View Full Version : Bios mod for 5800NU
Is there a bios mod for the 5800NU to say the 5800U? I looked on mavke's site and didnt see one. I know its a rare card, but if someone has a 5800U I would appreciate the bios :) My card easily does U speeds, but would probably gain a bit from increased Volts.
OK, I found the 5800U bios. Does anyone know aside from speeds what difference there is in this and the NU bios?
quik_2_win
11-27-04, 02:55 PM
Likely none- except for clock speeds and core voltage. What voltage does your 5800NU run at now? You said it will run 500/ 1000 with the original BIOS? I'm thinkig by flashing the BIOS you'd like to overclock it further, and if so, remember that these cards run quite warm so good cooling is essntial. You are also aware of the "clock-throttling" issue that these cards have with the 60-series Detonators, right?
No, if you could fill me in I'd appreciate it. I am using the 52.16 drivers right now. I am stable at 515/1120 24/7, any higher and I get diminishing returns. That seems to be the peak for me.
quik_2_win
11-27-04, 10:27 PM
Do you mean that anything above 515/ 1120 seems to be pointless as in no gains are evident? Or do you get artifacts/ freezes/ general instability? What temperature does your card run at at these clocks? The "clock throttling" issue may be a factor in the older 50-series Detonators also, but I cannot verify. Basically what this means is that the drivers will clock the card down under certain conditions, eg. running warm. It became a real problem in the 60-series drivers as the card would downclock while running 3D apps. fairly consistantly- even casual gaming. The "fix" is to install Rivatuner, and allow overclocking of the "low power 3D" mode. Simply set this mode to the same value as the "regular" 3D mode and that will prevent the throttling...
Also, which type of cooler is on your card? If you have the "ultra" cooler (some NU5800s did) you should not have many problems with cooling- if you have the smaller cooler then temperature may become a factor over 500Mhz as that cooler was intended for only 400Mhz...
Is there a bios mod for the 5800NU to say the 5800U? I looked on mavke's site and didnt see one. I know its a rare card, but if someone has a 5800U I would appreciate the bios :) My card easily does U speeds, but would probably gain a bit from increased Volts.
The main problem with flashing a 5800nu to a 5800u would likely be a clash with memory types. Doesn't a 5800u use DDR3, and not sure what your 5800nu has ???
However, you could probably get more Core speed from your card by modding your bios to set GPU volts at 1.5, instead of its norm of 1.4v !
All you should have to do is use X-Bios editor and look for gpu volts look-up table binary string of "78 04 82 05 8C 06" and change it to "78 04 82 05 96 07".
Or of course, you could just use NiBiTor 1.8 and at "VID Mode" tab, set Voltage 3 to VID 7 !
However, remember whatever you do will likely increase temps. And good temp control was never a plus point with a 5800 card ??
Lfctony
12-01-04, 06:57 PM
Both cards use DDR-2.
Both cards use DDR-2.
For some reason, I had a vague feeling that 5800nu and 5800u cards used diff memory types.
However if they both use same memory type, then nothing to stop flashing a 5800nu with a 5800u bios -----> apart from ensuring the card has adequate heatsinking/cooling to cope with increased temps?
EDIT:
Just compared a 5800 bios with a 5800u bios and found speed tables to be same, 2D is 300/600, Throttling is 400/800, and 3D is at 500/1000.
So maybe temps wont be an issue unless for overclocking ?
Reliant
12-02-04, 01:23 PM
For some reason, I had a vague feeling that 5800nu and 5800u cards used diff memory types.
However if they both use same memory type, then nothing to stop flashing a 5800nu with a 5800u bios -----> apart from ensuring the card has adequate heatsinking/cooling to cope with increased temps?
EDIT:
Just compared a 5800 bios with a 5800u bios and found speed tables to be same, 2D is 300/600, Throttling is 400/800, and 3D is at 500/1000.
So maybe temps wont be an issue unless for overclocking ?You are correct. The 5800 uses DDR clocked at 400mhz(800mhz effective) and the 5800U uses DDRII clocked at 500mhz(1ghz effective). Isn't DDR faster if clocked to the same speed as DDRII?
You are correct. The 5800 uses DDR clocked at 400mhz(800mhz effective) and the 5800U uses DDRII clocked at 500mhz(1ghz effective). Isn't DDR faster if clocked to the same speed as DDRII?
Glad to know some of my brain cells are still working !
As I said, there was this vague feeling in the back of my mind that a 5800 used diff memory from a 5800u ------> which then obviously means you must not flash a 5800 with a 5800U bios !!!!!!
Also, I think DDR2 was supposed to be more overclockable and do more work per clock cycle, but don't believe it was found sufficiently successfull over DDR in vga cards to guarantee a future.
And although it is now becoming the in thing for new generation mobo main RAM, it is still proving less effective than DDR untill running at higher speeds, simply because the DDR2 ram chips have a higher built-in latency.
I really don't think 5800NU uses DDR1, I'd like to see a link supporting that claim.
DDR-2 has higher latencies... My 5700 had something like 21 25 14 7 8 in the bios.
If I try to lower them to typical DDR-1 it cannot even run at nominal frequency (450MHz for the 2.2nS modules used).
Besides I don't know if there are other unknown parameters in the BIOS to be taken into consideration. I suggest to try Omni Extreme Edit to modify the frequency in your card bios instead of using a bios designed for a different model
I really don't think 5800NU uses DDR1, I'd like to see a link supporting that claim.
Just checked the ASUS website, and their 5800 certainly uses DDR on 5800 and DDR2 on 5800U !
http://www.asus.com/prog/spec.asp?m=V9900&langs=01
http://www.asus.com/prog/spec.asp?m=V9900%20Ultra&langs=01
But if you also just search the net for FX5800 cards, it seems that some manufacturers use DDR2 for both 5800 and 5800u cards.
So depending on manufacturer, it appears that there can be either DDR or DDR2 on a 5800nu card ?
ricercar
12-03-04, 01:46 PM
My ASUS non-U has DDR2, and says so on the box, regardless of the ASUS website claim.
My AOpen 5800 non-U has DDR2.
My two PNY 5800U have DDR2.
The NVIDIA NV30 reference design specifies DDR2 for 5800, 5800U, FX1000, FX2000.
It's too bad you can't hook those suckers up in quad SLI mode!! ;) It'd be really fast I bet, but probably sound like 747 just went over your house. lol
My ASUS non-U has DDR2, and says so on the box, regardless of the ASUS website claim.
My AOpen 5800 non-U has DDR2.
My two PNY 5800U have DDR2.
The NVIDIA NV30 reference design specifies DDR2 for 5800, 5800U, FX1000, FX2000.
So are we now saying that even although manufacturers like ASUS, MSI and XFX advertise 5800 cards with DDR memory, they never actually made any and are therfore lying; or being economical with the truth as some might put it ??
UPDATE:
To add to the question of there being actual 5800nu cards with DDR memory; here is firingsquad product info on a XFX 5800,
http://www.firingsquad.com/products/hwproduct.asp/889
The XFX data clearly states that 5800 uses DDR and 5800u uses DDR2 ??
Mechanic
12-04-04, 02:25 AM
Well, my MSI FX5800 uses DDRII mem http://www.msi.com.tw/program/products/vga/vga/pro_vga_detail.php?UID=423&MODEL=
Are you saying I can be running 500/1000???
ricercar
12-04-04, 06:04 AM
I defy you to find a NV30 card—5800, 5800 Ultra, 1000 or 2000—that does not have Samsung DDRII. They do not exist.
My guess is that someone made a mistake in the NV30 marketing collateral and regular DDR was propagated throughout the OEM marketspace. NV30 DDR exists only on paper, not in hardware.
Well, my MSI FX5800 uses DDRII mem http://www.msi.com.tw/program/products/vga/vga/pro_vga_detail.php?UID=423&MODEL=
Are you saying I can be running 500/1000???
You can overclock and run at 500/1000, if your cards heatsinking can keep the gpu and memory chips sufficiently cool at those speeds ?
Mine runs all day at 525/1120, although the turbines will wind up to full jet speed after about 20 min of straight gaming.
I defy you to find a NV30 card—5800, 5800 Ultra, 1000 or 2000—that does not have Samsung DDRII. They do not exist.
My guess is that someone made a mistake in the NV30 marketing collateral and regular DDR was propagated throughout the OEM marketspace. NV30 DDR exists only on paper, not in hardware.
No point in defying anybody to go and find a 5800 card with DDR memory, since most sensible people wouldn't want one -----> I know I certainly wouldn't.
With all the powerfull vga cards available today, why would anybody think a 5800 was a current worthwhile purchase ------> unless of course it was maybe found on ebay at a bargain rock bottom price ?
Maybe we will never know, or maybe someone will eventually be identified as having one, maybe only an initial production version, or early development model ----> who knows, only time will tell.
Also, even if you are right that 5800 data at the diff manufacturer and distributer websites is completely wrong simply because of some long past bungled PR/Marketing exercise; it just means that untill someone finds some supporting evidence to prove it, then it is just another open ended theory ?
Flipper
12-04-04, 04:59 PM
Every single 5800 uses ddr2 because every single 5800 were manufactured by nvidia themshelves.
If in some sites you see ddr, it's a typing mistake, all 5800 on the planet are using Samsung ddr2.
ricercar
12-04-04, 05:17 PM
NVIDIA made all the NV30 12-layer PCBs and soldered the GPU and other parts on. However, the fan on non-Ultras differed from the black reference fan + separate RAMsinks for some OEMs, notably Abit. To my knowledge all OEMs used the copper reference fan+RAMsink for 5800 Ultras.
quik_2_win
12-04-04, 07:31 PM
So do we all agree at least on the recommendation that he not flash his BIOS? Personally, I think there would be no point. As has been stated, he could modify the core voltage if he desires. Even with that, I doubt his 5800NU is going to clock much higher than he has been able to push it already. I believe that the 5800 GPUs were meticulously speed-graded with the most stout ending-up on the "Ultra" boards (of which there are/ were very, very few). If I recall, BFG had to cancel the Ultra "pre-order" because nVidia ran out of GPUs that were graded for Ultra boards. Not that most NU boards can't run at 500/ 1000, it's just likely not going to clock much higher than that, particularly if he has the single-slot cooler-
can't wait til my 5800 gets here...phooey to all the haters.
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