problem with hd4890 and output and GA-MS790GP-UD4h

[artdrivers]

Re: problem with hd4890 and output and GA-MS790GP-UD4h

I prefer Sapphire as well. A Radeon 4890 should be a very good card. I am in Salem. You know 360 to 460West to the other side of Roanoke. I traveled to Midlothian and Powhatan quite often.

[dukeman]

Re: problem with hd4890 and output and GA-MS790GP-UD4h

i really would like to get this card running. my powersupply is 700w and is brand new. i do not think it is that because my 8800 runs fine with either 6pin adapter off of the supply.
the sapphire runs great on another pc so that elimates the card as being the problem. i have set my bios up as was suggested earlier and it still would not post. tried both gpu slots with same results. plugged the card in and used a seperate psu for the 6pin plug-ins and still would not post. it really must be the mb. any help would be great before i return this card on monday.

[artdrivers]

Re: problem with hd4890 and output and GA-MS790GP-UD4h

OK I am just grasping for issues I have seen or heard of here.
You should clear cmos to eliminate any errors with a manual setting in bios. Plug the monitor into the dvi closest to the motherboard. Check your monitor connection. Are you using a DVI to HDMI, adapter or DVI to VGA adapter? It's rare for the adapter or cord to be bad but not impossible.

[dukeman]

Re: problem with hd4890 and output and GA-MS790GP-UD4h

tried clearing cmos, no go
using dvi on card(only one) same cord using with 8800 which is working fine.

i dont think it is the cord as the card will not even post a vid pic. the fan goes 100% on boot with no vid but the pc goes into window as i hear it doing it.

[Lsdmeasap]

Re: problem with hd4890 and output and GA-MS790GP-UD4h

Latest BIOS? Last check before you return the card I suppose.

Did you ever contact Gigabyte tech support to see if there was any known issues with that particular model? If not might as well ask
GIGABYTE - Support&Download - Technical Service Zone

[Psycho101]

Re: problem with hd4890 and output and GA-MS790GP-UD4h

You say you used a 6 pin plug from another psu to test. this would only work if you either have the PSU in another machine and the PC running or if you jump started the second PSU.

I recommend trying the PSU that is powering the machine you got the card working on. The only two variables really on the test machine are PSU and motherboard, so doing this will narrow down the problem. If the cared still doesn't work with the PSU that powers the test machine, then board incompatibility is more likely.

[dukeman]

Re: problem with hd4890 and output and GA-MS790GP-UD4h

i did jump start the other psu and just used the pci-e connectors. that pretty much eliminates the psu(also it is less then 3 months old).

i am falling on the mb being incompatible with the gpu. if i remember correctly i think sapphire uses a non-reference board for their cards. that may be the problem if it is true.

[artdrivers]

Re: problem with hd4890 and output and GA-MS790GP-UD4h

That motherboard has onboard graphics with sideport memory. Is it possible the sideport memory was'nt disabled when you initially installed the card? I am thinking this may cause a problem with the compatibility being the board has a hybrid crossfireX. You may need to contact Gigabyte to get this resolved.
• G.B.T. INC. - U.S.A.
TEL: +1-626-854-9338
FAX: +1-626-854-9339
Tech. Support:

http://rma.gigabyte-usa.com

Web address: http://www.gigabyte.us

[dukeman]

Re: problem with hd4890 and output and GA-MS790GP-UD4h

i have a rma for the vid card but i am going to double check if the sideport memory is disabled. i will also shoot a email to gigabyte to see if they have any ideals.

as i said the card works fine in another pc so the card is good.

[Psycho101]

Re: problem with hd4890 and output and GA-MS790GP-UD4h

As many many PSU's require minimum loads on the 3.3V and 5V rails to function correctly, I sstill beleive you need to test with that PSU again. I know it's a pain to take the PSU out (you only need to remove the donor PSU to get it close enough) but I've taken shortcuts before only to find that it was what I tested fore, but I didn't test well enough.

Side port is hardware disabled by AMD. Some have been calling for it to be enabled as a means of helping the 4890 compete with the GTX 285, but all the paperwork on sidepott suggests it won't help one bit. If the card were restricted for bandwidth it would, but with a 16x PCIe2.0 slot it has all the bandwidth it needs. Side port would not cause an issue like this.

[artdrivers]

Re: problem with hd4890 and output and GA-MS790GP-UD4h

OK you will want to try a power supply first then contact Gigabyte. Keep in mind Gigabyte may take a few days to reply.

[dukeman]

Re: problem with hd4890 and output and GA-MS790GP-UD4h

man that is alot of work to swap out supplies. much easier to rma the card. i do not have another supply that is strong enought to run my gaming pc.
i am between a rock and a very hard place. this sucks. i am not going to tear it apart and then find out it still will not work.

this is my psu

http://www.newegg.com/Product/Product.aspx?Item=N82E16817341018

runs the 8800gts without any problems so i doubt that is the problem.

[Psycho101]

Re: problem with hd4890 and output and GA-MS790GP-UD4h

I can swap a PSU in under 15 minutes, but I am used to doing it. You only have to remove the known working PSU/test PSU, the one currently in the machine with the 4890 can stay put. You don't need to touch anything in the PC being tested. Better to spend 15 minutes than a month waiting for an RMA, only to find you have the same problem still.

When you think about it, it's much more work to RMA the card and then test the PSU connected properly.

It may be that it still doesn't work, but it's definitely not time wasted. Always best to be 100% sure about things before you go to the trouble of an RMA. You can also then tell them even more about the problem with 100% certainty. This may accelerate the RMA process for you.

Edit! the PSU is a good brand and an OK model, but it's not just a question of power. Some PSU's and components have compatibility issues. As you say, it powers the 8800 fine, but the 4890 is a completely different card. If at the end of it, the card still doesn't work, then like I say, at least you'll know for sure. I've cut corners in the past with fault finding and been bitten in the ass by it. Never again for me.

[dukeman]

Re: problem with hd4890 and output and GA-MS790GP-UD4h

messed around with it for another 2 hrs tonight. different psu that worked great with 8800 but not the 4890.
it most definitaly is the mb. nothing else it could be. also did a cmos and used default but still no post.
i have spent well over 8 hrs trying to get this to work. enought of my time wasted. what really sucks is newegg is charging me $30 as restocking fee.
sucks to be me.
i guess i am going to save my money and get the next gen in several months.

[Lsdmeasap]

Re: problem with hd4890 and output and GA-MS790GP-UD4h

Did you raise South bridge voltage ever? Just checking, some cards need/benefit from this