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: Running at x8

16 Oct 2010   #1
tw33k

Windows 7 Ultimate (x64) SP1
 
 
Running at x8

I'm looking at getting a Radeon 5850. I have 2 x16 slots but 1 of them has a SATA 6/USB 3 card in it so the slots now have a max of x8. Will I lose much performance with this card running at only x8? I can't move the SATA card or my SSD won't perform at it's best.


My System SpecsSystem Spec
16 Oct 2010   #2
Hopalong X

Windows7 Pro 64bit SP-1; Windows XP Pro 32bit
 
 

...and the SATA card has to have the 16x lane to work right?
My System SpecsSystem Spec
16 Oct 2010   #3
tw33k

Windows 7 Ultimate (x64) SP1
 
 

Correct
My System SpecsSystem Spec
16 Oct 2010   #4
Hopalong X

Windows7 Pro 64bit SP-1; Windows XP Pro 32bit
 
 

Well they both only work at 8x if you SLI or Crossfire.

The slots are independent otherwise. You cut the performance way down using the 5850 in the 8x lane.
Might only get 50-60% of performance. Could be 70%.
If the SATA would go in the 8x you would be okay otherwise it- fill in the blank.

Looked up your mobo. I don't see a way around it.
My System SpecsSystem Spec
16 Oct 2010   #5
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

I think the consensus is you'll lose approx. 5 - 10% performance going from x16 to x8. This seems to be what's expected for the SATA card as well.

Found this:

Conclusion : PCI Express And SLI Scaling: How Many Lanes Do You Need?

A Guy
My System SpecsSystem Spec
16 Oct 2010   #6
tw33k

Windows 7 Ultimate (x64) SP1
 
 

From what I've read it seems the drop would be very minimal (2-5%) but I wanted to check here to see what others say.
Hopalong...as I said, both slots are x16 but cut down to x8 when both are used.

Thanks guys.
My System SpecsSystem Spec
16 Oct 2010   #7
Hopalong X

Windows7 Pro 64bit SP-1; Windows XP Pro 32bit
 
 

Okay.
My System SpecsSystem Spec
17 Oct 2010   #8
imeem

Windows 7 Home Premium 64-bit
 
 

well you can do a benchmark with the gpu on x16 and x8 and see how much the difference is "exactly"
My System SpecsSystem Spec
18 Oct 2010   #9
thefabe

Windows 7 ultimate 64 bit / XP Home sp3
 
 

My understanding of using the 8x bandwidth you should really only see a minimal drop in performance in highly demanding graphics games. In most circumstances fully saturating the 8x bandwidth just doesn't happen.
Then that was a few years ago before games like Crysis, Batman Arkyum Asylum, or any newer DX10 or 11 games.
I still wouldn't expect you should see any major loss of performance in most games/programs.
Fabe
My System SpecsSystem Spec
18 Oct 2010   #10
tw33k

Windows 7 Ultimate (x64) SP1
 
 

Yeah..that's my understanding too. Thanks fabe!
My System SpecsSystem Spec
Reply

 Running at x8




Thread Tools





Similar help and support threads
Thread Forum
!SASCore service running all the time, not running Superantispyware?
Found the the above service was running all the time and I only occasionally use SuperSpyware AntiSpyware as a standalone scan. This is solely as backup check to my Antimalwarebytes Pro. May I stop and disable it, and how would I remove it entirely? Thanks Glenn
General Discussion
Windows Update not running. Error Code 0xc8000247 when running SURT
Please help me out - I replaced my defective HDD with a new Samsung Spinpoint HDD, re-installed my Windows 7 image using the recovery DVDs, and can't update windows at all after that. I tried following the steps from Windows Update Posting Instructions - System Update Readiness Tool (SURT) and...
Windows Updates & Activation
Running dual Boot w/ Vista and Win 7, question on running programs
Greetings, New to the forum! I recently installed Win 7 on a second Hard drive. Is it possible to run the programs I had installed on the Vista Hard drive? Both are HD's are still installed. Thanks, Brad
General Discussion
BSOD running when running intel driver update utility and more apps
hello sorry if my post isnt great im a newbie here but for some time now ive been getting BSODs and finally figured out how to debug it with WinDbg (x86) and set the symbols for windows but i cant read the text. ive tried reinstalling my GPU and Java but no luck. when i try to run intel driver...
BSOD Help and Support
BSOD while running firefox. Computer has been running terrible.
I was not able to get perfmon /report to work, so I only have the BSOD report.
BSOD Help and Support
Two desktops running at the same time. Background programs running.
I noticed this issue a little while back. As I shutdown/restart my laptop, I notice it switches to a secondary desktop that has been running programs. A good example would be trying to open my Task Manager, I can Ctrl-Alt-Del and it will allow me to open Task Manager - however when I click on...
General Discussion

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 19:05.

Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App