Are the HD7990’s still good at something?

1 : Anonymous2021/08/25 05:17 ID: pb4mtb

Hey all, I happen to have 2 x HD7990's and wondering what to do with them. They seem quite old at this point. What are they still good at in 2021? It's not winter yet, so purely apartment heating doesn't seem Does BOINC/Folding@Home work with them still?

2 : Anonymous2021/08/25 07:29 ID: ha9lb1r

The HD 7900 series was incredibly good at double precision computing iirc. Like, really good. To give you an idea of how how insane they are, a Radeon 7970 GHz edition (only half as powerful as your 7990) is capable of around 1000 GFLOPS (or 1 TFLOP) of double precision floating point performance, while an Nvidia RTX 3090 can only do up to 556 GFLOPS, both according to Wikipedia. Granted, that's largely due to Nvidia (and modern AMD) artificially limiting performance in their consumer GPU's, but iirc they're still some of the best value GPU's even to this day at double precision performance.

But even outside of scientific simulations and stuff, it's still a somewhat capable 1080p card, especially for titles where you can get CrossFire to work properly.

ID: ha9lix2

Wow, thanks for the info. I should know more about these cards. Seems worth throwing at Folding@Home/BOINC then if they still work with them. I have the PSU wattage for it but worried about cooling them.

ID: ha9tr5y

Don't fry them wasting time and power on that crap, it gets nowhere, and yes I used to run 6 different PCs on BOINC at one stage. Keep them as they are highly collectible in future.

3 : Anonymous2021/08/25 06:00 ID: ha9eltg

Milkyway@Home would take advantage of Tahiti’s 1:2 rate Double Precision. They would be very good for that.

ID: ha9m6uz

Thanks for the info. I'm definitely up for that then. I have the PSU wattage but worried about cooling them with my current setup. I'll probably just set up one card for now. Another commenter said they had amazing compute capabilities, so seems like a great thing to throw at Milkyway@Home and other GPU projects.

4 : Anonymous2021/08/25 05:53 ID: ha9e40z

I was doing some gaming on a 7970 recently after picking one up dirt cheap, and it still does surprisingly well in a lot of modern games. Red Dead Redemption 2 runs at 35-45fps at 1080p on the first tick of the 'Balanced' preset, for example. Of course, only running one GPU on a 7990 is a bit of a waste and I don't think there's much in the way of Crossfire support for anything recent. Looking at Ebay they seem to be selling for $150+ still, so honestly I'd probably just sell them. There always seems to be a market for older dual-GPU cards, even if only as a novelty item.

5 : Anonymous2021/08/25 06:11 ID: ha9fjx5

7990's will go a LONG way... with next to no gpus to get, it blows away basically anything that does show up.

ID: ha9n2v0

There are a good number of 3000/6000 GPUs in stock(Australia), its just that of all the ones in stock they are stupidly overpriced and not worth the outlay.

That said I bought a MSI 3080ti Suprim X yesterday that found it self on sale .. for the same price I bought my 2080ti for nearly 3 years ago. Also snagged 64gb of 4000 CL15 memory too as it was also on sale, going to have a little fun overclocking when it shows up.

In the current climate of overpriced GPUs I think I was lucky to snag that deal, but it was still far more than MSRP.

ID: habpqax

oh sure i can get a 6700xt right now for basically $1300 and a 6800 for 1800 and 6800xt for 2200 and 6900xt for 3000-4000. 6600xts in around 700 by the time taxes are paid which is basically the lowest.

I'm just saying that when it comes to the current market, it's still far more practical still to utilize what's available, and a HD7000 series gpu or better that is still in the hands of the people looking to assemble a new machine will still be able to play most anything on these gpus reliably.

I not that long ago assembled a customer's system with a 5600x and al the nice bits and pieces to go with it, samsung 970 evo plus 1tb, 32gb of 2x16gb 3600mhz cl16 crucial ballistix, nice case with big fans and no noise, and, a HD7970 3GB graphics card that unfortunately didn't have UEFI support out of the box, but i snagged a UEFI compliant bios from techpowerup and presto, UEFI back on the menu and kicking along with everything properly setup in the bios for SAM and pure UEFI mode, zero legacy modes making certain that when the time arrives, they can drop any new graphics card in the system and they are off to the races.

In fact i "loaned" them the hd7970.. I've quite a few gpus currently loaned out in customer systems, ranging from HD5000/6000 gpus and up into the R9 390/390x, anything newer was a final sale situation with the promise of a exchange value when gpu prices drop sufficiently.

6 : Anonymous2021/08/25 05:43 ID: ha9d9bb

Play Rise of the Tomb Raider?

ID: haawby6

Yep, that game actually runs quite well on crossfire as it has a good implementation of DX12 multi-gpu.

ID: hac4u2u

I went from 3x 7970 to 1080ti a few years ago and at the time Tomb Raider was the only game that FPS actually went down on

7 : Anonymous2021/08/25 08:41 ID: ha9qc1u

They make good heaters.

8 : Anonymous2021/08/25 05:44 ID: ha9dc6f

HD 7990 is the same as the RX 280/280x AMD simply rebadged them, but since driver support has ended for the HD7000/RX280/380 series your mileage will vary when running newer games on them.

Light 1080p gaming shouldn't pose too much of an issue for it however just dont expect Ultra details or crazy frame rates, older games shouldn't have any issues running on them either.

ID: ha9i7ay

The 7990 was the dual die 7970. The 280x was the 7970, and the 280 was the 7950.

Not saying the 7990 gets a huge advantage for having two hunks of silicon, but just passing along the correct info!

ID: ha9msjp

Thanks for that, I wasn't 100% sure how they rebadged them exactly, I just remember all teh fuss about it at the time AMD decided to do that.

ID: ha9ic0v

The 7990 is two 7970s on one PCB. So like a two way crossfire 280X.

ID: ha9xne3

7990 was the dual die one.

Also the 7970 had a 6gb model that was really great

ID: haa7yds

I'd love to see a 3GB vs 6GB comparison in modern 2021 games. If the 6GB model is still in line with the 3GB then maybe VRAM "future proofing" isn't worth it. I've seen comparisons between the 2GB and 4GB GTX 680 and performance was shockingly similar.

ID: haa2jjb

Nods, a fellow redditor pointed that out, I have a 6990 sitting in storage so I should have spotted it.

makes me want to go on Ebay and see if I can buy a 6gb one for my retro rig ..Im curious if X-fire is still working for modern games and how much impact it has on FPS with such an old card.

I cant remember if the card runs X-Fire internally and windows doesnt need to load X-Fire for games.

9 : Anonymous2021/08/25 07:31 ID: ha9lgk7

Excellent space heaters.

ID: ha9m2jf

I'll definitely consider it when winter comes around hah.

10 : Anonymous2021/08/25 11:50 ID: haa4yeh

Hang them on a wall and frame them.

11 : Anonymous2021/08/25 12:37 ID: haa9yee

Even without Crossfire support it can still do 1080p gaming with moderate settings/FPS.

If it still works, and even if you already have a working GPU, I'd keep it under your hat in case you ever need a backup GPU.

12 : Anonymous2021/08/25 12:31 ID: haa98g6

Playing esports games like league, overwatch etc. In 1080p 60.

13 : Anonymous2021/08/25 13:34 ID: haagy8o

i was considering this card when the 980ti and fury x came out. Ultimately i went with a 980ti even though the 7990 was way cheaper but coming from a 6850 crossfire setup and dealing with the issues made me not choose it.

14 : Anonymous2021/08/25 13:15 ID: haaeiqm

You can mine vertcoin profitably. Check out

15 : Anonymous2021/08/25 08:08 ID: ha9o3bk

Yes, they are indeed very good.

16 : Anonymous2021/08/25 05:18 ID: ha9b3of

If they work then you can plug in more monitors. Other than that and very light gaming. Not worth much

ID: ha9mlrg

Trying to think about if it's worth it since I have a GTX 1050 Ti as my main GPU, pretty much only new GPU I have. I managed to get these two cards for basically nothing a while ago and seems kind of a shame to let them sit around. I almost forgot I had them until I was cleaning out my room. Dual GPU cards always seemed so interesting. Maybe it's worth just playing around with Crossfire on supported titles for the heck of it.

ID: ha9ya5n

Even a regular 7970 would be faster than a 1050ti, it just draws a lot more power and has less driver support and less memory since it splits the 6GB between gpus.

ID: habymml

Keep the 1050 ti and sell the 7990. Crossfire isn't worth it. I tried crossfire with some 380s and it was a terrible experience. Even games that used to support crossfire in previous years, didn't anymore.

Plus when crossfire was enabled, you also lose access to other features like anti-lag, sharpening, integer scaling, etc.

Finally, you can't globally disable crossfire and only enable it on a per game basis. Have to enable it globally, and disable it everywhere except the 3 games where it works. You will see issues in some programs because you forgot to disable crossfire for them.

17 : Anonymous2021/08/25 21:37 ID: hacgdvy

Gaming. AMD graphics cards from that first generation of GCN are still pretty useful. They still hold their own especially in any game that can use Vulkan. I have an old Radeon 250 (a little shy of a R7750) running a handful of CEMU games and other emulators so my niece and nephew can have a blast playing couch coop games and lighweight indie titles / older games. Your 7990 is probably a little power hungry and a bit loud for this kind of thing but you can easily underclock it and still get a fully playable experience in a lot of games.

18 : Anonymous2021/08/25 23:54 ID: hacyv3z

You know what, I'm GPU-less at this moment and want something to run old games. Had a 7870 Crossfire back in the day, so I'll check out on ebay.

19 : Anonymous2021/08/25 10:28 ID: ha9xxaf

If You have at least 4GB version of this card use Nbminer and try to mine some RVN.

ID: habh3xr

Sadly it's 3gb per GPU. I think they draw so much power that it wouldn't be worth it regardless.


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