The RX 7800 XT opinions proceed at the moment as we check out the Sapphire Nitro+ mannequin. Sporting an eye catching design with RGB mild bar, dual-BIOS and a thick, triple-slot cooler, Sapphire’s Nitro+ sequence has supplied among the greatest AMD-based playing cards to hit the market in recent times. Today we discover out if this £539 RX 7800 XT can stay as much as that billing.
We’ve already reviewed the Sapphire RX 7900 XTX Nitro+ this technology and got here away severely impressed, so we now have have excessive hopes for the RX 7800 XT Nitro+. Utilising a near-identical design as its dearer sibling, the 7800 XT Nitro+ is actually a looker and Sapphire can be hoping it has the cooling grunt to again up that swish design. We’ll discover out quickly sufficient, so let’s dive in…
| 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 |
First, let’s take a fast take a look at the specs. Unlike the latest 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 12 months with the RX 7900 XTX and 7900 XT. This time round, the 7800 XT presents 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 lift of as much as 2430MHz. Sapphire has elevated this to 2565MHz for the OC BIOS, although the Silent BIOS stays with the reference 2430MHz goal pace,
Meanwhile, the reminiscence configuration is nearly similar 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 offers 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 Sapphire has once more elevated this for the OC BIOS. We are utilizing our well-established GPU energy testing methodology on this overview, so learn on for our most detailed energy and effectivity testing but.
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