DC7900 two PCI-E slots (3058 Views)
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Occasional Advisor
fanyunjia
Posts: 11
Registered: ‎02-01-2005
Message 1 of 15 (3,058 Views)

DC7900 two PCI-E slots

I just got a new DC7900 and want buy a new graphics card for it. I found there are two PCI-E slots I can insert graphics card. May I know if they are same and can I plug new graphics card into the white one because it has more space for a big graphics card.

thanks for the help
Honored Contributor
Rich S
Posts: 11,869
Registered: ‎07-03-2005
Message 2 of 15 (3,058 Views)

Re: DC7900 two PCI-E slots

Either one should work... use the one that fits the best.


Check your bios after you insert the new card.

It should be seen there.



http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c01563106/c01563106.pdf


PC homepage

http://h20000.www2.hp.com/bizsupport/TechSupport/Home.jsp?lang=en&cc=us&prodTypeId=12454&prodSeriesI...〈=en&cc=us



Rich


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Daniel Potyrała
Posts: 488
Registered: ‎02-11-2008
Message 3 of 15 (3,058 Views)

Re: DC7900 two PCI-E slots

Hi fanyunjia,
Yes You can, but....
The white one is PCI Express x16 expansion slot that is downshifted to a x4 slot.
The black one is 3 PCI Express x16 expansion slot.

So if yourr card is x16 or grater then x4 it's better to put it in the black slot. Because You will be having much more greater performance on it.

For more details about speed check this link:
http://pl.wikipedia.org/wiki/PCI-E

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Occasional Advisor
fanyunjia
Posts: 11
Registered: ‎02-01-2005
Message 4 of 15 (3,058 Views)

Re: DC7900 two PCI-E slots

so that means the the white slot is 4X PCI-E slot not a real 16X PCI-E slot?

what's the normal PCI-E interface of Graphics cards like GTX 260/280 or HD4850/4870? can they works on that white slot and DC7900?

thanks a lot for your further help
Honored Contributor
Rich S
Posts: 11,869
Registered: ‎07-03-2005
Message 5 of 15 (3,058 Views)

Re: DC7900 two PCI-E slots

Sorry, link broke...


per HP, they are both 2 PCIe-x16 slots...

http://tinyurl.com/ader2w

ref J41 and J42..


they will both work as full 16x slot...



Rich



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Honored Contributor
Rich S
Posts: 11,869
Registered: ‎07-03-2005
Message 6 of 15 (3,058 Views)

Re: DC7900 two PCI-E slots

The 2 slots are as follows:

1 PCI Express x16 expansion slot
2 PCI Express x16 expansion slot that is
downshifted to a x4 slot



NOTE: You can install a PCI Express x1, x8, or x16 expansion card in the PCI Express x16 slots.


For dual graphics card configurations, the first (primary) card must be installed in the PCI Express x16
slot that is NOT downshifted to a x4 slot.




Only for dual graphics do you have to worry about which slot to use....



per page 20:


http://tinyurl.com/dn5wru





Rich




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Honored Contributor
Daniel Potyrała
Posts: 488
Registered: ‎02-11-2008
Message 7 of 15 (3,058 Views)

Re: DC7900 two PCI-E slots

To Rich: Why are you writing two times the same informations. I wrote it in my post once and it enough. It's not the first time You do things like that. Be normal not freak.
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Rich S
Posts: 11,869
Registered: ‎07-03-2005
Message 8 of 15 (3,058 Views)

Re: DC7900 two PCI-E slots

Clarity my friend.... clarity...



Rich
Occasional Advisor
fanyunjia
Posts: 11
Registered: ‎02-01-2005
Message 9 of 15 (3,058 Views)

Re: DC7900 two PCI-E slots

thanks for your reply, I have assigned one point for you two, small enourage xixi

but I'm still worry about it because I just checked the mother board again, it remarked PCI-E 4X on the left of the white PCI-E slot.

I really hope the next generation of HP DC series have a clear support high performance graphices card with enough room and slots even it is business PC.
Honored Contributor
Rich S
Posts: 11,869
Registered: ‎07-03-2005
Message 10 of 15 (3,058 Views)

Re: DC7900 two PCI-E slots

As I stated, either slot can be used with a PCIe 16x graphics card per HP.

see documentation links above...


Only when you use a "dual" graphics card, the primary card has to be inserted in the first slot.


Rich
Honored Contributor
Daniel Potyrała
Posts: 488
Registered: ‎02-11-2008
Message 11 of 15 (2,822 Views)

Re: DC7900 two PCI-E slots

Hi,

Nvidia (go to the specifications both x16)

GeForce GTX 260:
http://www.nvidia.com/object/product_geforce_gtx_260_us.html

GeForce GTX 280:
http://www.nvidia.com/object/product_geforce_gtx_280_us.html

Ati

HD4850/4870 (both x16)
http://ati.amd.com/products/radeonhd4800/specs.html

Black slot is for 100% x16 as we wroted.
So You will have without a problem max peformances of those cards on this model.

Rich:
I'm not fighting with You it was just a comment. I hope You know that. It wasn't offensive. If you will look to our posts maybe you will understand what I was trying to say.

reagards
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Honored Contributor
zhanggr
Posts: 4,381
Registered: ‎04-04-2001
Message 12 of 15 (2,822 Views)

Re: DC7900 two PCI-E slots

365W Power Supply of dc7900CMT has no 6-Pin PCI-E Power Connecter for VGA Adapter!
Half soft Half hard
Occasional Advisor
fanyunjia
Posts: 11
Registered: ‎02-01-2005
Message 13 of 15 (2,822 Views)

Re: DC7900 two PCI-E slots

Hi, I'm back, today I made a small test on my DC7900. I borrowed one old be PCI-E Graphics card NV 7800GT. I inserted it into the left black PCI-E slot and run 3DMark06 and COD5, it is about 1100 score and 15 FPS. then I inserted it into the right white PCI-E slot and run 3DMark06 again. now it's only 570 score and 5 FPS. so sad for the result. this means indeed the white slot is 4X PCI-E slot and my high performance Graphics card dream broken because the black slot only can support single slot adapt cards.

I really hope HP new generation business PC can support current popular graphices cards.

anyway I would like to thanks all above guys who help me to the answer
Occasional Advisor
fanyunjia
Posts: 11
Registered: ‎02-01-2005
Message 14 of 15 (2,822 Views)

Re: DC7900 two PCI-E slots

P.S. 6-Pin PCI-E Power Connecter is not a problem because I can find a convert from 4-pin driver connector to 6-Pin PCI-E Power Connector
Honored Contributor
Daniel Potyrała
Posts: 488
Registered: ‎02-11-2008
Message 15 of 15 (2,822 Views)

Re: DC7900 two PCI-E slots

Hi,
So You can close this thred and assign real points

couse:
o N/A: The answer was simply a point of clarification to my original question

o 1-3: The answer didn't really help answer my question, but thanks for your assistance!

o 4- 7: The answer helped with a portion of my question, but I still need some additional help!

o 8-10: The answer has solved my problem completely! Now I'm a happy camper!

and I think then we have solved it.

regards
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