyway thanks for the advice.

Janus67 · Apr 17, 2011

I thought I read that you can't combine a 6990 with anything else but another 6990, so adding a 6950/6970 is not possible with that card.

SeeThruHead · Apr 17, 2011

^not true you can crossfire any 6000 series gpu's together

http://www.hardocp.com/article/2011/04/11/amd_radeon_69906970_crossfirex_trifire_review/9

Janus67 · Apr 17, 2011

Well I'll be damned, there ya go

BigTerminator · Apr 17, 2011

SeeThruHead said:
I currently have a 6970 and it's not really cutting it performance wise on my 1680x1050 so the plan is to get a 6990 for tri fire which should be good enough for the new monitor I'm getting (2560x1600)

If a 6970 can't cut it performance wise on a 1680x1050 screen then either it's being bottlenecked or you are crazy :screwy:

. My 5770 ran very well on 1680x1050, I'm at 1920x1080 with my 6970, how is it not good enough? Maybe Metro 2033 and Crysis doesn't run at 60fps but most games do. And for 2560x1600 you will need maximum a 6990 or 6970 crossfire. Anything more is a waste of money and the scaling gets really bad. Triple GPU's only for eyefinity, other than that, it's overkill.

SeeThruHead · Apr 18, 2011

I'm doing an upgrade to everything other than the vid card soon so well see if there's a bottle neck. as for performance it's mostly great, but there are some games i have that i still can't turn settings on full and get acceptable numbers in my minimum fps which is what i really care about. games that i can't turn everything up high include stuff like: bulletstorm, dragon age II, metro 2033 crysis etc.

alexdt256 · May 13, 2011

SeeThruHead said:
I'm doing an upgrade to everything other than the vid card soon so well see if there's a bottle neck. as for performance it's mostly great, but there are some games i have that i still can't turn settings on full and get acceptable numbers in my minimum fps which is what i really care about. games that i can't turn everything up high include stuff like: bulletstorm, dragon age II, metro 2033 crysis etc.

(dragon age II, metro 2033, crysis) actually stress my 2x6990 very well ... I got a good fps I never have any drop in fps but Ive tried with only one 6990 and in dragon age 2 and metro 2033 I got some drop in fps also you have to be sure that nothing is bottleneck your 6990 Ive learn that my cpu was and I had to OC it a lot to see the 2 beast working ! Its crazy how they make video card that need cpu power that you cant buy so you have to OC.

terran2k · May 13, 2011

what cpu do you have and what speed is it running? how much ram do you have?

3x 6970 vs 2x 6970 + 6990 (p67)

SeeThruHead

Member

BigTerminator

Member

pwnmachine

Member

hajalie24

Member

SeeThruHead

Member

pwnmachine

Member

SeeThruHead

Member

Janus67

Benching Team Leader

SeeThruHead

Member

Janus67

Benching Team Leader

BigTerminator

Member

SeeThruHead

Member

alexdt256

Member

terran2k

Member

Similar threads