Best Sapphire Toxic RX 6900XT Review 2021

Radeon RX 6900XT

Today we have an enjoyable review. We are checking out Sapphire Toxic RX 6900 XT edition, So as far as I can work out, the last time Sapphire released a Toxic card was all the way back in 2015, so it's been an almost five year wait, but with the RX 6900XT this is no ordinary Sapphire Toxic card as. Instead, it uses a 360 millimetre when one liquid cooler to cool the GPU, 

and that is definitely needed as powerful this card can have up to 400 watts. On top of that, we have all the expected features, including two files where you can choose between a performance and quiet mode. There's also a hefty factory overclock and plenty of RGB lighting.

Design Overview - Sapphire Toxic RX 6900 XT


Starting off with a look at the design of the card, then I would say it's quite hard to miss the fact that there is a 360 millimetre all in 1 liquid cooler used as part of the Sapphire Toxic RX 6900 XT. Sapphire is using a hybrid approach for this, though, so the AIO is cooling only the GPU dying, and then we have an integrated heatsink with two heat pipes for the VRM and memory.

I'm also uses an active 12 blade 10-millimetre fan as for the shroud of this card, and this uses a combination of aluminum and plastic in a sort of greyish silver color. It does feel very solid in the hand. The 100 millimetres fan are covered by a series of vents that are definitely quite eye-catching on that large mirror finish section. The middle of this shroud is actually 1 of 4 RGB zones on the Sapphire Toxic RX 6900 XT.

The others include an RX logo on the backplates, the Sapphire logo on the side of the card, and even a 100-millimetre fan is RGB. The lighting itself is all controlled via the trick software, but there is also an RGB header at the end of the card or if you want to control the lighting via an external device such as your motherboard.

We can also note the dimensions of this card as it measures the 268.77 by 130.75 by 44.07 millimeters take on its own it is actually a pretty compact graphics card by modern standards. Still, then you need to factor in the 470-millimetre length AIO tubes as well as 360 millimeter radiators, so as always, you will need to check this is going to fit in your case.

Flipping the card over now, We can see a full-length metal backplate again in the same soft silverish grey color as the shroud. The Sapphire Toxic RX 6900 XT logo here is 1 of those RGB zones that we've already mentioned, and we can also note a cut out behind the GPU core.

Another key feature to point out is the bio switch which is positioned towards the front of the IO bracket.  By default, because it's using the performance bios, when you also toggle this over to the quiet bios, there's even a third toggle on the bios, but this is simply to let you choose which bios mode you want to use using the tricks software.


Moving on, we can also see the display outputs are standard with three display port and 1 HDMI 2.1 power connector through compared to reference how had a little boost as an extra six-pin, so you need to 8 pins and 1:06 pin, Looking now at the all in one liquid cooler this is an AC tech branded unit. It measures in at 394 by 120 by 52.48 millimetres, and that is including those fans.

The sleeve tubing measures 470 millimeters long and Sapphire Toxic RX 6900 XT is using 3 first duo 120 millimeter fans these duo also support RGB lighting which is controlled by the GPU. Out of the box the 3 fans on installed to the underside all the tube size over the radiator and that is a single sleeve cable which contains the 3 fan cables which runs alongside 1 of the AIO tubes which keeps things nice and tidy.

Radiator Installation - Sapphire Toxic RX 6900 XT


This fan placement definitely implies that RX 6900 XT intended the radiator to be installed in the roof with the three fans acting as exhausts. However, depending on your setup, this may or may not work for you in my case, I've already got a 280 millimeter radiated in the roof so that I would have rather installed the radiator at the front with the fans acting as intakes, thankfully yes, 

You can do this you just need to unscrew the three fans and flip them over the only slight hiccup is that the cables from the fans themselves do get a little more untidy as a result by default all the fan cables run along with the frames of the fans themselves they are neatly channelled that way. Still, you can't use those little channels if you flip the fans over.

For me, this isn't really a problem until I did get the radiator in the front of my case with the three fans acting as intakes it's just something to be aware of though that AMD Rx 6900 XT has made life more comfortable if you want to install the radiator in the roof of your case. It's at this part of the review then I would usually come to disassembly, and we take a look at the PCB and the cooling solution.


AMD Rx 6900 XT also ask us for this full articles to not disassemble the AMD Rx 6900 XT. Frankly, I think that's just because the on very many units of these in the world, and they don't want us to potentially damage something when we take off the liquid cooler on the shroud etc. so AMD Rx 6900 XT did provide us with a few images of the PCB and the cooling solution which will go ahead.

PCB and Color Photos


First up, we can see that's a total of 18 phases is making up the VRM, of which Sapphire Toxic RX 6900 XT 5 claims 14 phases are for the GPU power delivery unless 2 phases for the memory and 2 for the SOC. We can also see from another photo that is Sapphire is using the Infineon XDPE 132 G5D controller for the GPU VRM.


Then there's also an international rectifier IR35217 which is used for the memory as for the cooling as we all know, one only contacts with the GPU dying. Sapphire Toxic RX 6900 XT is utilizing a die-cast heatsink with two heat pipes which are used to cool the memory and the VRM, and obviously, there is airflow from 100 millimeter fan, which is on the card itself.

Performance - Sapphire Toxic RX 6900 XT


So then it's time to move on to performance. As I alluded to, we did install this in a chassis, and it's all a regular GPU test system provided to us by a PC specialist. This is based around Intel's i9 10900K, which is overclocked to 5.1 gigahertz on all cores that CPU is paired with the Asus ROG maximum 12 hero motherboard, and we also have 32 gigabytes of corsair vengeance DDR4 memory clocks at 3600 megahertz.

However, Sapphire  doesn't usually have a feature called Sapphire boost, and this is essentially a one-click overclock designed to give you the absolute maximum performance that you can get from the Sapphire Toxic RX 6900 XT, enabling this is literally a one-click overclock within the trick software I'm not boosting the way too deep you cook clean up to 2660 megahertz I know also increase the power limit to 400 watts.

So naturally, I did test this model as well, ticking off all testing with power draw. Then here we can see a small difference between the quiet performance bios. The quiet bios hit 342 walks during our testing well the performance bios drew 10 watts more.

Clock Speed Behavior


So both of those modes more power-hungry than the reference Sapphire Toxic RX 6900 XT. I'm also a gigabytes gaming OC model, which we reviewed a couple of weeks ago. Asphalt Sapphire Toxic RX 6900 XT boost but one-click overclock we mentioned well this pushes power draw to another level hitting 404 walks on average, and that's an increase of over 100 watts compared to the reference card.

The reason for this rather extreme power draw is that the Sapphire boost pushes the GPU frequency to some serious levels. It does bounce around a little bit more than the performance bios, as you can see from this chart, but it is clearly faster.

The average numbers all AMD Sapphire Toxic RX 6900 XT boost run at 2579 megahertz I'm not compared to 2429 megahertz for the performance bios, and then 2401 megahertz for be quiet bios clearly Sapphire Toxic RX 6900 XT boost is insanely false. Still, actually, even the quite bios are running 100 megahertz faster than the gigabyte gaming OC OC bios.

Thermal Performance


Next up is thermals, and it's hardly a surprise hate to see the  Sapphire offering sub-70-degree operating temperatures regardless of the bios used. I think we really would expect that from a 360 millimeter all in 1 liquid cooler diving deeper, the performance bios gives the lowest temperatures as a result of its increase fan speed while the quiet bios are the hottest running option as it significantly decreases fan speed but even then it didn't exceed 64 degrees.

RX 6900XT does run hotter than the performance last as a result of its increasing power limit and also the fact it's clock speeds are significantly higher; Thermals only tells part of the story though as now we come to noise levels, there's no doubt about it the quiet bios is impressively quiet hitting just 38 DBA well it's fan spun at 900 RPM.


The performance mode is significantly louder. However, as the fines been up to 1290 RPM, Sapphire boost meanwhile takes that a step further and pushes fan speed to 1410 RPM, which hit 46 DBA according to a sound meter. Both performance and RX 6900 xt release date boost modes are definitely quite audible I'm I would say Sapphire  boost does make the fans overall pretty loud. We can't get around that, though. By testing noise normalized stumbles at 40 DBA due to the different power targets, we don't actually get identical results from the RX 6900 xt release date.

The quiet ones has the lowest power target and then fall off with the lowest temperatures even RX 6900 xt release date booster with this 400-watt target hit a junction temperature of just 75 degrees which is 12 degrees cooler than the reference RX 6900 XT. Of-course we would expect those temperatures to be low considering the Sapphire uses a 360 millimeter liquid cooler, but there is still good to see that this AIO is more than a match for the GPU and its 400-watt mode.

Game Testing - Sapphire Toxic RX 6900 XT


I tested all 14 games from our regional Sapphire review so few of review are mention on this below so we can get a good idea of how much faster the Sapphire Toxic is compared to the reference design and also how it stacks up to the RTX 3090.

I'm going to be focusing on a few select titles 4K, and then we'll go over the overall performance summary at the end, kicking off with borderlands 3. This is an AMD be sponsor title which uses unreal engine 4. This is actually 1 of the best-case scenarios for the Sapphire as it outperforms the reference 6900 XT by 10 percent at 4k.

Compare Performance With Other Model 

  • That is enough of a boost to give the Sapphire Toxic RX 6900 XT 8% advantage over the RTX 3090, which isn't bad at all. Next up, we come to control a game which definitely favours Nvidia hardware here, the Toxic managed to outperform the reference Sapphire 6900 xt by 8 percent at 4K, but it still comes in 12 percent slower than the RTX 3090. It has closed the gap on the Nvidia card significantly lower as the reference 6900xt is 8 percent slower than the RTX 3080, which is Sapphire is actually able to match.
  • As for Red Dead Redemption 2  here we can see the Sapphire it's just 3 percent slower than the RTX 3090 when the Reference 6900 XT is 10 percent slower than means the Toxic is 5 FPS or 8 percent faster than AMD's reference card in this title.
  • Not every game scales as well with increased clock speed though and total war saga Troy is actually the game where the 6900xt performs at its worst relatively speaking when compared to the RTX 3090
  • The Sapphire is 15 percent slower than nvidia's flagship in this game, and it comes in just 4 percent faster than the reference 6900 XT, which really does show that increased clock speed doesn't always not you big gains. these are my honest review on all the gaming benchmark score. as I mention in game testing performance.

Shadow Of The Tomb Rider 

  • Now We playing the shadow of the tomb raider for 30 minutes saw the toxic peak at 68 degrees for the hot spot, and this was in a 21-degree room installed inside corsair obsidian 500d and fully populated with fans that are 30 degrees cooler than the AMD Reference Model. In order to maintain that impressive temperature, the fans spun at just 100 rpm, which is an incredibly low fan speed. 
  • Typical core clock seeing during our honest physical testing was 2470Mhz so that saw the power consumption for just the graphic card hit 349 watts. So that's almost the 20 percent increase over the AMD reference model.
  • So here is a quick look at fps performance in the shadow of the tomb raider at 1440p. Out of the box, Toxic was just 3% faster than the reference model and just a percent slower than the founder's edition RTX 3090. 
  • Now my manual overclock boosted performance by a further five percent, hitting an impressive 177 FPS. However, it is worth noting that only a 4 percent increase over the air-cooled and reference model, but the toxic was much cooler and quieter when overclocked.

Performance Overview


Finally, we come to watch dog legion here. The Toxic comes in 7 percent faster than the reference card, but it is still slower than RTX 3090 by $5%. The reference 6900xt, though, is a 11 percent slower at 4K,

so it is helping to close the gap across all the games we tested then the 6900xt is on average 8 percent faster than the Reference Card when testing out 4k and looking at 1440p the difference is 7 percent this explains why the 6900xt has really closed the gap on the all RTX 3090 in my original reference RX 6900 review we found that GPU is on average 10 percent slower than the RTX 3090.

But with the Radeon, the difference is now just 3 percent which, in my opinion, is a small enough difference to really not matter at all. We can also see that the Radeon RX 6900 XT is able to run out. I was a much more convincing when it against the RTX 3080 when the reference model was just 2 percent faster on average at 4k the Toxic is now 11 percent faster at 4k.

Result - Manual Overclocking

The lost area I want to touch on them is manual overclocking, and Here, we honestly had very limited gains. Radeon boost already pushes the GPU card the 2260 megahertz, and it pushes the memory to 2100 megahertz. Also, on the top of that, I was really able only to add an extra 40 megahertz to the GPU core and an extra 20 megahertz to the memory. as you might expects this really didn't make much of a difference in F1 2020. We only saw a 2 FPS boost while in watchdog's legion and gears 5. It was altered in a difference of a single frame.

Toxic Boost

There is also one click toxic boost option available via the trick software that automatically maxes the hand picked silicon out pushing it up to 2000Mhz and quite interestingly also overclocks the memory 16.8GB per seconds.

AMD Key Features - Sapphire RX 6900 XT

  • Dual BIOS
  • Max Boost
  • TriXX Software Switch
  • Premium Digital Power Design
  • Fuse Protection
  • Tri-X Cooling Technology
  • Intelligent Fan Control
  • Precision Fan Control
  • Backplate with ARGB
  • Two-Ball Bearing Fans
  • Hybrid Fan Blade
  • Wave Fin Design
  • V Shape Fin Design for GPU Cooling
  • Integrated Cooling Module
  • K6.5 Memory Pad
  • TriXX Supported
  • Fan Check
  • Fan Quick Connect
  • TriXX Boost
  • NITRO Glow
  • External RGB LED MB Synchronization


  • Occasionally matches RTX 3090
  • Hefty Factory Easy Overclocking
  • Power Efficient
  • RGB Lightening
  • Then e talk the price of RX 6900 XT it too much High Cost.
  • Beautiful and Solid Performance as compared to RTX 3090
  • Dimension: 268.77 x130.75 x 44.07 millimeters
  • VRM: Sapphire is using Infineon XDPE 132 G5D controller for the GPU VRM
  • Low Price
  • RTX 6900 XT Put up a pretty solid fight against nvidia RTX 3090 and 500 dollar less than 3090.


  • Performance Slower Than RTX 3090
  • When You play 2 hour gaming session this may lag little bit
  • When I play Sega troy the performance is very bad as compared to RTX 3090
  • If we talk about the performance of RX 6900 XT at 4K resolution the result will be in favor of RTX 3090 that's it major point of performance of 4K resolution.

Specification Of Sapphire RX 6900 XT

Ray Accelerators: 80
Memory Size/Bus: 16GB GDDR6
Memory Clock: 16GB Effective
Displays: Maximum 4 Displays
Resolution: HDMI™: 7680×4320  DisplayPort1.4: 7680×4320  USB-C: 7680x4320
Interface: PCI-Express 4.0
Output:  1x HDMI 2x DisplayPort 1x USB-C
BIOS Support: UEFI
Game Index: 4K
Cooling: 3 Fans

System Requirement:
Minimum 850 Watt Power Supply
2 x 8-pin Power Connector.
PCI Express® based PC is required with one X16 lane graphics slot available on the motherboard.
Minimum 8GB of system memory. 16GB recommended. 

Frequently Ask Questions

How much will the 6900 XT cost?

The price of Sapphire RX 6900 XT price starting at $1499. 

Where can I buy RX 6900 XT?

1) Amazon
2) Etsy
3) eBay
4) BestBuy
5) Alibaba
6) Newegg
7) B & H
8) Micro Center
9) Adorama

Is Sapphire RX 6900 XT better than RTX 3090?

According to the benchmark the Sapphire Toxic RX 6900 XT is 22 percent faster than RTX 3090, so that's why Toxic RX 6900 XT is better than RTX 3090

Where can I buy a 6900 XT in the UK?

You can simply buy at these site,

1) AMD
2) Overclockers UK
3) Ebuyer UK
4) Box UK

5) Scan

Final Thought - Sapphire Toxic RX 6900 XT

Final Thought - Sapphire Toxic RX 6900 XT

  • So then it is time to wrap up. In my view, the Sapphire Toxic RX 6900XT is a really impressive caught by significantly boosting the power limit Sapphire Toxic has allowed the GPU to run 350 megahertz faster than the reference card.
  • If you reading my full detailed article then you still confused which graphic card is best for your PC gaming performance. Here is the reference website which is already covered on Sapphire model and I am sure I already did this better review and am already telling you visit this site clear your doubt.  If you want to watch real time gaming performance then watching a YouTube video you will clear your all doubt and this video is based on full review RTX 3090 vs Sapphire RX 6900 XT real time gaming test, performance, overclocked.
  • That results in gains of up to 11 percent in the games we tested, but on average, the difference is 8 percent for an air-cooled card that 400-watt power limit would pose a significant problem but struck a three-engine 60 millimeter all in 1 to the GPU.
  • We didn't see temperatures exceed 64 degrees from a technical perspective is really impressive. Will Toxic done with this GPU, the main competitor to the Sapphire Toxic is obviously the RTX 3090, and I do think for many people, an air-cooled 3090 could be a better all-round option, and you're going to get the same sort of performance, but in an easy out package.
  • The thing I would say in response to that line of thinking, though, is the Toxic is clearly not really aimed at your average everyday consumer. Personally, I think if you have to be interested in these cards, you will be going to be a sort of series overclocker, a pretty hardcore enthusiast who wants to extract every lost a megahertz from your GPU.
  • And suppose you have that kind of buyer. In that case, you can have a lot of fun with a cool liquid card like this especially considering the 400-watt power limits.
  • In terms of pricing now Sapphire Toxic RX 6900 XT told us that the UK MSRP is going to be $$ pounds that are clearly a lot more than the reference MSRP of $$ pounds but considering the fact that the nitro two-plus RX 6900 is actually listed online for $$ pounds.
  • I would say when stock actually lands, and all the Toxic RX 6900 is probably going to be priced closer to $$ pounds than it is to be $$ pound MSRP. When we're talking those kinds of prices like I said and air cooled RTX 3090 could be a more comfortable option for anyone who just wants something fast, 
  • but if you don't want easy if you want a project if you want something to tune and tweak over weeks days even months I do really like the Toxic RX 6900 XT. So that's is my full honest review.

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