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The RX 7900 GRE as of 20/03/2024 - Not such a flawed product?

pastymuncher said:
Who has one of these then? What is the undervolting like on them and how many watts have you shaved off the power draw. I don't like the power draw on these cards but you can't ignore the performance for the price, almost 4070ti performance for a similar price to a 4070 non super. I was looking at a 4070 super as my 3070 is almost using all of it's vram (7892mb) while playing ETS2 with mods and I am getting texture popping but it only has a extra 4Gb of vram over my 3070 and like I said the price to performance of the 7900 GRE cannot be ignored. The downside is losing DLSS.
Click to expand...

Just undervolting alone doesn't reduce the power draw, the card has a set power and voltage limit ceiling that it will always try to achieve with clocks, so in one game you might get 2400 Mhz at 100% load, in another you might only get 2200 Mhz, depending on how much power the card need to draw at a given clock rate per game specific.
If you undervolt the card it will simply use the reduced power draw from the lower volts to boost the clocks higher until it reaches that set power draw ceiling.
The way you reduce the power draw on these is to use the power draw slider in the drivers, you simply put that in to the negative % range, so what you can do is set lower volts by 10% and then set -10% power draw, that was you get the same performance with 10% less power draw.

Power draw is different to how i experienced it at least on my 2070S, it has a stated TDP of 220 watts and out of the box that's what it used.
The 7800 XT has a stated board power of 260 Watts, stock i have never seen it push much past 230 watts, even very overclocked with +15% power the highest i have seen it peak at is 285 watts and usually runs at around 250 watts, +15% power should be 300 watts.

I think this is because at the given volts the card cannot actually clock high enough to max out the power draw limit.
I don't know how this works on Nvidia 3000 and 4000 GPU's but i find it a very complex yet easy to understand and interesting system.
 
ANDARIAL said:
Price of these is tempting
I currently have a 6700XT and recently got a 4K monitor.It plays but with lowered settings.Would the GRE handle 4K? or should i wait/get the 7900XT? :)
Click to expand...

You cut your frame rates in half going from 1440P to 4K and the 7900 GRE is 72% faster than the 6700 XT, so if you want the same FPS at 4K that you got with the 6700 XT at 1440P you would be looking at the 7900 XT which is 105% faster.

From a personal 7800 XT perspective, i don't think it is a AAA game 4K card, its a very fast AAA game 1440P card.
 
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Is playable for me even at 120hz,much smoother than on my 2560x1600 60hz old monitor
But i had to drop the eye candy
frames are around 80-120.i manage but want something more :D
I dont play many AAA games i think Destiny and halo with a bit of serious sam are about the `best` i play
 
humbug said:
Just undervolting alone doesn't reduce the power draw, the card has a set power and voltage limit ceiling that it will always try to achieve with clocks, so in one game you might get 2400 Mhz at 100% load, in another you might only get 2200 Mhz, depending on how much power the card need to draw at a given clock rate per game specific.
If you undervolt the card it will simply use the reduced power draw from the lower volts to boost the clocks higher until it reaches that set power draw ceiling.
The way you reduce the power draw on these is to use the power draw slider in the drivers, you simply put that in to the negative % range, so what you can do is set lower volts by 10% and then set -10% power draw, that was you get the same performance with 10% less power draw.
Click to expand...
This is what I found. Stock settings Alan wake 60fps. Set MV to 940 and get 67fps. Clocks go from 2370-2730.
 
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pastymuncher said:
Who has one of these then? What is the undervolting like on them and how many watts have you shaved off the power draw. I don't like the power draw on these cards but you can't ignore the performance for the price, almost 4070ti performance for a similar price to a 4070 non super. I was looking at a 4070 super as my 3070 is almost using all of it's vram (7892mb) while playing ETS2 with mods and I am getting texture popping but it only has a extra 4Gb of vram over my 3070 and like I said the price to performance of the 7900 GRE cannot be ignored. The downside is losing DLSS.
Click to expand...
Only had a little play with mine. Undervolted to 10.30 MV (out of the box was 10.50) and set pwr limit to 15 other than that I have left it until the supposed driver fix arrives unlocking memory etc. To be honest I don't have a need to really do much with it and it's far faster than my 6800, much faster than the reviews seem to show. Really pleased with it and will certainly do me until RDNA 5 or Nvidia in a few years. Will be upgrading CPU etc to zen 5 before I upgrade again.
 
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speeduk said:
Did an hour of alan wake 2 last night and this morning and some cyberpunk no probs. It crashes at 930mv.
Click to expand...

Ok, i can benchmark Unigine and 3DMark at those volts, no problem.

But gaming..... actually coming to think of it its only Star Citizen that crashes at below 1050 Mv and it was just as picky with overclocking the 2070S, i might try 950 Mv for a couple of hours of Helldvers 2 when i get back home, see how it goes.
 
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humbug said:
Just undervolting alone doesn't reduce the power draw, the card has a set power and voltage limit ceiling that it will always try to achieve with clocks, so in one game you might get 2400 Mhz at 100% load, in another you might only get 2200 Mhz, depending on how much power the card need to draw at a given clock rate per game specific.
If you undervolt the card it will simply use the reduced power draw from the lower volts to boost the clocks higher until it reaches that set power draw ceiling.
The way you reduce the power draw on these is to use the power draw slider in the drivers, you simply put that in to the negative % range, so what you can do is set lower volts by 10% and then set -10% power draw, that was you get the same performance with 10% less power draw.

Power draw is different to how i experienced it at least on my 2070S, it has a stated TDP of 220 watts and out of the box that's what it used.
The 7800 XT has a stated board power of 260 Watts, stock i have never seen it push much past 230 watts, even very overclocked with +15% power the highest i have seen it peak at is 285 watts and usually runs at around 250 watts, +15% power should be 300 watts.

I think this is because at the given volts the card cannot actually clock high enough to max out the power draw limit.
I don't know how this works on Nvidia 3000 and 4000 GPU's but i find it a very complex yet easy to understand and interesting system.
Click to expand...

Many thanks for that insight. It seems a little more complicated than my 3070 but like anything new it's different and I would just need to learn how. My 3070 is pulling way more than it's TDP and even with a hefty undervolt is still drawing 245w by itself playing a modded ETS2 at 1440p. The reviews I have read put the 7900GRE at 260-300w depending if it's a stock or overclocked card. That's not a million miles away from my 3070 power draw and the 16Gb of memory will be good for some time at 1440p so it looks like I will be looking around for the best price/performance version of these cards and placing a order on Monday. This will be my first AMD card for a long time, the original 6900/6950 that could be flashed to a XTX being the last one. At least it uses proper problem free power plugs!!
 
My last AMD card was a 5700 XT, that had a really bad cooler, ASRock Challenger D, i went back to Nvidia with the 2070S.

Recent history:

GTX 970
GTX 1070, MSI Gaming X, good card.
RX 5700 XT for a few weeks
RTX 2070S, had that for 3 years, MSI Gaming X, good card....

Sapphire Pulse RX 7800 XT, i really like the card and the GPU, all good....
 
pastymuncher said:
Many thanks for that insight. It seems a little more complicated than my 3070 but like anything new it's different and I would just need to learn how. My 3070 is pulling way more than it's TDP and even with a hefty undervolt is still drawing 245w by itself playing a modded ETS2 at 1440p. The reviews I have read put the 7900GRE at 260-300w depending if it's a stock or overclocked card. That's not a million miles away from my 3070 power draw and the 16Gb of memory will be good for some time at 1440p so it looks like I will be looking around for the best price/performance version of these cards and placing a order on Monday. This will be my first AMD card for a long time, the original 6900/6950 that could be flashed to a XTX being the last one. At least it uses proper problem free power plugs!!
Click to expand...
Last Nvidia card I had was a gtx970 (loved it despite the memory fiasco) however last three have been AMD and the driver software has come such a long way since even my Vega 56. Really is decent now and I have no complaints with either my previous RDNA2 6800 and my new 7900GRE. In fact one of the reasons I jumped on the 7900GRE is that I didn't want to change software to nvidia as had been so happy with the the adrenalin package.
 
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I have just ordered the Asrock 7900GRE Steel Legend from here. £530 for that kind of performance is a steal at todays prices and double the memory of my 3070 is going to be great. For the first time ever free delivery actually worked!! We don't usually get it up here on large items as DPD seems to think that anywhere north of Dundee isn't part of the UK mainland, god help us if the lunatics ever win a independance vote!!
 
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