Following on from our launch day evaluate of AMD’s reference RX 7800 XT graphics card, as we speak we flip our consideration to the associate playing cards, and the PowerColoration Hellhound specifically. Offering a beefed-up triple fan cooler, dual-BIOS and a bodily change to regulate the lighting, this card hits the market at round £520. Is it value paying the £40 premium for? We discover out as we speak.
We had been usually impressed with the RX 7800 XT in our launch day evaluate, and whereas it is not an enormous step ahead from the earlier technology, it does supply convincing worth towards the likes of the RTX 4060 Ti and RTX 4070. While AMD’s personal RX 7800 XT reference (MBA) card was respectable, we might count on an skilled associate like PowerColoration to enhance on just about every thing with the RX 7800 XT Hellhound, so let’s discover out what this card can convey to the desk.
| RX 7900 XT | RX 7800 XT | RX 7700 XT | RX 6800 XT | RX 6800 | RX 6700 XT | |
| Architecture | RDNA 3 | RDNA 3 | RDNA 3 | RDNA 2 | RDNA 2 | RDNA 2 |
| Manufacturing Process | 5nm GCD + 6nm MCD | 5nm GCD + 6nm MCD | 5nm GCD + 6nm MCD | 7nm | 7nm | 7nm |
| Transistor Count | 57.7 billion | 28.1 billion | 28.1 billion | 26.8 billion | 26.8 billion | 17.2 billion |
| Die Size | 300 mm² GCD 220 mm² MCD | 200 mm² GCD 150 mm² MCD | 200 mm² GCD 150 mm² MCD | 519 mm² | 519 mm² | 336 mm² |
| Compute Units | 84 | 60 | 54 | 72 | 60 | 40 |
| Ray Accelerators | 84 | 60 | 54 | 72 | 60 | 40 |
| Stream Processors | 5376 | 3840 | 3456 | 4608 | 3840 | 2560 |
| Game GPU Clock | Up to 2000 MHz | 2124 MHz | 2171 MHz | Up to 2015MHz | Up to 1815MHz | Up to 2424MHz |
| Boost GPU Clock | Up to 2400 MHz | Up to 2430 MHz | Up to 2544 MHz | Up to 2250MHz | Up to 2105MHz | Up to 2581MHz |
| ROPs | 192 | 96 | 96 | 128 | 96 | 64 |
| AMD Infinity Cache | 80MB | 64MB | 48MB | 128MB | 128MB | 96MB |
| Memory | 20GB GDDR6 20Gbps | 16GB GDDR6 19.5 Gbps | 12GB GDDR6 18Gbps | 16GB GDDR6 16Gbps | 16GB GDDR6 16Gbps | 12GB GDDR6 16Gbps |
| Memory Bandwidth | 800 GB/s | 624 GB/s | 432 GB/s | 512 GB/s | 512 GB/s | 384 GB/s |
| Memory Interface | 320-bit | 256-bit | 192-bit | 256-bit | 256-bit | 192-bit |
| Board Power | 315W | 263W | 245W | 300W | 250W | 230W |
OC BIOS, left, in comparison with Silent BIOS, proper
First, let’s take a fast take a look at the specs. Unlike the newest RDNA 3 GPU – the RX 7600 – AMD has made a return to its chiplet-based design for the RX 7800 XT, as we initially noticed final yr with the RX 7900 XTX and 7900 XT. This time round, the 7800 XT affords a 200mm² Graphics Compute Die (GCD) utilizing TSMC’s 5nm course of, flanked by 4 150 mm² Memory Compute Dies (MCDs) constructed on TSMC’s 6nm node.
Internally although, the compute make-up hasn’t been radically modified. Navi 32 packs in 60 Compute Units, every of which homes 64 Stream Processors, for a complete of 3840 shaders. There are additionally 60 Ray Accelerators – one per CU – and 96 ROPs.
As for clock pace, this stays excessive with the RX 7800 XT, with AMD touting a reference increase clock of as much as 2430MHz. PowerColoration has tweaked this as much as 2520MHz for the OC BIOS nonetheless, whereas the Silent BIOS stays at inventory clocks.
Meanwhile, the reminiscence configuration is sort of an identical to the earlier technology RX 6800 XT. We nonetheless discover 16GB GDDR6 working over a 256-bit interface, however this time the reminiscence clocks in at 19.5Gbps, up from 16Gbps. This provides a reminiscence bandwidth of 624 GB/s, although AMD claims an ‘efficient’ bandwidth of 2708.4 GB/s as a result of 64MB of 2nd Gen Infinity cache.
Power draw for the RX 7800 XT is rated at 263W Total Board Power (TBP), although PowerColoration has once more elevated this for the OC BIOS. We are utilizing our well-established GPU energy testing methodology on this evaluate, so learn on for our most detailed energy and effectivity testing but.
Be certain to take a look at our sponsors retailer EKWB right here
