Sapphire HD4850 Crossfire Results

[rob[GL]]

Gigabyte X48-DQ6 Mainboard
Intel E8400 Processor (450x9)
4GB Patriot XLL DDR2 Memory
640GB WD HDD 32MB cache
1TB Samsung HDD 16MB cache
700W OCZ Game Extreme Power
Zalman CNPS7500CU LED Cooler
Sapphire Radeon 4850 PRO 512MB (x2)
Coolermaster Centurion 534 Case

[perkam]

What are your GPU clocks m8 0_o

Perkam

[rob[GL]]

For 3dm05+3dm06 the cards were run at 690/1150 each
For 3dmVantage the cards were run at stock - because even the slighest overclock caused massive artifacting.

CPU was 450x9 for all tests.
RAM was 900MHz @ 5-5-5-15

[fubarswe]

nice lil machine u got there! :-)

[rob[GL]]

I'm building another one today... Hopefully with 4870's this time.

[perkam]

I'm building another one today... Hopefully with 4870's this time.

PSSSST, go at least 5Ghz if you don't want to bottleneck the two 4870s.

Perkam

[iTravis]

PSSSST, go at least 5Ghz if you don't want to bottleneck the two 4870s.

Perkam

This statement makes me feel really bad about my Q6600@ 3.6Ghz.....
To OP: Nice result you got there, I'm thinking of getting one HD4850 for my 2nd rig as well and OC it to heaven.

[Bubbaxm2]

I just picked up two of these saphire cards myself. Can't wait to get them in my rig!

[perkam]

This statement makes me feel really bad about my Q6600@ 3.6Ghz.....
To OP: Nice result you got there, I'm thinking of getting one HD4850 for my 2nd rig as well and OC it to heaven.

It's because he's on a dual core. A quad would need around 4.2 to achieve similar result.

Perkam

[S1mon-]

Nice results mate. Now I must decide if I should go single 4870 or 4850 CF :S

[Bubbaxm2]

Sweet, I just nailed 20000 on my first run.

[Jim Morbid]

Great results!

The video card market is really heating up atm. new releases and price drops every other day making pulling the trigger so very very difficult.

This thread here has def. helped me on my decision path CF ftw!

JM

[Bubbaxm2]

A screeny for the non believers. lol Everything was at default of course.

By bubbaxm2 at 2008-07-15

[[XC] gomeler]

Looking good, now ramp up the clocks to 700/1100 and see that score jump

[XCheater]

If only I can OC it to 3.7GHz

[emoners]

I'm building another one today... Hopefully with 4870's this time.

can 700w handle 4870 CF?

[rob[GL]]

Ended up going with a PCP&C 750W for the second rig I built... Handled the dual 4870's no problem.

[Kain XS]

are both CF Bridges necesary for the crossfire mode?
I mean, 3gpu crossfire needs 2 bridges, why 2gpus need also 2 bridges?
ANyone tried that?

[[XC] gomeler]

are both CF Bridges necesary for the crossfire mode?
I mean, 3gpu crossfire needs 2 bridges, why 2gpus need also 2 bridges?
ANyone tried that?

Not necessary. In testing I noticed a marginal(1-2% difference) between 1 bridge and 2 bridges however such a small difference is easily within the margin's of error. I believe only 1 bridge is used to communicate.

[Kain XS]

Not necessary. In testing I noticed a marginal(1-2% difference) between 1 bridge and 2 bridges however such a small difference is easily within the margin's of error. I believe only 1 bridge is used to communicate.

Thanks Golemer, I might try it then. Tomorrow some 3D bench.
Thanks

[Astri]

Im running 2x3870 with 1 bridge , i think its the same for 2x4850

[rob[GL]]

Both bridges are there, so I installed them, it looks cool... Why not?
What are you GAINING by removing 1 bridge? Nothing.

[XCheater]

A screeny for the non believers. lol Everything was at default of course.

By bubbaxm2 at 2008-07-15

I don't believe this one

[Slovnaft]

has anybody tried crossfiring 4850 and 4870?
will this work well?

[Bubbaxm2]

I don't believe this one

Why not?