Crossfire 6950

Masterdeadly · 8 Sep 2011 at 23:23

Got my 6950 back yesterday system is running fine ran prime95 my amd 955 black edition at 3,61ghz running at 50 idle then 60 after 40 minutes at full load my gpu was at 40-50 idle 75 on heaven benchmark but the fan was only has 50 percent if I was to crossfire will I need more fans and have to adjust the fan speeds on the cards if so how

Surveyor · 9 Sep 2011 at 00:02

The fan speeds on the HD 6950's should speed up automatically as the GPU temperature rises.

tommybhoy · 9 Sep 2011 at 01:20

If the gpu's in xfire get too hot, most people use an Antec SpotCool:

http://www.overclockers.co.uk/showproduct.php?prodid=SY-000-AN

Is your 6950 ok after all?

fowler002 · 9 Sep 2011 at 01:56

could you not simply have bumped one of your other 100 or so threads about the 6950 xfire(yes a huge exaggeration on my part)?

Masterdeadly · 9 Sep 2011 at 06:57

Got banned for bumping - fowler002

My GPU is fine seems to be a lot nosier than it was before, that doesn't bother me and I think I will order this - http://www.overclockers.co.uk/showproduct.php?prodid=SY-000-AN along with my Sapphire 1gb 6950 was curious how I power it?

Surveyor - When I ran a benchmark was at 800mhz and 1250mhz as it should be but the fan speed was only at 50 percent I believe. and it was hitting 75 degrees. Cards Idle temp is around 40 when booted but after games it sits on 60 probably just cooling down but I played for 30 minutes then a 10 min break all night so I probably didn't give it enough time for it to settle.

Masterdeadly · 9 Sep 2011 at 11:33

Any suggestions?

fowler002 · 9 Sep 2011 at 11:43

I was looking at getting one of those fans awhile back, think you plug it into one of the fan headers on the board.

75oc isn't anything to worry about, I have the 2gb toxic(880mhz core, 1300mem) and that hits 86oc

you can use msi afterburner(or sapphire trixx) to set speed up the fans a bit more than 50%, but it'll be louder.

Masterdeadly · 9 Sep 2011 at 12:19

Noise I don't care about

I'll just up the fans to 80 percent when I crossfire and see the temperatures if they are above 90 I'll buy that fan I'll ask overclockers how to install/fit it onto my system

tommybhoy · 9 Sep 2011 at 13:20

You just screw it into one of the case motherboard headers(where you screw a motherboard into place on the case, there will be extra screw holes), and point it where you want it to go. It doesn't get any easier than that.

Masterdeadly · 9 Sep 2011 at 13:35

Where Abouts in the case should I put it and someone said to me my 955 black edition at 3.61ghz will this bottleneck 2 6950's

tommybhoy · 9 Sep 2011 at 14:01

Yellow circle is where it has been attached to the cases mb header hole.

Green arrow is an empty case mb header.

The top card usually gets hotter, so this is the most common place to sit the spotcool in dual card mode.

The green circle would be another place to point the fan too.

The beuty of the spotcool is that you can bend it to blow air on different places until you find the best place to suit your setup.

Masterdeadly · 9 Sep 2011 at 14:49

What about the bottlenecking

tommybhoy · 9 Sep 2011 at 15:16

Compared to if you had an 2500K@5GHz, yes there will be a bottleneck, it won't be massive though in some games. Most games run at a high enough fps anyway.

But you would have to spend about another ~£280 to get rid of it.

Masterdeadly · 9 Sep 2011 at 15:20

Ah so i'll be getting around 90 percent performance with each card running at x8/x8 Speed?

tommybhoy · 9 Sep 2011 at 16:44

Overclock your cpu more to compensate, 3.8 to 4GHz is achievable with your cpu.
Check threads in the cpu section, information is there on how to do it if you are unsure.

Surveyor · 9 Sep 2011 at 16:49

Masterdeadly said:
Ah so i'll be getting around 90 percent performance with each card running at x8/x8 Speed?

Mid 90's.

PCIe Scaling Summary

Masterdeadly · 9 Sep 2011 at 16:52

Surveyor I'm taking into account the CPU bottlenecking and Won't it void the warranty overclocking my CPU more and it's a 60 degrees at 100 percent load after 40 minutes which is bearing on acceptable

Surveyor · 9 Sep 2011 at 17:12

Masterdeadly said:
Surveyor I'm taking into account the CPU bottlenecking and Won't it void the warranty overclocking my CPU more and it's a 60 degrees at 100 percent load after 40 minutes which is bearing on acceptable

Your post referred to the difference running at x8/x8 and that is what my answer referred to, it had nothing to do with CPU bottlenecking.

All you're doing is guessing at there being a CPU bottleneck and then guessing the amount of the bottleneck if it exists.

If your CPU was part of a pre-overclocked bundle or system then overclocking it further probably technically voids that part of the warranty.

If there's an overclocked profile saved in the BIOS then you can always revert back to that if you need to and who's to be any the wiser?

Of course overclocking further is always dependent on safe voltages and temperatures.

Ovr · 9 Sep 2011 at 18:12

Are you < 10 years old? Genuine question @Masterdeadly.

Masterdeadly · 9 Sep 2011 at 18:17

I'm 15, I'm just awful with computers, as you can tell.