GeForce 8800 with GeForce 7300

I'm looking for some advice... I am planning on purchasing a 30in LCD (Samsung 305T) and I'm wondering if I should upgrade my current GPU (GeForce 7300) to the GeForce 8800. Or if the 7300 is capable of driving the 30in monitor.
My next question is whether or not I can re-utilize my existing GeForce 7300 GPU's with the 8800. If the 8800 is that much better than the 7300 I would like install the 8800 and connect the new 30in monitor to it. Then connect my existing 2 x 24" LCD's to the 7300 GPU's (one each, I have 2 x 7300).
Will this be possible?
Most of my time on the system is spend using standard desktop application like MS Office (70%). The rest of the time I spend in Aperture and Final Cut.
Thanks in advance...

I don't see the 7300GT on Apple Store, but Nvidia specifies:
Dual-link DVI capability to drive the industry's largest and highest resolution digital flat panel displays up to 2560x16001
So if you plan on only using a single 30", you are fine, but if you feel you need an upgrade graphics, the Radeon 2600XT would be my first choice actually. People are generally happy as a replacement for 7300 or even x1900. The first revisions had a noisy fan, but so too would the 8800GT. Two dual link DVI ports
http://store.apple.com/us/product/MB198Z/A
Someone last night said their 7300 and 8800 'don't get along' and having trouble, though it seems it should but make sure you get the right card.
And there is the Radeon 3870.
http://www.barefeats.com/harper16.html
http://www.barefeats.com/harper15.html
Even the 2600 can be used if you have Leopard.
Comparing 2600 to 8800.
http://www.barefeats.com/harper8.html

Similar Messages

Problems with 3D Hardware acceleration on nVidia geForce 7300

I have a system with a Core 2 Duo CPU and a nVidia geForce 7300 graphic card. I am trying to run a 3D robotics simulation program (Webots 7.0.3) and its performance is abysmal. I never had graphic performance issues before---but then again, I never tried to run this particularly intensive simulation software. Other simulation software compiled from source (e.g. player/stage ) runs smoothly.
Where can I start to look to find out where the problem is?
Here is what I've been able to find out so far:
1. Hardware acceleration seems to be enabled:
[stefano@polus]$ glxinfo | grep -n5 "direct rendering"
1-name of display: :0
2-display: :0 screen: 0
3:direct rendering: Yes
4-server glx vendor string: NVIDIA Corporation
5-server glx version string: 1.4
6-server glx extensions:
7- GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_SGIX_fbconfig,
8- GLX_SGIX_pbuffer, GLX_SGI_video_sync, GLX_SGI_swap_control,
2. glxgears reports very poor performance: about 60FPS. The software manufacterer says their product needs around 2000FPS to run smoothly
[stefano@polus]$ glxgears
Running synchronized to the vertical refresh. The framerate should be
approximately the same as the monitor refresh rate.
301 frames in 5.0 seconds = 60.157 FPS
299 frames in 5.0 seconds = 59.781 FPS
3. The software (i.e. Webots) is proprietary, and their linux version is built against libjpeg version 6.2. Archlinux currently runs libjpeg 8, so I had to manually install the older version.
4. The software runs satisfactorily on my Kubuntu laptop, an old Lenovo T61 which has similar (or similarly aged) hardware. In other words, the CPU seems to be adequate and the prolem lies with the graphic setup in my Archlinux system, I believe.
5. I read the nvidia pages on the Arch website, the nvidia-linux pages and the Xorg pages on how to set up xorg.conf. It did not help.
Some info on my system are appended below.
Any hint greatly appreciated.
Stefano
Hardware
CPU Version: Intel(R) Core(TM)2 Duo CPU E6550 @ 2.33GHz
Graphic card: nVidia GeForce 7300/Gt/Pci/SS2
RAM: 4 GB
Double monitor setup with Xinerama enabled
SW:
Archlinux 64 bits
Kernel: Linux 3.6.11-1-ARCH
Graphic driver: nvidia304xx

chris_l wrote:
stefano wrote:
2. glxgears reports very poor performance: about 60FPS. The software manufacterer says their product needs around 2000FPS to run smoothly
Running synchronized to the vertical refresh. The framerate should be
approximately the same as the monitor refresh rate.
301 frames in 5.0 seconds = 60.157 FPS
Why you get 60FPS? you have your answer there.
I noticed that and was wondering about it. I am not familiar with glxgear at all and I am not sure about the exact meaning of the statement about framerate. But one of the developers of the software I am trying to run sent me this glxgear output, obtained on a recent Ubuntu system running under VMWare (on a Windows host, I presume):
$ glxgears
11030 frames in 5.0 seconds = 2205.791 FPS
11492 frames in 5.0 seconds = 2298.289 FPS
What gives? Are they running a different version of glxgears or is there some hidden switch in glxgears that unties it from monitor refresh rate and makes it work as a benchmark tool (man glxgears did not report any)?

Expanding Mac Pro video card with (non-stock) GeForce 7300 GT?

OK, I've done some Googling and can't really find what I'm looking for, so I thought I would pose the question here as I continue to search around. Here's the situation:
I have a late 2007 Mac Pro with a GeForce 7300GT graphics card that has been working just fine
I wanted to add an additional card in order to output to a TV in my office, so I figured I'd just look for another 7300GT
Found one: http://www.ebay.com/itm/121062296751?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m149 7.l2649
Bought it, installed it. Nothing.
I feel like I should know this already, but does it really matter who the manufacturer is as long as the chipset is the 7300GT? Is there anything I can do to get this situation working or was I a little hasty in buying a card that I didn't fully understand?
Like I said, I'll keep searching around, but any help that anyone could provide would be much appreciated.

The card you have already has two ports on it, and can support two displays at once, according to Apple:
PCI Express graphics
NVIDIA GeForce 7300 GT 256MB (single-link DVI and dual-link DVI)
To convert DVI to HDMI for a TV, all you should need is a DVI --> HDMI cable.
If you are going to buy a new card, the Apple-firmware 5770 (as hatter recommends) can replace your current 7300 card. Works in all models of mac Pro. Accelerated drivers in 10.6.5 and later.
• Only genuine Apple cards are guaranteed to show a picture at power on.
• PC cards flashed with Apple firmware may not show a picture until the login screen, making debugging difficult when your Mac will not boot right up.
• PC-only cards will not show a picture under Mac OS X.
• Note: [This may be changing with some advanced NVIDIA cards in to 600 and 700 series, but they are overkill for this application.]

Dual 23'' with NVIDIA GeForce 7300 GT

I want to know if I can drive 2 23" inch displays on a Mac Pro 8 core with the stock NVIDIA GeForce 7300 GT at full resolution or do I need to get a second card. My monitors are not the new ones with the aluminum finish, they are a generation or two behind, they are the ones that have the white plastic frame.
Thanks

The card can drive two monitors. Only one can be 30". The two 23" will be fine, but you will need two DVI to ADC adapters if they are ADC (Apple Display Connector) models.
<http://www.ramelectronics.net/assets/images/DVI/adcmale.jpeg>
<http://store.apple.com/1-800-MY-APPLE/WebObjects/AppleStore.woa/wa/RSLID?mco=18 72D402&nplm=M8661LL/B>

Mac Pro With Geforce 7300 and hdtv

Hello,
I wanted to ask if anyone knew if i could buy a dvi to hdmi cable to use with my Mac Pro/Geforce 7300? My tv does not have a dvi port that is why i wanted to use the cable. However i know the tv adapter apple sells do not work for my gpu. Also if the cable works will i get true hd video or because my gpu is not a hd video card will not play hd video well? Thank you very much for the help.

http://discussions.apple.com/click.jspa?searchID=4182635&messageID=4185093

Nvidea GeForce 7300 GT and ati hd 5870 issues with mac pro and dual monitors etc

I have a mac pro 1,1 running 10.5.8
Model Name:          Mac Pro
Model Identifier:          MacPro1,1
Processor Name:          Dual-Core Intel Xeon
Processor Speed:          2.66 GHz
Number Of Processors:          2
Total Number Of Cores:          4
L2 Cache (per processor):          4 MB
Memory:          8 GB
Bus Speed:          1.33 GHz
I installed an ati 5870 and fcp 7 wont run, it says no vram. so I reinstalled the NVIDIA GeForce 7300 GT. This card however doesnt support my 46" sony bravia client monitor via vdi to hdmi (with adapter) is there anyway to make it do that (patch, driver, tweek to card)? also what other card should I get that will support the 30" apple display and the sony. I have another system luckily thats newer that I work on with clients, but I dont want to foresake the other mac pro yet. is the 5770 going to work? Please let me know what you think, I greatly appreciate it. Also my system profile doesnt say I have pci express 2.0 on either my old or new mac pros.
why are there no patches for this card, updates, drivers? nada. let me know. thank you.

*Is it possible to run the factory NVIDIA 7300 GT side-by-side with an ATI Radeon HD 4870 to achieve a three monitor setup?*
Yes with OSX. There may be problems with Boot Camp.

Video display issues with Mac Pro and GeForce 7300?

I'm just wondering whether anyone else has experienced any video strangeness with their Mac Pros with GeForce 7300 cards? Basically, twice now I've had the mouse cursor stop responding and the entire screen turn black, then a second later everything's back to normal (with the cursor moving and the display back). I seem to recall a similar issue on my Windows PC with a Quadro FX 1100 card, so I'm hoping it's just a video driver issue.
Bryan

I am not sure if its the monitor, the MP, or the video card, but, I have had my computer completely replaced after reporting to my local Apple Store about my G5 fans over heating and my monitor either not being able to wake or refusing to sleep. I called AppleCare and did all the normal trouble shooting but they said take it in to store. But now that I have a brand new MP 3.0 I am getting the same issue but no fan noise. I have a 23Cinima HD (the strore said it was fine when they had both my computer and monitor in) but last night after hours of inactivity the monitor had the screen saver on but didn't got to sleep. I then put in to sleep but when I got up this morning I couldn't wake it up. When I got my new computer (3 days ago) I didn't migraite any of my old stuff. I have been slowly reinstalling all my software and updated anything before I install anything else as an added attempt to not have any bad files. I have 2 gig of ram and 500 hd with the 7300 card. I am at a lost I checked and rechecked all my setting. The only other thing I have connected is my airport extreme base.
Any idea's anyone?
Ops one last issue, I have blown my apartment circut breaker three time while attempting to start the new PM and once it did it when I was trying to wake it just by tapping the space bar. Is it the computer being more power hunger?
Mac OS X (10.4.8)

I have a MacPro 1,1 with a NVIDA GeForce 7300 GT, and want to set up 3 20in monitors HD, Any Ideas?

I am trying to get 3 20 inch displays to work with my MacPro 1,1 I have a NVIDIA GeForce 7300 GT video card. Does any one know what the cheapest solution is to get my configuration to work? I would like to have HD on all my screens.
Thanks,

I said it supports three. by itself.
Apple Mini DisplayPort adapters: Frequently asked questions (FAQ)
http://support.apple.com/kb/HT3382
Guide to Apple graphic display adapters needed
https://support.apple.com/kb/HT3235
Atlona (Dual Link) DVI to Mini DisplayPort Converter for Apple 27-inch LED and 27-inch iMac
http://www.atlona.com/Atlona-Dual-Link-DVI-to-Mini-DisplayPort-Converter-USB-Pow ered.html
Mac Pro (Early 2009), Mac Pro (Mid 2010), Mac Pro (Mid 2012): Issues with three displays and multiple DVI, HDMI connections
It's not the USB data that is needed to run three displays. It's the extra POWER. If you read the Apple article, they say the only solution they endorse is their US$100 Dual-Link adapters. Check the table at the end of the article.
Mac Pro (Early 2009), Mac Pro (Mid 2010): Supported display configurations

ATI Radeon 4870 HD with nVidia GeForce 7300 GT dont work

In 1st generation MacPro I have new ATI 4870 in Slot-1 and GeForce 7300 GT in Slot-4 (with second display), but applications (Cinema 4D or After Effects, for example) and Cinebench recognizing only 7300 GT card. Where may be a problem? ATI is fully recognized in profiler, but nVidia shows 0 MB VRAM or "No Display Connected"... Please, help...

Pull the 7300GT. I can find an article on Adobe support and FAQ for CS3 and later.

FCEHD compatibility with NVIDIA GeForce 7300 GT

I cannot get FCEHD to recognize my camera, JVC GR HD1U, though it works with other video import programs (iMovie HD) I have a NVIDIA GeForce 7300 GT card, and it isn't listed as compatible. Is this a different problem or is it causing my difficulty?

Start by trashing your preferences. Which version of FCE? Use the rear FW port. What drives? How's everything connected? What settings on the media? What settings in FCE?
The graphics card's not relevant.

OEM Apple nVidia GeForce 7300 GT is on Adobe's list of unsupported GPUs for Open GL rendering-

My Mac Pro's Radeon X1900 XT is retired to my computer grave yard, in my basement, but going back to the OEM Apple nVidia GeForce 7300 GT, which shipped with my Mac Pro, brought some encouraging results.
When I first got the 2007 Mac Pro, in 2009, I was running it in Mac OS 10.4.4.11 Tiger and Photoshop CS4 (11.0.0) would disable Open GL rendering when it detected the stock nVidia GeForce 7300 GT card, which was on Adobe's list of unsupported graphics GPUs. So, I purchased a refurbished Apple Radeon X1900 XT. This card allowed Photoshop CS4 and Bridge CS4 to enable Open GL Rendering. Over the last year, the Radeon X1900 XT graphics card has been creating stripes on my screen when it is running hot and sometimes the dual displays would just shut off while I was working. Also, the computer was doing hardware freezes about once a day. This morning the Mac Pro shut down it's dual displays, while I was working, and I had to do another cold shut off in order to restart. I then manually shut the computer down and did a manual boot-up so that Snow Leopard would employ disk maintenance.
I shut the computer off and pulled the Radeon X1900 XT card and re-inserted the OEM Apple nVidia GeForce 7300 GT card. Now I'm running Mac OS 10.6.8 Snow Leopard with Photoshop CS4 (11.0.2) instead of Photoshop CS4 (11.0.0).
Now, the updated Photoshop CS4, under the newer OS, is enabling Open GL rendering instead of disabling it. This graphics card's hardware limitation is now fixed, so I see no reason to buy the ATI Radeon HD 5770 Graphics Upgrade Kit for my Mac Pro:
http://eshop.macsales.com/item/Apple/6615718/
Some who have purchased the Apple ATI Radeon HD 5770 say they still got the striping on their display when the Radeon HD 5770 card was running hot, just like with the Radeon X1900 XT.
So far, the OEM Apple nVidia GeForce 7300 GT is working fine and I'm not getting any striping on my displays with no display shut-offs or hardware freezes.
I'm glad to have Adobe's Open GL rendering enabled with an OEM graphics GPU that runs cool and requires no imbedded cooling fan. Apples OEM nVidia GeForce 7300 GT, for the Mac Pro, is on Adobe's list of unsupported GPUs for Open GL rendering under Photoshop CS4, so why is it supported now? Is that just one of the benefits of the Photoshop CS4 11.0.2 update?

Chirs, thanks for your info but you are talking about Photoshop CS5, which does not support OpenGL drawing on the Mac nVidia 7300 or the Mac Radeon X1900. As long as I am using Photoshop CS4 and have not yet upgraded to CS5, I can continue to use the Mac nVidia 7300 and get limited OpenGL drawing support from Photoshop. And it is working fine.
Today I found out that Adobe has updated their OpenGL support information and apparemntly when I upgraded my Mac from Tiger to Leopard, and later, I gained Photoshop's Open GL support for the Apple nVidia GeForce 7300 GT:
Supported video cards (Mac OS)
Intel-based Macintosh, tested on Mac OS X 10.4.11 and 10.5.4
17-inch iMac x1600, 128 MB
ATI HD 2600, 256 MB
MacBook Air intel GMA X3100
Nvidia Quadrofx 4500, 512 MB
Radeon x1900, 512 MB
Intel-based Macintosh, tested on Mac OS X 10.5.4 only
8800 GT, 512 MB
iMac 8800 GS, 512 MB
Nvidia 8600M, 256 MB
The following Power PC cards work in Photoshop CS4: Nvidia 7800 (256 MB), Nvidia GeForce 7800 GT, and the Nvidia Quadro FX 4500.
Note: OpenGL is enabled for the GeForce 7300GT, but Advanced Drawing and 3D Acceleration are disabled.
So, when I upgrade to Photoshop CS5, I will need to replace my video card with something compatible with Photoshop CS5s OpenGL drawing engine. Do you think the ATI Radeon HD 5770 Graphics Upgrade Kit, for my Mac Pro, will get Photoshop CS5 to make OpenGL drawing availible and active?
I appriciate an Adobe employee, like yourself, providing the information I need to make the right hardware choices when upgrading to Adobe CS5.

HT4664 I have problem running final cut pro X because NVIDIA GeForce 7300 GT graphics card I live in a remote area what are my options to fix this ?

I have problem running final cut pro X because NVIDIA GeForce 7300 GT graphics card I live in a remote area what are my options to fix this

This is the list of Apple approved graphics, except for the cards for laptops. Replace your card with one of these. Get the best you can afford.
NVIDIA
GeForce GT 120
GeForce GT 130
GeForce GTX 285
GeForce 8800 GT
GeForce 8800 GS
Quadro FX 4800
Quadro FX5600
ATI
Radeon HD 4670
Radeon HD 4850
Radeon HD 4870
Radeon HD 5670
Radeon HD 5750
Radeon HD 5770
Radeon HD 5870

Kernel Panic caused by Nvidia GeForce 7300 GT after Upgrade

Kernel Panic caused by Nvidia GeForce 7300 GT after Upgrade
Mac Pro 2,66 Ghz Dual Core Intel Xeon
driving 2 Apple Cinema Displays 23 (out of order since update) and 30
running Mac OS X Lion 10.7.2
Hi I'm Phil from Germany,
and I have the same problem like many others here: https://discussions.apple.com/thread/1541589?tstart=0
caused by the Nvidia GeForce 7300 GT after combined Upgrade by Apple.
Started with frozen desktop, and ended with a permanent Kernel Panic after a reeboot.
- Safe mode is not running
- System CD is not running
- Apple Hardware Test is ok.
- tried the newest 7300 firmware update
- I have double checked the RAM, and HDD and disconnected all external equipment several times.
System.log at startup ends with the folling permanent Problem:
Previous Shutdown Cause:3
NVDANV40HALG7xxx loaded and registered.
DSMOS has arrived
After running my Mac Pro in Target Mode (Fire Wire Connection with my MacBook Pro) I found the Problem-Folder of the 7300 GT:
File: HD/SYSTEM/LIBRARY/EXTENSIONS/NVDANV40HalG7xxx inside my library and erased them......
NOW MY SYSTEM IS RUNNING AGAIN, but I can't run my System-CDs without a kernel panic,
Time Machine runs without the Starfleet-Background, and my second cinema display still doesn't work any more!
After spending several hours in front of my Mac Pro I'm sure that all of my hardware works fine.
NOW I THINK THE PROBLEM IS: I have to change my ROM-Version on my Nvidia GeForce 7300 GT and install the Firmware 3008.
So how does it work and where can I get this Firmware? Or how can I run an Downgrade from 3011 to 3008?
ANY IDEAS ....or similar cases?
WOULD BE GLAD TO GET SOME HELP!!!!!

Thanks Hatter
I'm sure that an ATI 5770 would solve my Problem...and maybe I could save a lot of my time?
But why I should spend 250 € on a new Graphic Board when the old one isn't broken?
Especially when the problem wasn't caused by me.
I need the old firmware, because my System runs with my GT 7300 after removing the software part listed above. Only one of the firmware components that had been updated won't fit in connection with the newer OS X Versions.
I'm also sure that the Problem must be on the Graphic Board, because my System-CD isn't running while pushing the "c" button.

4x NVIDIA GeForce 7300 GT cards in a Mac Pro run below max supported speed

Hi,
We have 4 "identical" NVIDIA GeForce 7300 GT 256MB cards in one Mac Pro (to support 8 DVI monitors for a Network Operations Center). One card came with the system, the other cards were purchased from Apple at the same time. This was a refurbished computer, so we didn't have the build-to-order option. I put identical in quotes because they seem to have different ROM revisions.
The system mainly shows graphs on webpages and HP OpenView (via X11), so no heavy-duty gaming or refreshes.
We have been running with 6 monitors for the past 4 months with the following monitors:
- 1x 42" LCD with 1280x768, 32 bit color, DVI
- 5x 22" LCD with 1680x1050, 60Hz, 32 bit color, DVI
When I restart the system, at least one of the 22" monitors takes 5 or 10 minutes of flashing on then off (mostly off) before it finally syncs up and shows a constant image. The 42" LCD won't go to its native resolution (can't recall what that is right now), so have to go down to a less optional 1280x768. In the next day or so, I'll be connecting one more identical 22" LCD and then soon after another 42" monitor, but am wondering if they will work. Yesterday, I saw a post about firmware update for this video card (http://www.apple.com/support/downloads/geforce7300gtfirmwareupdate.html). I also noticed that two of the cards have ROM Revision 3008 and two have 3011 ROM Revision of the cards (in System Profiler). I'm not sure yet if this firmware update increases the ROM Revision.
Running the Expansion Slot Utility (/System/Library/CoreServices/) shows that my PCI Express profile is set to Two x8 Lane + Two x4 Lane slots. All slots say that they are running below maximum speed.
The store.apple.com site still shows this configuration as a valid build-to-order, but I wonder if they do something different or extra.
Does anyone else have experience with 4 of these video cards with this many monitors?
Any experience with the Firmware Upgrade that I should know about?
Thank for any insight!

l_elephant wrote:
I notice that the flasher is connected to a card with ROM revision 3011, the later one.
I noticed this too.
now, to the slot profiles.
you say;
"The first one that I enter is the one to the right (looking from the back of the system)."
so you mean that the mac is laying on its side and your in the back, and what you call 'slot 1' is to the right? is that correct?
No, the system is upright, but the cards are horizontally seated. Pardon my ascii art, but here's the layout if I look from the back of the Mac Pro:
| DVI DVI ---->> slot 4
| DVI DVI ---->> slot 3
| DVI DVI ---->> slot 2
| DVI DVI ---->> slot 1
So, there are two DVI ports on each card (which is in a slot). I'm not sure which lane is which.
Either the left (as pictured) is lane 1, or the right (as pictured) is lane 2.
i ask because i'm wondering if your reproducing the way the expansion slot utility is graphically portraying it. I'm pretty sure the utility is showing the slots as if the mac is upright and the person is looking into the side of it with the access panel off.
Okay, sounds logical!
if you say that you have two x4 lanes and two x8 lanes, then i'm deducing that your flasher is on an x4 lane, and as it is, one of your x8 lanes has only one lonely monitor on it.
Probably correct.
In my utility window, it is the fourth configuration, so you would have at the moment;
slot4__x4__22" and 22"
slot3__x4__42" and 22" flasher
slot2__x8__22" and empty
slot1__x8__22" and 22"
I think that you have 2 and 3 reversed.
i would suggest trying the third configuration thusly;
slot4__x8__22" and 22"
slot3__x1__22" and empty
slot2__x8__42" and 22" flasher
slot1__x8__22" and 22"
in other words, check off the third configuration in the utility, then
exchange the connections on the second and third cards, leaving the first and fourth cards be.
Okay, will do.
as far as running below max speed, i figure as long as your workload doesn't suffer, then its fine.
Oh, and another question, does it always, always flash when you boot-up?
Do you guys shut down the system every night?
We rarely reboot it, and I'm not the only one that would see it reboot. This system is in a 24x7 Network Operations Center. I just know that rebooting takes a while for the monitor to come up all of the way.
Thanks for all of your help and guidance so far!
David

GeForce 7300 GT Upgrade Kit for Mac Pro?? G5?

Hi,
Just found this on the apple store:
http://store.apple.com/Apple/WebObjects/ukstore.woa/wa/RSLID?mco=1643C421&nplm=M A567
"NVIDIA GeForce 7300 GT Graphics Upgrade Kit for Mac Pro"
Why is it only for mac pro? its PCI express & my g5 is one of the late 2005 models and it has PCI Express so am i wrong in thinking that this should work fine or is it something to do with the new intel architecture?
If i remember correctly i could have chosen this card or a very similar one when i configured my G5.
Thanks

That card is only for the Mac Pro, as it says.
When you ordered your G5, you had the choice of the nVidia 6600 (or 6600LE), nVidia 7800GT, or the Quadro FX 4500.
The 7800GT that you could have ordered with your G5 is close in performance to the ATi X1900XT that is an option on the Mac Pro. The 7300GT that you're looking at is an entry level card, which the 7800GT definitely is not.
The 7300GT and the X1900XT are both Mac Pro only due to the ROM on the card, which is designed to work with the EFI booting hardware that the Mac Pro uses. The G5s used Open Firmware, which requires a different ROM on the video card. So, even though both your G5 and the Mac Pro are PCI-Express based, these video cards are not compatible.
Now, most PCI-Express cards that you look at for, say, external SATA, will probably work in both the G5 and the Mac Pro. You'd still want to check the specs to be sure, however.
If you're looking for a new video card to replace your (presumably) nVidia 6600, your only real option is the ATi X1900 G5 edition. This is a different card than the X1900XT that's offered for the Mac Pro.

GeForce 8800 with GeForce 7300

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