Seeing as prices on the 5850 are coming down now (~£80 on ebay for a used one) im thinking of going CF.
In the next few days im going to be upgrading to -
i5-2500k (Getting it to 4.8ghz i hope!)
Asus P8P67 LE
My current PSU is hyper type-M 580w.
Would i be able to run a crossfire rig with that CPU and mobo without a hitch or should i upgrade to a 6970/gtx 580?
Hiya, I run my rig (sig) with a ANTEC TP650 at the moment while i wait on the delivery ofANTEC 1000W Quattro - they are both flashed to 6970 specs and my TP-650 is great.... no problems atall..
I was seeing that they are going to start shipping in march so likley april.... so i would hold off... but thats just me being carefull with my cash !
It would be better answered if you update your sig rig with what kind of PSU you are running.
A crappy 580wt may only reliably deliver 400-450wt, whereas a quality 580 may deliver up to 650 or more if needed.
As I just posted in another thread, 16x-4x results in a loss of about 5% on the 2nd card.
It's in no way worth buying a new mobo for, unless you are just really anal about getting the absolute most performance possible. http://www.techpowerup.com/reviews/A...caling/25.html
As I just posted in another thread, 16x-4x results in a loss of about 5% on the 2nd card.
It's in no way worth buying a new mobo for, unless you are just really anal about getting the absolute most performance possible. http://www.techpowerup.com/reviews/A...caling/25.html
Those aren't even cfx results.
I can tell you from firsthand experience that the 4x slot is a handicap when running cfx.
Granted that most of the time without an fps counter you wouldn't notice.
I'll use BC2 as an example, I experienced many noticeable slowdowns at 16x/4x, 8x/8x exhibited no such slowdowns.
Originally Posted by grunion;12303110
Those aren't even cfx results.
I can tell you from firsthand experience that the 4x slot is a handicap when running cfx.
Granted that most of the time without an fps counter you wouldn't notice.
I'll use BC2 as an example, I experienced many noticeable slowdowns at 16x/4x, 8x/8x exhibited no such slowdowns.
Post all the "hard evidence" you want, I know what I experienced, the bandwidth discrepancy can be unkind to my cards.
Compared to h220wnzj00 numbers, I saw twice the % loss that he experienced.
Vantage 36098 vs 32009, gpu score, total isn't relevant.
JC2 103 vs 92
Those are the only 2 test we have in common.
But like I said not noticeable for the most part unless you look at numbers, but BC2 was the exception.
It just ridiculous to tell a person to go ahead and get a 16x/4x board when they plan on running crossfire.
It's ridiculous to get a 16x/4x board, based upon your personal observations versus several sites showing that the performance difference is, at most, 5%?
I'm not saying that you didn't see what you claim to have seen, but you have to admit that it would be a stretch to dismiss several well respected sites conclusions based upon one persons negative personal experience.
Anyway, I expect we will continue to see more tests of this nature as more people, like myself, upgrade with the 16x/4x boards that they have handy.
As soon as AM3+ boards are available for a decent price, I'll try to get my hands on a 16x/16x and use everything else from my current setup, (barring RAM of course), to see what, if any, discrepancies I can reproduce.
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