Funny thing is I've also found fans on the gainward M64s. Will never understand that one.

I would not flash it with a random TNT2 Ultra BIOS, I would simply try to retrieve your card's current BIOS, modify the clock speeds (a TNT2 Ultra has core clock of 150 MHz and a memory clock of 183 MHz), and reflash the card with the modified BIOS.
However, before doing any of that, it's important to do some manual overclocking tests, to see if your card can actually handle those frequencies. After you're sure that it does, you can make the changes permanent.

TnT2 Ultras have faster memory ICs than the normal TnT2 cards, other than that they are pretty much the same.

So if your normal TnT2 has the same Ics as an Ultra then its possible that it would work ok with the Ultra BIOS, I guess it depends on if the core can also handle the faster speed.

I have a Gigabyte GA-660 plus TNT2 Pro that runs 176mhz on both core and memory. The memory is 6ns so is factory overclocked at 176mhz.

Googling a bit gives some interesting information. There was a TNT2-A version of the GPU, made on a 22nm process, this card has that.
https://www-ixbt-com.translate.goog/video/ga- … en&_x_tr_pto=sc

All depends on what memory it is equipped with, quality\bin of main chip etc etc!

I always start with the nvidia coolbits reg tweak, and work out what clocks the card can run before attempting any flashing!

Imperious wrote on 2025-05-01, 12:50:

I have a Gigabyte GA-660 plus TNT2 Pro that runs 176mhz on both core and memory. The memory is 6ns so is factory overclocked at 176mhz.

Googling a bit gives some interesting information. There was a TNT2-A version of the GPU, made on a 22nm process, this card has that.
https://www-ixbt-com.translate.goog/video/ga- … en&_x_tr_pto=sc

That's a 0.22 micron process, so 220 nm not 22. We'd get there about 20 years later though.

bloodem wrote on 2025-05-01, 11:56:

I would not flash it with a random TNT2 Ultra BIOS, I would simply try to retrieve your card's current BIOS, modify the clock speeds (a TNT2 Ultra has core clock of 150 MHz and a memory clock of 183 MHz), and reflash the card with the modified BIOS.
However, before doing any of that, it's important to do some manual overclocking tests, to see if your card can actually handle those frequencies. After you're sure that it does, you can make the changes permanent.

That's more what I was thinking. I don't think a TNT2 Ultra bios would work solely on it not being an actual TNT2 Ultra chip. I'll see how it handles overclocking and go from there. Thanks!

Trashbytes wrote on 2025-05-01, 11:57:

TnT2 Ultras have faster memory ICs than the normal TnT2 cards, other than that they are pretty much the same.

So if your normal TnT2 has the same Ics as an Ultra then its possible that it would work ok with the Ultra BIOS, I guess it depends on if the core can also handle the faster speed.

Oh wow you're right, they do have different memory. I was running under the assumption that the TNT2 Ultra was basically a TNT2 chip made specifically for cards that could handle cooling better. Crazy I didn't even consider RAM as a potential setback. So it seems the SGRAM on mine are max clocked at 143MHz, whereas the Ultra versions are max clocked at 183MHz.

altarofmelektaus wrote on 2025-05-10, 11:20:

Trashbytes wrote on 2025-05-01, 11:57:

TnT2 Ultras have faster memory ICs than the normal TnT2 cards, other than that they are pretty much the same.

So if your normal TnT2 has the same Ics as an Ultra then its possible that it would work ok with the Ultra BIOS, I guess it depends on if the core can also handle the faster speed.

Oh wow you're right, they do have different memory. I was running under the assumption that the TNT2 Ultra was basically a TNT2 chip made specifically for cards that could handle cooling better. Crazy I didn't even consider RAM as a potential setback. So it seems the SGRAM on mine are max clocked at 143MHz, whereas the Ultra versions are max clocked at 183MHz.

The Ultra has a higher binned TnT2 die but it also has the faster memory ICs too, if you have one of the nicer normal TnT2 cards you can get lucky and have memory that will clock to TnT2 Ultra speeds. It really depends on the manufacturer, Gigabyte and ASUS were known for doing this if they had an oversupply of faster memory ICs.

Crazy how certain late TNT2 Pro cards can apparently do 183/200 with little more than a fan.

I know that ASUS just slapped 5ns SGRAM on some V3800 TNT2 Pro cards, effectively making it TNT2 Ultra+. TNT2 Ultra usually had 5.5ns memory.

The Serpent Rider wrote on Yesterday, 10:45:

I know that ASUS just slapped 5ns SGRAM on some V3800 TNT2 Pro cards, effectively making it TNT2 Ultra+. TNT2 Ultra usually had 5.5ns memory.

Asus did the same with some of the late GeForce 2 MX400 models.
I have one that looks very cheap and undesirable at first glance, it has a 64bit memory interface, however... there is a catch: it comes with 4ns DDR memory, which can go as high as 270 MHz (540 MHz effective speed), for an insane 4.3 GB/s throughput (just 1 GB/s shy of a GeForce 2 GTS).

altarofmelektaus wrote on 2025-05-01, 11:51:

Funny thing is I've also found fans on the gainward M64s. Will never understand that one.

I think the TNT2 must have been found to have issues without a fan during the production run. Imho it runs quite hot, and my guess is that this is why the ramdac on many of them has failed, since they don't typically seem to have other problems then that. It always seems to be later cards with the fan.