Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: 6870+6770 vs 6990

03 Jun 2013   #11

Windows 10 Home Premium 64bit sp1

Quote   Quote: Originally Posted by ph0n3atic View Post
How did your 6870+6770 crossfire perform? Was your 6770 the model with 1GB DDR3? And 6870 w 1 GB DDR5 I assume?

You are the only literature on this so please let me know. Before the trolls come of course we know it is not an ideal config and that the lower bit rate of the 6770 may hinder performance. Is it possible to run the 6870 as the GPU and slave the 6770 to run strictly physics rendering? I need more general stability and would be thrilled with 10 more FPS. I know many cards can provide this with no problem but I am trying to work with these two until I find exactly what I want.

If the different memory types ddr3 v ddr5 hinder the config impossible, I would love a technical answer as to why if anyone could explain.

Please let me know what you know! I will greatly appreciate it.

**Information is the most valuable resource.**
how are those cards even compatible ?

I ran 2x 6870 Xfire and the 6770 is a newer version of the HD5770 ? I assume the 6870 is being Bottlenecked by the 6770 those cards were never ment to match up

Also comparing this set up to a 6990 is Insane that Gpu will burn the house down even with your two GPU's

Attached Thumbnails
6870+6770 vs 6990-bottlenecked.png  
My System SpecsSystem Spec
03 Jun 2013   #12

Windows 10 Home Premium 64bit sp1

I would like to also add you could do a Nvidia gpu for PhysX and HD6870 for standard play PhysX is a Cpu instruction but Nvdia Gpus have there cores built on separate technology for that purpose

I would look into maybe a 560ti and a Hd6870 it is possible to make those 2 play nice together

Hack Released to Enable PhysX on Windows 7 with ATI GPU Present | techPowerUp
My System SpecsSystem Spec
08 Jun 2013   #13

Windows 7 Ultimate Retail Box (64-bit installed) + Service Pack 1

Crossfire is MEANT for identical video cards, so is SLI.

Clown around outside that and you take your chances and likely not doing you much good at all.

I have zero personal experience on it, I get one card and all I ever need.
My System SpecsSystem Spec


 6870+6770 vs 6990

Thread Tools

Similar help and support threads
Thread Forum
New Hd 6770
I just bought a Hd 6770 and installed in a second computer. Sometimes the graphics card will turn off or there is no display on my monitor. When the computer boots the fan sounds like its running at full speed. When the graphics does work I hear it run a full speed then then it running at the...
Graphic Cards
BSODs after installing HD 6770
Hi All, Iíve come across a series of BSODs since installing my new HD 6770. A bit of googling came up with results indicating a a history of BSODs with the card. Below are the specs of my computer. CPU: AMD Phenom II X4 940 Black Edition MB: ASUS M4A78-E DDR2 Motherboard RAM: Corsair...
BSOD Help and Support
2 AMD 6970 in Crossfire or AMD 6990
I am at the point I am ready to upgrade my GPU. I have the money and I am ready to make the leap. The GPUs I am looking to get are the following: 2 x MSI R6970 Lightning or DIAMOND 6990PE54G I just want to know if I would be better off using 2 card instead of one due to the...
Graphic Cards
Hd 6990 mia?
I just went looking for a 6990 to see if the price dropped on them any. I was surprised to see that the highest card offered on newegg is now the 6970 which is what I already have. I looked some more on google and I am not able to find any new 6990 cards. Did they get pulled off the market...
Graphic Cards
AMD Radeon HD 6990 graphics card pictured AMD Radeon HD 6990 graphics card pictured - TechSpot News Source:
Graphic Cards
AMD launches dual-GPU Radeon HD 6990 graphics card AMD launches dual-GPU Radeon HD 6990 graphics card - TechSpot

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd

All times are GMT -5. The time now is 11:19.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App