XFX Radeon RX 7700 XT QICK 319 review

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Radeon RX 7000

 

Radeon RX 7000 Base design

There are several differences between RDNA 2 and RDNA 3. However, the RX 7000 series has 20% more Compute Units (CUs) and doubles the number of FP32 (32-bit floating point) computing functionality per CU. AMD still employs 64 Streaming Processors (SPs) per CU; however, that amount is more like double in many respects. Each GPU holds a single GCD chiplet (Graphics Compute Die) and up to six MCD chiplets (Memory Cache Die). The XTX has a fully enabled GCD and six MCDs. In contrast, the 7900 XT has a partially enabled GCD with 84 CUs and five MCDs — the sixth MCD slot will remain occupied, either with a dummy piece of silicon or a non-functional MCD (non-functional because it is fused off, though it may or may not be defective). Transistor counts have increased significantly compared to the previous generation RX 6000-series, with 58 billion total transistors compared to only 26.8 billion on Navi 21. Theoretical computation has increased by up to 159% compared to the RX 6950 XT, with 61.4 teraflops on the XTX card and 51.6 teraflops on the XT variant.


2023-08-30_14_35_04-guru3d.com

Radeon RX7900 XTX 7900 XT7900 GRE7800 XT7700 XT7600
Architecture RDNA 3
GPU Navi 31 Navi 32 Navi 33
Design Chiplet1 × GCD + 6 × MCD Chiplet1 × GCD + 5 × MCD Chiplet1 × GCD + 4 × MCD Chiplet1 × GCD + 3 × MCD Monolithic
production TSMC N5 (GCD)TSMC N6 (MCD) TSMC N6
transistors 57,7B 28.1B 13,3B
chip size 300 mm (GCD) 200mm (GDC)  204 mm²
CU/MS 96 84 80 60 54 32
FP32-ALUs 6.144/12.288 5.376/10.752 5.120/10.240 3.840/7.680 3.456/6.912 2.048/4.096
RT Core 96, 2nd Gen 84, 2nd Gen 80, 2nd Gen 60, 2nd Gen 54, 2nd Gen 32, 2nd Gen
ki-kerne 192, 1st Gen 168, 1st Gen 160, 1st Gen 120, 1st Gen 108, 1st Gen 64, 1st Gen
Game Tact 2.300 MHz 2.000 MHz 1.880 MHz 2.124 MHz 2.171 MHz 2.250 MHz
Boost Rate 2.500 MHz 2.400 MHz 2.245 MHz 2.430 MHz 2.544 MHz 2.625 MHz
FP32 processing power 61,4 TFLOPS 51,6 TFLOPS 46 TFLOPS 37,3 TFLOPS 35,2 TFLOPS 10,8 TFLOPS
FP16 processing power 122.9 TFLOPS 103,2 TFLOPS 92 TFLOPS 74,6 TFLOPS 70,3 TFLOPS 21,5 TFLOPS
texture units 384 336 320 240 216 128
ROPs 192 196 64
Storage 24GB GDDR6 20GB GDDR6 16 GB GDDR6 12GB GDDR6 8 GB GDDR6
memory throughput 20 Gbps 18 Gbps 19,5 Gbps 18 Gbps
memory interface 384 Bit 320 Bit 256 Bit 192 Bit 128 Bit
memory bandwidth 960 GB/s 880 GB/s 576 GB/s 624 GB/s 432 GB/s 288 GB/s
Infinity-Cache 96 MB, 2nd Gen 80 MB, 2nd Gen 64 MB, 2nd Gen 48 MB, 2nd Gen 32 MB, 2nd Gen
slot connection PCIe 4.0 ×16 PCIe 4.0 ×8
TBP 355 Watt 315 Watt 260 Watt 263 Watt 245 Watt 165 Watt
Price $999 $899 $799 $499 $449 $299

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